./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i --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_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/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_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/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_2f086257-720b-4223-b335-4896b434c523/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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:45:52,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:45:52,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:45:52,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:45:52,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:45:52,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:45:52,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:45:52,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:45:52,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:45:52,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:45:52,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:45:52,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:45:52,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:45:52,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:45:52,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:45:52,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:45:52,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:45:52,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:45:52,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:45:52,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:45:52,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:45:52,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:45:52,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:45:52,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:45:52,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:45:52,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:45:52,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:45:52,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:45:52,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:45:52,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:45:52,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:45:52,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:45:52,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:45:52,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:45:52,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:45:52,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:45:52,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:45:52,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:45:52,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:45:52,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:45:52,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:45:52,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:45:52,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:45:52,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:45:52,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:45:52,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:45:52,980 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:45:52,980 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:45:52,980 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:45:52,980 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:45:52,981 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:45:52,981 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:45:52,982 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:45:52,982 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:45:52,982 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:45:52,982 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:45:52,983 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:45:52,983 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:45:52,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:45:52,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:45:52,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:45:52,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:45:52,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:45:52,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:45:52,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:45:52,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:45:52,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:45:52,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:45:52,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:45:52,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:45:52,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:45:52,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:45:52,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:45:52,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:52,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:45:52,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:45:52,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:45:52,989 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:45:52,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:45:52,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:45:52,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:45:52,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:45:52,990 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_2f086257-720b-4223-b335-4896b434c523/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-19 15:45:53,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:45:53,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:45:53,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:45:53,360 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:45:53,362 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:45:53,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-19 15:45:53,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/3d409f97c/86e0bbb8e8d64b4d875f2fab8cedb678/FLAG36f1f947f [2021-11-19 15:45:54,074 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:45:54,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-19 15:45:54,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/3d409f97c/86e0bbb8e8d64b4d875f2fab8cedb678/FLAG36f1f947f [2021-11-19 15:45:54,342 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/3d409f97c/86e0bbb8e8d64b4d875f2fab8cedb678 [2021-11-19 15:45:54,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:45:54,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:45:54,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:54,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:45:54,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:45:54,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:54" (1/1) ... [2021-11-19 15:45:54,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4657c340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:54, skipping insertion in model container [2021-11-19 15:45:54,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:54" (1/1) ... [2021-11-19 15:45:54,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:45:54,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:45:55,138 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-19 15:45:55,164 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-19 15:45:55,315 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-19 15:45:55,316 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-19 15:45:55,323 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:45:55,334 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 15:45:55,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53c9e02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:55, skipping insertion in model container [2021-11-19 15:45:55,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:55,341 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:45:55,344 INFO L158 Benchmark]: Toolchain (without parser) took 995.00ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 46.9MB in the beginning and 63.8MB in the end (delta: -17.0MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-19 15:45:55,345 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 83.9MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:45:55,346 INFO L158 Benchmark]: CACSL2BoogieTranslator took 989.93ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 46.7MB in the beginning and 63.8MB in the end (delta: -17.2MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-19 15:45:55,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 83.9MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 989.93ms. Allocated memory was 83.9MB in the beginning and 100.7MB in the end (delta: 16.8MB). Free memory was 46.7MB in the beginning and 63.8MB in the end (delta: -17.2MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: 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_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/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_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/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_2f086257-720b-4223-b335-4896b434c523/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 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:45:57,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:45:57,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:45:57,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:45:57,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:45:57,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:45:57,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:45:57,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:45:57,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:45:57,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:45:57,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:45:57,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:45:57,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:45:57,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:45:57,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:45:57,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:45:57,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:45:57,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:45:57,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:45:57,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:45:57,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:45:57,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:45:57,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:45:57,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:45:57,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:45:57,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:45:57,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:45:57,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:45:57,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:45:57,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:45:57,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:45:57,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:45:57,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:45:57,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:45:57,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:45:57,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:45:57,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:45:57,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:45:57,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:45:57,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:45:57,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:45:57,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:45:57,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:45:57,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:45:57,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:45:57,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:45:57,888 