./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH --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 64bit --witnessprinter.graph.data.programhash 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:33:39,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:33:39,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:33:39,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:33:39,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:33:39,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:33:39,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:33:39,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:33:39,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:33:39,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:33:39,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:33:39,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:33:39,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:33:39,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:33:39,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:33:39,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:33:39,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:33:39,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:33:39,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:33:39,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:33:39,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:33:39,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:33:39,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:33:39,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:33:39,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:33:39,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:33:39,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:33:39,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:33:39,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:33:39,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:33:39,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:33:39,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:33:39,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:33:39,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:33:39,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:33:39,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:33:39,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:33:39,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:33:39,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:33:39,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:33:39,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:33:39,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 04:33:39,977 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:33:39,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:33:39,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:33:39,981 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:33:39,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:33:39,982 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:33:39,982 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:33:39,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:33:39,982 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:33:39,983 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:33:39,990 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:33:39,991 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:33:39,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:33:39,991 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:33:39,991 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:33:39,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:33:39,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:33:39,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:33:39,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:33:39,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:33:39,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:33:39,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:33:39,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:33:39,993 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:33:39,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:33:39,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:33:39,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:33:39,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:33:39,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:33:39,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:33:39,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:33:39,995 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:33:39,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:33:39,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:33:39,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:33:39,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:33:39,997 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_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2021-11-03 04:33:40,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:33:40,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:33:40,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:33:40,279 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:33:40,280 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:33:40,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:33:40,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/36c09a843/a59dc2cbdfab4085ab266bd0f27a711f/FLAG0c4d322a4 [2021-11-03 04:33:41,120 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:33:41,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:33:41,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/36c09a843/a59dc2cbdfab4085ab266bd0f27a711f/FLAG0c4d322a4 [2021-11-03 04:33:41,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/36c09a843/a59dc2cbdfab4085ab266bd0f27a711f [2021-11-03 04:33:41,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:33:41,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:33:41,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:41,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:33:41,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:33:41,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:41" (1/1) ... [2021-11-03 04:33:41,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7210966b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:41, skipping insertion in model container [2021-11-03 04:33:41,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:41" (1/1) ... [2021-11-03 04:33:41,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:33:41,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:33:42,562 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-03 04:33:42,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:42,624 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) [2021-11-03 04:33:42,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60e89799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:42, skipping insertion in model container [2021-11-03 04:33:42,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:42,626 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:33:42,628 INFO L168 Benchmark]: Toolchain (without parser) took 1350.48 ms. Allocated memory is still 136.3 MB. Free memory was 96.4 MB in the beginning and 74.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-03 04:33:42,629 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 46.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:33:42,630 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1345.33 ms. Allocated memory is still 136.3 MB. Free memory was 96.1 MB in the beginning and 74.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-03 04:33:42,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 46.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1345.33 ms. Allocated memory is still 136.3 MB. Free memory was 96.1 MB in the beginning and 74.0 MB in the end (delta: 22.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3619]: 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_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH --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 64bit --witnessprinter.graph.data.programhash 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:33:44,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:33:44,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:33:45,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:33:45,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:33:45,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:33:45,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:33:45,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:33:45,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:33:45,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:33:45,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:33:45,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:33:45,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:33:45,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:33:45,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:33:45,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:33:45,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:33:45,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:33:45,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:33:45,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:33:45,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:33:45,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:33:45,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:33:45,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:33:45,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:33:45,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:33:45,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:33:45,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:33:45,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:33:45,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:33:45,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:33:45,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:33:45,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:33:45,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:33:45,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:33:45,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:33:45,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:33:45,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:33:45,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:33:45,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:33:45,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:33:45,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 