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:45:57,889 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:45:57,889 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:45:57,889 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:45:57,889 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:45:57,889 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:45:57,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:45:57,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:45:57,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:45:57,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:45:57,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:45:57,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:45:57,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:45:57,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:45:57,894 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:45:57,894 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:45:57,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:45:57,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:45:57,895 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:45:57,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:45:57,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:45:57,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:45:57,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:45:57,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:45:57,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:45:57,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:45:57,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:45:57,897 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:45:57,897 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:45:57,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:45:57,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:45:57,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:45:57,898 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_2f086257-720b-4223-b335-4896b434c523/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7743788eb05cb3443d5449a0c3250a50955573eb924e62e5cc797e3ef82e3ba3 [2021-11-19 15:45:58,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:45:58,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:45:58,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:45:58,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:45:58,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:45:58,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-19 15:45:58,421 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/2bde37fc1/68ce94c1bd164306be889899d0996666/FLAG327c7c581 [2021-11-19 15:45:59,214 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:45:59,214 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i [2021-11-19 15:45:59,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/2bde37fc1/68ce94c1bd164306be889899d0996666/FLAG327c7c581 [2021-11-19 15:45:59,364 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/data/2bde37fc1/68ce94c1bd164306be889899d0996666 [2021-11-19 15:45:59,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:45:59,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:45:59,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:45:59,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:45:59,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:45:59,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:59" (1/1) ... [2021-11-19 15:45:59,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba30803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:45:59, skipping insertion in model container [2021-11-19 15:45:59,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:45:59" (1/1) ... [2021-11-19 15:45:59,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:45:59,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:46:00,165 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-19 15:46:00,188 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-19 15:46:00,329 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-19 15:46:00,330 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-19 15:46:00,338 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:46:00,355 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:46:00,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:46:00,407 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-19 15:46:00,409 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-19 15:46:00,511 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-19 15:46:00,525 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-19 15:46:00,530 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:46:00,549 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:46:00,597 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44118,44131] [2021-11-19 15:46:00,600 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[44660,44673] [2021-11-19 15:46:00,714 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56247,56260] [2021-11-19 15:46:00,724 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_2f086257-720b-4223-b335-4896b434c523/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test6-1.i[56368,56381] [2021-11-19 15:46:00,728 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:46:00,823 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:46:00,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00 WrapperNode [2021-11-19 15:46:00,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:46:00,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:46:00,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:46:00,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:46:00,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:00,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:00,946 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1038 [2021-11-19 15:46:00,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:46:00,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:46:00,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:46:00,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:46:00,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:00,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:00,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:00,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:01,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:01,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:01,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:01,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:46:01,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:46:01,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:46:01,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:46:01,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (1/1) ... [2021-11-19 15:46:01,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:46:01,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:46:01,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:46:01,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:46:01,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 15:46:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:46:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:46:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 15:46:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:46:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:46:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:46:01,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:46:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-19 15:46:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-19 15:46:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 15:46:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 15:46:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:46:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:46:01,206 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-19 15:46:01,206 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-19 15:46:01,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:46:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-19 15:46:01,208 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-19 15:46:01,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:46:01,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:46:01,552 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:46:01,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:46:07,813 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:46:07,822 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:46:07,823 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-19 15:46:07,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:46:07 BoogieIcfgContainer [2021-11-19 15:46:07,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:46:07,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:46:07,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:46:07,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:46:07,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:45:59" (1/3) ... [2021-11-19 15:46:07,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183d165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:46:07, skipping insertion in model container [2021-11-19 15:46:07,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:00" (2/3) ... [2021-11-19 15:46:07,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183d165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:46:07, skipping insertion in model container [2021-11-19 15:46:07,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:46:07" (3/3) ... [2021-11-19 15:46:07,833 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test6-1.i [2021-11-19 15:46:07,839 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:46:07,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-19 15:46:07,892 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:46:07,899 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 15:46:07,899 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 15:46:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 15:46:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 15:46:07,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:07,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:07,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-19 15:46:07,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:07,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068529453] [2021-11-19 15:46:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:07,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:07,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:07,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:07,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:46:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:46:08,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:08,255 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 15:46:08,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:08,280 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 15:46:08,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:08,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068529453] [2021-11-19 15:46:08,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068529453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:08,282 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:08,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 15:46:08,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199051991] [2021-11-19 15:46:08,285 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:08,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:46:08,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:46:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:46:08,320 INFO L87 Difference]: Start difference. First operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:08,377 INFO L93 Difference]: Finished difference Result 445 states and 724 transitions. [2021-11-19 15:46:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:46:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 15:46:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:08,391 INFO L225 Difference]: With dead ends: 445 [2021-11-19 15:46:08,391 INFO L226 Difference]: Without dead ends: 218 [2021-11-19 15:46:08,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 15:46:08,400 INFO L933 BasicCegarLoop]: 285 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, 285 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 15:46:08,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:46:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-19 15:46:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-19 15:46:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 197 states have (on average 1.299492385786802) internal successors, (256), 202 states have internal predecessors, (256), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 15:46:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2021-11-19 15:46:08,469 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 8 [2021-11-19 15:46:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2021-11-19 15:46:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2021-11-19 15:46:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 15:46:08,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:08,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:08,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:08,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:08,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-19 15:46:08,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:08,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174628339] [2021-11-19 15:46:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:08,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:08,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:08,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:46:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:08,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:46:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:09,002 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 15:46:09,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:09,086 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 15:46:09,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:09,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174628339] [2021-11-19 15:46:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174628339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:09,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:09,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 15:46:09,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251412942] [2021-11-19 15:46:09,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:09,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:46:09,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:46:09,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:46:09,090 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:11,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:46:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:13,849 INFO L93 Difference]: Finished difference Result 551 states and 718 transitions. [2021-11-19 15:46:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:46:13,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-19 15:46:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:13,857 INFO L225 Difference]: With dead ends: 551 [2021-11-19 15:46:13,857 INFO L226 Difference]: Without dead ends: 335 [2021-11-19 15:46:13,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:46:13,861 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:13,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 751 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 15:46:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-19 15:46:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 325. [2021-11-19 15:46:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 304 states have (on average 1.3092105263157894) internal successors, (398), 309 states have internal predecessors, (398), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 15:46:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 423 transitions. [2021-11-19 15:46:13,918 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 423 transitions. Word has length 10 [2021-11-19 15:46:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:13,918 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 423 transitions. [2021-11-19 15:46:13,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 423 transitions. [2021-11-19 15:46:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 15:46:13,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:13,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:13,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:14,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:14,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1199048252, now seen corresponding path program 1 times [2021-11-19 15:46:14,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:14,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884672615] [2021-11-19 15:46:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:14,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:14,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:14,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:14,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:46:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:14,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:46:14,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:46:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:46:14,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:46:14,440 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 15:46:14,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 15:46:14,540 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 15:46:14,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 15:46:14,588 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 15:46:14,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:14,673 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 15:46:14,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:14,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884672615] [2021-11-19 15:46:14,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884672615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:14,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:14,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:46:14,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973951476] [2021-11-19 15:46:14,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:14,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:46:14,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:46:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:46:14,677 INFO L87 Difference]: Start difference. First operand 325 states and 423 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:17,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:46:19,715 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:46:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:25,231 INFO L93 Difference]: Finished difference Result 664 states and 870 transitions. [2021-11-19 15:46:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:46:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 15:46:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:25,236 INFO L225 Difference]: With dead ends: 664 [2021-11-19 15:46:25,237 INFO L226 Difference]: Without dead ends: 490 [2021-11-19 15:46:25,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:46:25,240 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 229 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:25,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1226 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2021-11-19 15:46:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-19 15:46:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 324. [2021-11-19 15:46:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 303 states have (on average 1.306930693069307) internal successors, (396), 308 states have internal