04:33:45,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:33:45,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:33:45,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:33:45,096 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:33:45,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:33:45,097 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:33:45,097 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:33:45,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:33:45,098 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:33:45,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:33:45,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:33:45,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:33:45,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:33:45,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:33:45,100 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:33:45,101 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:33:45,101 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:33:45,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:33:45,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:33:45,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:33:45,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:33:45,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:33:45,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:33:45,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:33:45,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:33:45,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:33:45,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:33:45,104 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:33:45,104 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:33:45,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:33:45,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:33:45,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:33:45,105 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_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2021-11-03 04:33:45,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:33:45,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:33:45,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:33:45,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:33:45,530 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:33:45,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:33:45,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/55b49daf4/324c23bf56114f5ca44598c7d363dbf0/FLAG7a3c05677 [2021-11-03 04:33:46,460 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:33:46,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:33:46,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/55b49daf4/324c23bf56114f5ca44598c7d363dbf0/FLAG7a3c05677 [2021-11-03 04:33:46,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/data/55b49daf4/324c23bf56114f5ca44598c7d363dbf0 [2021-11-03 04:33:46,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:33:46,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:33:46,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:46,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:33:46,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:33:46,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:46" (1/1) ... [2021-11-03 04:33:46,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a24c3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:46, skipping insertion in model container [2021-11-03 04:33:46,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:33:46" (1/1) ... [2021-11-03 04:33:47,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:33:47,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:33:48,315 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-03 04:33:48,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:48,388 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:33:48,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:33:48,713 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-03 04:33:48,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:48,761 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:33:49,069 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-03 04:33:49,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:33:49,152 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:33:49,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49 WrapperNode [2021-11-03 04:33:49,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:33:49,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:33:49,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:33:49,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:33:49,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:33:49,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:33:49,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:33:49,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:33:49,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:33:49,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:33:49,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:33:49,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:33:49,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (1/1) ... [2021-11-03 04:33:49,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:33:49,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:33:49,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:33:49,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:33:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:33:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 04:33:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:33:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 04:33:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 04:33:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 04:33:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 04:33:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 04:33:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 04:33:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 04:33:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:33:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:33:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:33:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 04:33:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 04:33:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 04:33:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:33:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 04:33:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 04:33:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:33:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:33:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 04:33:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-03 04:33:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:33:49,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 04:33:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-03 04:33:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 04:33:49,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:33:49,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:34:30,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:34:30,682 INFO L299 CfgBuilder]: Removed 759 assume(true) statements. [2021-11-03 04:34:30,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:34:30 BoogieIcfgContainer [2021-11-03 04:34:30,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:34:30,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:34:30,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:34:30,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:34:30,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:33:46" (1/3) ... [2021-11-03 04:34:30,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575d90f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:34:30, skipping insertion in model container [2021-11-03 04:34:30,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:33:49" (2/3) ... [2021-11-03 04:34:30,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575d90f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:34:30, skipping insertion in model container [2021-11-03 04:34:30,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:34:30" (3/3) ... [2021-11-03 04:34:30,696 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-03 04:34:30,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:34:30,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-03 04:34:30,756 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:34:30,762 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 [2021-11-03 04:34:30,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-03 04:34:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 868 states have (on average 1.4688940092165899) internal successors, (1275), 879 states have internal predecessors, (1275), 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) [2021-11-03 04:34:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:34:30,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:30,812 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:30,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:34:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1003833369, now seen corresponding path program 1 times [2021-11-03 04:34:30,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:30,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238088236] [2021-11-03 04:34:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:30,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:30,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:30,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:30,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:34:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:32,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:34:32,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:33,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:33,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238088236] [2021-11-03 04:34:33,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238088236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:33,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:33,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:34:33,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45276232] [2021-11-03 04:34:33,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:34:33,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:34:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:34:33,697 INFO L87 Difference]: Start difference. First operand has 880 states, 868 states have (on average 1.4688940092165899) internal successors, (1275), 879 states have internal predecessors, (1275), 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) Second operand has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2021-11-03 04:34:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:33,789 INFO L93 Difference]: Finished difference Result 1756 states and 2545 transitions. [2021-11-03 04:34:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:34:33,791 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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 54 [2021-11-03 04:34:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:33,814 INFO L225 Difference]: With dead ends: 1756 [2021-11-03 04:34:33,815 INFO L226 Difference]: Without dead ends: 868 [2021-11-03 04:34:33,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:34:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-03 04:34:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2021-11-03 04:34:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.3990665110851808) internal successors, (1199), 867 states have internal predecessors, (1199), 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) [2021-11-03 04:34:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1199 transitions. [2021-11-03 04:34:33,912 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1199 transitions. Word has length 54 [2021-11-03 04:34:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:33,912 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1199 transitions. [2021-11-03 04:34:33,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2021-11-03 04:34:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1199 transitions. [2021-11-03 04:34:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:34:33,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:33,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:33,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:34,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:34,131 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:34:34,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:34,132 INFO L85 PathProgramCache]: Analyzing trace with hash 527454111, now seen corresponding path program 1 times [2021-11-03 04:34:34,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:34,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931710967] [2021-11-03 04:34:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:34,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:34,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:34,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:34:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:35,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:34:35,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:36,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:37,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:37,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931710967] [2021-11-03 04:34:37,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931710967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:37,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:37,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:34:37,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050427908] [2021-11-03 04:34:37,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:34:37,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:34:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:34:37,457 INFO L87 Difference]: Start difference. First operand 868 states and 1199 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-03 04:34:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:41,564 INFO L93 Difference]: Finished difference Result 2461 states and 3414 transitions. [2021-11-03 04:34:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:34:41,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 54 [2021-11-03 04:34:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:41,576 INFO L225 Difference]: With dead ends: 2461 [2021-11-03 04:34:41,576 INFO L226 Difference]: Without dead ends: 1602 [2021-11-03 04:34:41,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:34:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-11-03 04:34:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 868. [2021-11-03 04:34:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.397899649941657) internal successors, (1198), 867 states have internal predecessors, (1198), 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) [2021-11-03 04:34:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1198 transitions. [2021-11-03 04:34:41,612 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1198 transitions. Word has length 54 [2021-11-03 04:34:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:41,613 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1198 transitions. [2021-11-03 04:34:41,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-03 04:34:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1198 transitions. [2021-11-03 04:34:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 04:34:41,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:41,616 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:41,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:41,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:41,839 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:34:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1583517125, now seen corresponding path program 1 times [2021-11-03 04:34:41,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:41,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26130054] [2021-11-03 04:34:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:41,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:41,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:41,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:41,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:34:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:43,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:34:43,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:44,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:44,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26130054] [2021-11-03 04:34:44,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26130054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:44,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:44,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:34:44,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35857067] [2021-11-03 04:34:44,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:44,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:34:44,756 INFO L87 Difference]: Start difference. First operand 868 states and 1198 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-03 04:35:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:08,860 INFO L93 Difference]: Finished difference Result 2429 states and 3375 transitions. [2021-11-03 04:35:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:35:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 56 [2021-11-03 04:35:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:08,874 INFO L225 Difference]: With dead ends: 2429 [2021-11-03 04:35:08,874 INFO L226 Difference]: Without dead ends: 1584 [2021-11-03 04:35:08,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:35:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-11-03 04:35:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 868. [2021-11-03 04:35:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.3967327887981331) internal successors, (1197), 867 states have internal predecessors, (1197), 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) [2021-11-03 04:35:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1197 transitions. [2021-11-03 04:35:08,922 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1197 transitions. Word has length 56 [2021-11-03 04:35:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:08,922 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1197 transitions. [2021-11-03 04:35:08,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-03 04:35:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1197 transitions. [2021-11-03 