predecessors, (396), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 15:46:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 421 transitions. [2021-11-19 15:46:25,274 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 421 transitions. Word has length 13 [2021-11-19 15:46:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:25,275 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 421 transitions. [2021-11-19 15:46:25,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 421 transitions. [2021-11-19 15:46:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 15:46:25,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:25,277 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] [2021-11-19 15:46:25,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:25,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:25,488 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1082818915, now seen corresponding path program 1 times [2021-11-19 15:46:25,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:25,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590444862] [2021-11-19 15:46:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:25,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:25,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:25,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:25,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:46:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:46:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:25,867 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 15:46:25,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:26,029 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 15:46:26,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:26,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590444862] [2021-11-19 15:46:26,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590444862] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:26,030 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:26,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:46:26,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116197200] [2021-11-19 15:46:26,030 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:26,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:46:26,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:46:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:46:26,032 INFO L87 Difference]: Start difference. First operand 324 states and 421 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:26,204 INFO L93 Difference]: Finished difference Result 646 states and 846 transitions. [2021-11-19 15:46:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:46:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 15:46:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:26,208 INFO L225 Difference]: With dead ends: 646 [2021-11-19 15:46:26,208 INFO L226 Difference]: Without dead ends: 332 [2021-11-19 15:46:26,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:46:26,218 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 220 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:26,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 595 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:46:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-19 15:46:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2021-11-19 15:46:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 309 states have (on average 1.249190938511327) internal successors, (386), 314 states have internal predecessors, (386), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 15:46:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 411 transitions. [2021-11-19 15:46:26,258 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 411 transitions. Word has length 47 [2021-11-19 15:46:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:26,259 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 411 transitions. [2021-11-19 15:46:26,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 411 transitions. [2021-11-19 15:46:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 15:46:26,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:26,264 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] [2021-11-19 15:46:26,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:26,483 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:26,484 INFO L85 PathProgramCache]: Analyzing trace with hash 206381993, now seen corresponding path program 1 times [2021-11-19 15:46:26,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:26,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695428343] [2021-11-19 15:46:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:26,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:26,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:26,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:26,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:46:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:26,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:46:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:26,886 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 15:46:26,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:27,029 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 15:46:27,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:27,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695428343] [2021-11-19 15:46:27,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695428343] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:27,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:27,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 15:46:27,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485256391] [2021-11-19 15:46:27,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:27,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:46:27,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:46:27,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:46:27,033 INFO L87 Difference]: Start difference. First operand 330 states and 411 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:27,205 INFO L93 Difference]: Finished difference Result 342 states and 423 transitions. [2021-11-19 15:46:27,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:46:27,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 15:46:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:27,209 INFO L225 Difference]: With dead ends: 342 [2021-11-19 15:46:27,210 INFO L226 Difference]: Without dead ends: 340 [2021-11-19 15:46:27,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:46:27,211 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 19 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:27,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1319 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:46:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-19 15:46:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-19 15:46:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 316 states have (on average 1.2468354430379747) internal successors, (394), 322 states have internal predecessors, (394), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 15:46:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 421 transitions. [2021-11-19 15:46:27,234 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 421 transitions. Word has length 47 [2021-11-19 15:46:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:27,235 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 421 transitions. [2021-11-19 15:46:27,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:46:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 421 transitions. [2021-11-19 15:46:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 15:46:27,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:27,238 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:27,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:27,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:27,460 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1298801861, now seen corresponding path program 1 times [2021-11-19 15:46:27,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:27,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284534301] [2021-11-19 15:46:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:27,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:27,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:27,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:46:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:46:27,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:46:28,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:46:28,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:28,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284534301] [2021-11-19 15:46:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284534301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:28,519 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:28,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-19 15:46:28,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394034777] [2021-11-19 15:46:28,520 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 15:46:28,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 15:46:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:46:28,521 INFO L87 Difference]: Start difference. First operand 340 states and 421 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 15:46:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:28,874 INFO L93 Difference]: Finished difference Result 647 states and 811 transitions. [2021-11-19 15:46:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:46:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2021-11-19 15:46:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:28,880 INFO L225 Difference]: With dead ends: 647 [2021-11-19 15:46:28,880 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 15:46:28,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:46:28,883 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 71 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:28,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1211 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:46:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 15:46:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2021-11-19 15:46:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 318 states have (on average 1.2452830188679245) internal successors, (396), 325 states have internal predecessors, (396), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-19 15:46:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 426 transitions. [2021-11-19 15:46:28,909 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 426 transitions. Word has