04:35:08,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:35:08,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:08,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:08,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:09,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:09,139 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:35:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1012273783, now seen corresponding path program 1 times [2021-11-03 04:35:09,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:09,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871310815] [2021-11-03 04:35:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:09,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:09,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:09,143 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:09,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:35:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:35:10,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:11,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:11,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:11,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871310815] [2021-11-03 04:35:11,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871310815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:11,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:11,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:35:11,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954992050] [2021-11-03 04:35:11,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:35:11,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:35:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:11,701 INFO L87 Difference]: Start difference. First operand 868 states and 1197 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-03 04:35:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:12,076 INFO L93 Difference]: Finished difference Result 1718 states and 2384 transitions. [2021-11-03 04:35:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:35:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 58 [2021-11-03 04:35:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:12,087 INFO L225 Difference]: With dead ends: 1718 [2021-11-03 04:35:12,087 INFO L226 Difference]: Without dead ends: 877 [2021-11-03 04:35:12,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:35:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-03 04:35:12,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2021-11-03 04:35:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 866 states have (on average 1.3926096997690531) internal successors, (1206), 876 states have internal predecessors, (1206), 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) [2021-11-03 04:35:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1206 transitions. [2021-11-03 04:35:12,117 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1206 transitions. Word has length 58 [2021-11-03 04:35:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:12,119 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1206 transitions. [2021-11-03 04:35:12,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-03 04:35:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1206 transitions. [2021-11-03 04:35:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:35:12,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:12,127 INFO L513 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] [2021-11-03 04:35:12,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:12,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:12,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:35:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash -599011052, now seen corresponding path program 1 times [2021-11-03 04:35:12,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:12,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518520508] [2021-11-03 04:35:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:12,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:12,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:12,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:12,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:35:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:13,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:35:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 04:35:14,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 04:35:16,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:16,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518520508] [2021-11-03 04:35:16,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518520508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:35:16,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793092574] [2021-11-03 04:35:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:16,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:16,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:35:16,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:35:16,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:35:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:35:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:35:17,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:35:17,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793092574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:17,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:35:17,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 04:35:17,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424692831] [2021-11-03 04:35:17,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:35:17,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:35:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:35:17,814 INFO L87 Difference]: Start difference. First operand 877 states and 1206 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-03 04:35:27,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:27,319 INFO L93 Difference]: Finished difference Result 1744 states and 2414 transitions. [2021-11-03 04:35:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:35:27,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 67 [2021-11-03 04:35:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:27,326 INFO L225 Difference]: With dead ends: 1744 [2021-11-03 04:35:27,326 INFO L226 Difference]: Without dead ends: 917 [2021-11-03 04:35:27,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:35:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-03 04:35:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 917. [2021-11-03 04:35:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 906 states have (on average 1.3929359823399559) internal successors, (1262), 916 states have internal predecessors, (1262), 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) [2021-11-03 04:35:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1262 transitions. [2021-11-03 04:35:27,389 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1262 transitions. Word has length 67 [2021-11-03 04:35:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:27,389 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1262 transitions. [2021-11-03 04:35:27,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-03 04:35:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1262 transitions. [2021-11-03 04:35:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 04:35:27,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:27,394 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:27,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:27,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-03 04:35:27,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:27,819 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:35:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:27,819 INFO L85 PathProgramCache]: Analyzing trace with hash -954749224, now seen corresponding path program 1 times [2021-11-03 04:35:27,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:27,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275348048] [2021-11-03 04:35:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:27,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:27,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:27,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:35:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:29,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:35:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:35:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:35:32,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:32,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275348048] [2021-11-03 04:35:32,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275348048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:35:32,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688119927] [2021-11-03 04:35:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:32,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:32,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:35:32,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:35:32,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 04:35:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:33,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:35:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:35:34,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:35:34,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688119927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:34,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:35:34,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-03 04:35:34,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949258004] [2021-11-03 04:35:34,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:35:34,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:35:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:35:34,648 