length 62 [2021-11-19 15:46:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:28,910 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 426 transitions. [2021-11-19 15:46:28,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 15:46:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 426 transitions. [2021-11-19 15:46:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 15:46:28,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:28,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:28,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:29,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:29,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2017357497, now seen corresponding path program 1 times [2021-11-19 15:46:29,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:29,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91710418] [2021-11-19 15:46:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:29,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:29,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:29,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:29,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:46:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:29,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:46:29,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:46:29,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:46:29,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:29,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91710418] [2021-11-19 15:46:29,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91710418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:29,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:46:29,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:46:29,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639528036] [2021-11-19 15:46:29,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:29,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:46:29,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:46:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:46:29,825 INFO L87 Difference]: Start difference. First operand 344 states and 426 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:46:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:29,970 INFO L93 Difference]: Finished difference Result 652 states and 817 transitions. [2021-11-19 15:46:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:46:29,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2021-11-19 15:46:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:29,975 INFO L225 Difference]: With dead ends: 652 [2021-11-19 15:46:29,976 INFO L226 Difference]: Without dead ends: 355 [2021-11-19 15:46:29,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:46:29,978 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 8 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:29,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1056 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:46:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-19 15:46:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2021-11-19 15:46:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 327 states have (on average 1.2507645259938838) internal successors, (409), 335 states have internal predecessors, (409), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-19 15:46:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 440 transitions. [2021-11-19 15:46:30,003 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 440 transitions. Word has length 67 [2021-11-19 15:46:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:30,004 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 440 transitions. [2021-11-19 15:46:30,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 15:46:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 440 transitions. [2021-11-19 15:46:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 15:46:30,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:30,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:46:30,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:30,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:30,229 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 419792281, now seen corresponding path program 1 times [2021-11-19 15:46:30,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:30,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845559167] [2021-11-19 15:46:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:30,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:30,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:30,232 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:30,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:46:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:30,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:46:30,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:46:30,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:46:31,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:31,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845559167] [2021-11-19 15:46:31,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845559167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:31,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089520435] [2021-11-19 15:46:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:31,200 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:31,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:31,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:31,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:46:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:31,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:46:31,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:46:31,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:46:32,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089520435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:32,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525488645] [2021-11-19 15:46:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:32,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:46:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:46:32,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:46:32,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 15:46:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:32,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:46:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:46:32,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 15:46:33,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525488645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:33,147 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 15:46:33,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 8, 7] total 21 [2021-11-19 15:46:33,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306650592] [2021-11-19 15:46:33,148 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:33,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:46:33,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:33,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:46:33,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-19 15:46:33,149 INFO L87 Difference]: Start difference. First operand 355 states and 440 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 15:46:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:33,876 INFO L93 Difference]: Finished difference Result 1943 states and 2472 transitions. [2021-11-19 15:46:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:46:33,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-11-19 15:46:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:33,889 INFO L225 Difference]: With dead ends: 1943 [2021-11-19 15:46:33,889 INFO L226 Difference]: Without dead ends: 1635 [2021-11-19 15:46:33,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-19 15:46:33,892 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1270 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:33,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1270 Valid, 2269 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:46:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-11-19 15:46:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1235. [2021-11-19 15:46:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1161 states have (on average 1.26442721791559) internal successors, (1468), 1174 states have internal predecessors, (1468), 43 states have call successors, (43), 23 states have call predecessors, (43), 27 states have return successors, (48), 37 states have call predecessors, (48), 41 states have call successors, (48) [2021-11-19 15:46:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1559 transitions. [2021-11-19 15:46:33,970 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1559 transitions. Word has length 69 [2021-11-19 15:46:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:33,970 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1559 transitions. [2021-11-19 15:46:33,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 15:46:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1559 transitions. [2021-11-19 15:46:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 15:46:33,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:33,973 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 15:46:33,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:34,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:34,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:34,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:34,577 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash -948266266, now seen corresponding path program 1 times [2021-11-19 15:46:34,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:34,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45035259] [2021-11-19 15:46:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:34,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:34,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:34,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:34,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:46:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:46:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:46:35,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:35,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:35,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45035259] [2021-11-19 15:46:35,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45035259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:35,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277356608] [2021-11-19 15:46:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:35,719 