INFO L87 Difference]: Start difference. First operand 917 states and 1262 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-11-03 04:35:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:37,585 INFO L93 Difference]: Finished difference Result 2637 states and 3659 transitions. [2021-11-03 04:35:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:35:37,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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 94 [2021-11-03 04:35:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:37,602 INFO L225 Difference]: With dead ends: 2637 [2021-11-03 04:35:37,602 INFO L226 Difference]: Without dead ends: 1756 [2021-11-03 04:35:37,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:35:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-11-03 04:35:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 913. [2021-11-03 04:35:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 902 states have (on average 1.3902439024390243) internal successors, (1254), 912 states have internal predecessors, (1254), 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) [2021-11-03 04:35:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1254 transitions. [2021-11-03 04:35:37,667 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1254 transitions. Word has length 94 [2021-11-03 04:35:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:37,668 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1254 transitions. [2021-11-03 04:35:37,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-11-03 04:35:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1254 transitions. [2021-11-03 04:35:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-03 04:35:37,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:37,671 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:37,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:37,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:38,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:38,082 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:35:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1710354903, now seen corresponding path program 1 times [2021-11-03 04:35:38,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:38,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205595698] [2021-11-03 04:35:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:38,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:38,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:38,086 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:38,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:35:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:35:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:35:41,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:35:42,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:42,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205595698] [2021-11-03 04:35:42,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205595698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:35:42,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1554885091] [2021-11-03 04:35:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:42,606 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:35:42,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:35:42,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:35:42,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-03 04:35:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:43,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:35:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:35:44,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:35:45,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1554885091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:45,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:35:45,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-03 04:35:45,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877028026] [2021-11-03 04:35:45,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:35:45,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:35:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:35:45,437 INFO L87 Difference]: Start difference. First operand 913 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-11-03 04:36:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:01,200 INFO L93 Difference]: Finished difference Result 1949 states and 2749 transitions. [2021-11-03 04:36:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:36:01,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 102 [2021-11-03 04:36:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:01,211 INFO L225 Difference]: With dead ends: 1949 [2021-11-03 04:36:01,211 INFO L226 Difference]: Without dead ends: 1086 [2021-11-03 04:36:01,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:36:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-03 04:36:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1086. [2021-11-03 04:36:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1075 states have (on average 1.4009302325581396) internal successors, (1506), 1085 states have internal predecessors, (1506), 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) [2021-11-03 04:36:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1506 transitions. [2021-11-03 04:36:01,253 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1506 transitions. Word has length 102 [2021-11-03 04:36:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:01,254 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1506 transitions. [2021-11-03 04:36:01,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-11-03 04:36:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1506 transitions. [2021-11-03 04:36:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-03 04:36:01,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:01,256 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:01,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:01,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:01,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:01,675 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:36:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash -578713513, now seen corresponding path program 1 times [2021-11-03 04:36:01,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:01,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594331981] [2021-11-03 04:36:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:01,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:01,678 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:01,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:36:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:03,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:36:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:36:04,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:36:06,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:06,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594331981] [2021-11-03 04:36:06,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594331981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:06,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120106167] [2021-11-03 04:36:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:06,407 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:06,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:36:06,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:36:06,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-03 04:36:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:07,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:36:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:36:08,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-03 04:36:08,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120106167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:08,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:36:08,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-03 04:36:08,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577361633] [2021-11-03 04:36:08,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:36:08,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:36:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:36:08,333 INFO L87 Difference]: Start difference. First operand 1086 states and 1506 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-11-03 04:36:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:17,236 INFO L93 Difference]: Finished difference Result 2126 states and 2965 transitions. [2021-11-03 04:36:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:36:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 106 [2021-11-03 04:36:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:17,247 INFO L225 Difference]: With dead ends: 2126 [2021-11-03 04:36:17,247 INFO L226 Difference]: Without dead ends: 1090 [2021-11-03 04:36:17,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:36:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-03 04:36:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1090. [2021-11-03 04:36:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1079 states have (on average 1.3994439295644114) internal successors, (1510), 1089 states have internal predecessors, (1510), 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) [2021-11-03 04:36:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1510 transitions. [2021-11-03 04:36:17,286 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1510 transitions. Word has length 106 [2021-11-03 04:36:17,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:17,286 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1510 transitions. [2021-11-03 04:36:17,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2021-11-03 04:36:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1510 