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:35,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 15:46:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:46:36,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 15:46:36,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:46:36,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1277356608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:36,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833521764] [2021-11-19 15:46:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:36,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:46:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:46:36,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:46:36,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 15:46:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:36,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:46:36,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:37,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:46:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:46:37,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:46:37,261 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 15:46:37,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-19 15:46:37,376 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 15:46:37,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-19 15:46:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:46:37,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 15:46:37,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833521764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:37,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 15:46:37,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-11-19 15:46:37,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231488629] [2021-11-19 15:46:37,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:37,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:46:37,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:46:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:46:37,696 INFO L87 Difference]: Start difference. First operand 1235 states and 1559 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 15:46:40,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:46:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:46,368 INFO L93 Difference]: Finished difference Result 1720 states and 2218 transitions. [2021-11-19 15:46:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:46:46,371 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 101 [2021-11-19 15:46:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:46,384 INFO L225 Difference]: With dead ends: 1720 [2021-11-19 15:46:46,384 INFO L226 Difference]: Without dead ends: 1696 [2021-11-19 15:46:46,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:46:46,387 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 209 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:46,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 895 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2021-11-19 15:46:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-11-19 15:46:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1527. [2021-11-19 15:46:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1446 states have (on average 1.281466113416321) internal successors, (1853), 1461 states have internal predecessors, (1853), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 15:46:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1958 transitions. [2021-11-19 15:46:46,483 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1958 transitions. Word has length 101 [2021-11-19 15:46:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:46,484 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 1958 transitions. [2021-11-19 15:46:46,484 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 15:46:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1958 transitions. [2021-11-19 15:46:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:46:46,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:46,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:46:46,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:46,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:46,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:47,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:47,112 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash 281549929, now seen corresponding path program 1 times [2021-11-19 15:46:47,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:47,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087304497] [2021-11-19 15:46:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:47,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:47,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:47,114 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:47,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:46:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:46:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:46:47,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:46:48,291 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:48,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087304497] [2021-11-19 15:46:48,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087304497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:48,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1665856385] [2021-11-19 15:46:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:48,291 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:48,292 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:48,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 15:46:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:46:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:46:48,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:46:48,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1665856385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:46:48,990 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:46:48,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 15:46:48,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054690237] [2021-11-19 15:46:48,991 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:46:48,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:46:48,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:46:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:46:48,992 INFO L87 Difference]: Start difference. First operand 1527 states and 1958 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 15:46:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:49,093 INFO L93 Difference]: Finished difference Result 3012 states and 3874 transitions. [2021-11-19 15:46:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:46:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 113 [2021-11-19 15:46:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:49,104 INFO L225 Difference]: With dead ends: 3012 [2021-11-19 15:46:49,104 INFO L226 Difference]: Without dead ends: 1532 [2021-11-19 15:46:49,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:46:49,108 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 0 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:49,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:46:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-11-19 15:46:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1532. [2021-11-19 15:46:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1451 states have (on average 1.2804962095106822) internal successors, (1858), 1466 states have internal predecessors, (1858), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 15:46:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 1963 transitions. [2021-11-19 15:46:49,193 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 1963 transitions. Word has length 113 [2021-11-19 15:46:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:49,194 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 1963 transitions. [2021-11-19 15:46:49,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 15:46:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 1963 transitions. [2021-11-19 15:46:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 15:46:49,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:49,196 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:46:49,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:49,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:49,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:49,616 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:49,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1641678105, now seen corresponding path program 1 times [2021-11-19 15:46:49,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:49,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894341839] [2021-11-19 15:46:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:49,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:49,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:49,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:49,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:46:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:46:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:46:50,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:46:50,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:50,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894341839] [2021-11-19 15:46:50,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894341839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:50,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [694706153] [2021-11-19 15:46:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:50,723 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:50,724 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:50,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 15:46:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:46:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:46:51,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 15:46:51,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [694706153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:51,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002300652] [2021-11-19 15:46:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:46:51,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:46:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:46:51,807 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:46:51,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 15:46:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:46:52,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:46:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:46:52,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:46:52,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002300652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:52,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:46:52,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 14 [2021-11-19 15:46:52,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268126638] [2021-11-19 15:46:52,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:46:52,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 15:46:52,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:46:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 15:46:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:46:52,638 INFO L87 Difference]: Start difference. First operand 1532 states and 1963 transitions. Second operand has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:46:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:46:53,426 INFO L93 Difference]: Finished difference Result 3109 states and 4010 transitions. [2021-11-19 15:46:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 15:46:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 113 [2021-11-19 15:46:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:46:53,437 INFO L225 Difference]: With dead ends: 3109 [2021-11-19 15:46:53,437 INFO L226 Difference]: Without dead ends: 1600 [2021-11-19 15:46:53,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:46:53,442 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 95 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:46:53,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1851 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:46:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-11-19 15:46:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1564. [2021-11-19 15:46:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1483 states have (on average 1.2852326365475388) internal successors, (1906), 1498 states have internal predecessors, (1906), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 15:46:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2011 transitions. [2021-11-19 15:46:53,538 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2011 transitions. Word has length 113 [2021-11-19 15:46:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:46:53,538 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2011 transitions. [2021-11-19 15:46:53,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:46:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2011 transitions. [2021-11-19 15:46:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 15:46:53,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:46:53,543 INFO L514 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:46:53,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:53,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-19 15:46:53,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:46:54,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:46:54,157 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:46:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:46:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1776847847, now seen corresponding path program 2 times [2021-11-19 15:46:54,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:46:54,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754835760] [2021-11-19 15:46:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:46:54,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:46:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:46:54,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:46:54,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:46:54,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:46:54,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:46:55,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:46:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:46:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:46:55,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:46:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:46:56,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:46:56,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754835760] [2021-11-19 15:46:56,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754835760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:46:56,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091921164] [2021-11-19 15:46:56,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:46:56,294 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:46:56,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:46:56,303 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:46:56,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 15:48:21,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:48:21,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:48:21,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:48:21,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 15:48:21,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 15:48:21,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1091921164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:48:21,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88320721] [2021-11-19 15:48:21,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:48:21,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:48:21,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:48:21,705 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:48:21,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 15:52:58,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:52:58,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:52:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:52:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:52:58,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 15:52:59,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88320721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:52:59,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:52:59,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 27 [2021-11-19 15:52:59,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403137535] [2021-11-19 15:52:59,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:52:59,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 15:52:59,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:59,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 15:52:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-11-19 15:52:59,636 INFO L87 Difference]: Start difference. First operand 1564 states and 2011 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:53:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:53:03,340 INFO L93 Difference]: Finished difference Result 3253 states and 4218 transitions. [2021-11-19 15:53:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 15:53:03,341 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 121 [2021-11-19 15:53:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:53:03,351 INFO L225 Difference]: With dead ends: 3253 [2021-11-19 15:53:03,351 INFO L226 Difference]: Without dead ends: 1700 [2021-11-19 15:53:03,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1077, Invalid=2829, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 15:53:03,357 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 322 mSDsluCounter, 3751 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:53:03,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 4027 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 15:53:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-11-19 15:53:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1628. [2021-11-19 15:53:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1547 states have (on average 1.2915319974143504) internal successors, (1998), 1562 states have internal predecessors, (1998), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 15:53:03,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2103 transitions. [2021-11-19 15:53:03,439 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2103 transitions. Word has length 121 [2021-11-19 15:53:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:53:03,440 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2103 transitions. [2021-11-19 15:53:03,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 15:53:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2103 transitions. [2021-11-19 15:53:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 15:53:03,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:53:03,442 INFO L514 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:53:03,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:03,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:03,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:04,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:53:04,061 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 15:53:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:53:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash -189338137, now seen corresponding path program 3 times [2021-11-19 15:53:04,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:53:04,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103415540] [2021-11-19 15:53:04,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:53:04,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:53:04,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:53:04,064 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:53:04,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:53:20,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 15:53:20,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:53:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 15:53:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 15:53:20,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 213 proven. 108 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-19 15:53:23,109 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:53:23,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103415540] [2021-11-19 15:53:23,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103415540] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:53:23,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686881980] [2021-11-19 15:53:23,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:53:23,110 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:53:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:53:23,111 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:53:23,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f086257-720b-4223-b335-4896b434c523/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process