transitions. [2021-11-03 04:36:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-03 04:36:17,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:17,288 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:17,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:17,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:17,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:17,711 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:36:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:17,711 INFO L85 PathProgramCache]: Analyzing trace with hash -578653931, now seen corresponding path program 1 times [2021-11-03 04:36:17,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:17,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632706829] [2021-11-03 04:36:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:17,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:17,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:17,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:17,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:36:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:36:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:36:20,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:36:22,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:22,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632706829] [2021-11-03 04:36:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632706829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:22,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087351238] [2021-11-03 04:36:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:22,371 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:22,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:36:22,372 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:36:22,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-03 04:36:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:36:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:36:26,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:36:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087351238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:27,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216163970] [2021-11-03 04:36:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:27,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:36:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:36:27,175 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:36:27,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-03 04:36:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:36:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:36:31,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 04:36:33,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216163970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:33,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:36:33,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 20 [2021-11-03 04:36:33,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380633303] [2021-11-03 04:36:33,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 04:36:33,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 04:36:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:36:33,954 INFO L87 Difference]: Start difference. First operand 1090 states and 1510 transitions. Second operand has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 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) [2021-11-03 04:37:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:05,013 INFO L93 Difference]: Finished difference Result 4900 states and 6897 transitions. [2021-11-03 04:37:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 04:37:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 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 106 [2021-11-03 04:37:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:05,062 INFO L225 Difference]: With dead ends: 4900 [2021-11-03 04:37:05,062 INFO L226 Difference]: Without dead ends: 4884 [2021-11-03 04:37:05,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 623 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-11-03 04:37:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-11-03 04:37:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 2039. [2021-11-03 04:37:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2028 states have (on average 1.4097633136094674) internal successors, (2859), 2038 states have internal predecessors, (2859), 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) [2021-11-03 04:37:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 2859 transitions. [2021-11-03 04:37:05,211 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 2859 transitions. Word has length 106 [2021-11-03 04:37:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:05,212 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 2859 transitions. [2021-11-03 04:37:05,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.071428571428571) internal successors, (127), 14 states have internal predecessors, (127), 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) [2021-11-03 04:37:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 2859 transitions. [2021-11-03 04:37:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-03 04:37:05,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:05,214 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:05,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:05,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:05,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:05,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:05,839 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:37:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1105728711, now seen corresponding path program 1 times [2021-11-03 04:37:05,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:05,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582716217] [2021-11-03 04:37:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:05,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:05,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:05,842 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:05,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:37:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:37:07,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 04:37:09,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 04:37:11,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:11,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582716217] [2021-11-03 04:37:11,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582716217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:11,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2053112395] [2021-11-03 04:37:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:11,205 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:37:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:37:11,206 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:37:11,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 04:37:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:37:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 04:37:15,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 04:37:16,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2053112395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:16,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191821275] [2021-11-03 04:37:16,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:16,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:37:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:37:16,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:37:16,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 04:37:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:18,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:37:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 04:37:21,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-03 04:37:24,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191821275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:37:24,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:37:24,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 20 [2021-11-03 04:37:24,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138646025] [2021-11-03 04:37:24,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 04:37:24,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 04:37:24,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:37:24,478 INFO L87 Difference]: Start difference. First operand 2039 states and 2859 transitions. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 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) [2021-11-03 04:38:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:01,162 INFO L93 Difference]: Finished difference Result 10181 states and 14472 transitions. [2021-11-03 04:38:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 04:38:01,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 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 121 [2021-11-03 04:38:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:01,201 INFO L225 Difference]: With dead ends: 10181 [2021-11-03 04:38:01,201 INFO L226 Difference]: Without dead ends: 10165 [2021-11-03 04:38:01,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 04:38:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10165 states. [2021-11-03 04:38:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10165 to 2044. [2021-11-03 04:38:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2033 states have (on average 1.4087555336940483) internal successors, (2864), 2043 states have internal predecessors, (2864), 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) [2021-11-03 04:38:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2864 transitions. [2021-11-03 04:38:01,422 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2864 transitions. Word has length 121 [2021-11-03 04:38:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:01,422 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 2864 transitions. [2021-11-03 04:38:01,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 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) [2021-11-03 04:38:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2864 transitions. [2021-11-03 04:38:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:38:01,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:01,426 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:01,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:01,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:01,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-03 04:38:02,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:38:02,039 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:38:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:02,040 INFO L85 PathProgramCache]: Analyzing trace with hash -329152188, now seen corresponding path program 1 times [2021-11-03 04:38:02,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:02,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209718076] [2021-11-03 04:38:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:02,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:02,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:02,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:38:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:04,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:38:04,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 04:38:05,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 04:38:07,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:07,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209718076] [2021-11-03 04:38:07,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209718076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:38:07,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43139577] [2021-11-03 04:38:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:07,737 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:38:07,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:38:07,738 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:38:07,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 04:38:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:11,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:38:11,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 04:38:12,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-03 04:38:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43139577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:38:13,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253742744] [2021-11-03 04:38:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:13,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:38:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:38:13,604 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:38:13,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 04:38:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:15,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:38:15,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 04:38:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 04:38:22,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253742744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:38:22,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:38:22,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 8, 8] total 20 [2021-11-03 04:38:22,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651280362] [2021-11-03 04:38:22,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 04:38:22,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 04:38:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:38:22,382 INFO L87 Difference]: Start difference. First operand 2044 states and 2864 transitions. Second operand has 20 states, 20 states have (on average 11.6) internal successors, (232), 20 states have internal predecessors, (232), 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) [2021-11-03 04:39:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:10,673 INFO L93 Difference]: Finished difference Result 14068 states and 19993 transitions. [2021-11-03 04:39:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:39:10,674 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 11.6) internal successors, (232), 20 states have internal predecessors, (232), 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 128 [2021-11-03 04:39:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:10,703 INFO L225 Difference]: With dead ends: 14068 [2021-11-03 04:39:10,703 INFO L226 Difference]: Without dead ends: 12053 [2021-11-03 04:39:10,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 757 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=304, Invalid=1178, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:39:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12053 states. [2021-11-03 04:39:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12053 to 3953. [2021-11-03 04:39:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3942 states have (on average 1.4137493658041602) internal successors, (5573), 3952 states have internal predecessors, (5573), 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) [2021-11-03 04:39:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 5573 transitions. [2021-11-03 04:39:11,128 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 5573 transitions. Word has length 128 [2021-11-03 04:39:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:11,128 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 5573 transitions. [2021-11-03 04:39:11,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.6) internal successors, (232), 20 states have internal predecessors, (232), 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) [2021-11-03 04:39:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 5573 transitions. [2021-11-03 04:39:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-03 04:39:11,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:11,133 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:11,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:11,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:11,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-03 04:39:11,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:39:11,751 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:39:11,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:11,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1219093779, now seen corresponding path program 1 times [2021-11-03 04:39:11,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:11,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106615606] [2021-11-03 04:39:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:11,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:11,754 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:11,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:39:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:14,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:39:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-03 04:39:16,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-03 04:39:18,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:18,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106615606] [2021-11-03 04:39:18,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106615606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:39:18,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1424970232] [2021-11-03 04:39:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:18,937 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:39:18,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:39:18,938 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:39:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 04:39:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:21,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:39:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-03 04:39:22,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-03 04:39:22,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1424970232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:22,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:39:22,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 12 [2021-11-03 04:39:22,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218766886] [2021-11-03 04:39:22,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:39:22,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:39:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:39:22,885 INFO L87 Difference]: Start difference. First operand 3953 states and 5573 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2021-11-03 04:39:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:37,908 INFO L93 Difference]: Finished difference Result 8539 states and 12187 transitions. [2021-11-03 04:39:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 144 [2021-11-03 04:39:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:37,915 INFO L225 Difference]: With dead ends: 8539 [2021-11-03 04:39:37,915 INFO L226 Difference]: Without dead ends: 4646 [2021-11-03 04:39:37,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:39:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-11-03 04:39:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 4636. [2021-11-03 04:39:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4625 states have (on average 1.4092972972972972) internal successors, (6518), 4635 states have internal predecessors, (6518), 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) [2021-11-03 04:39:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 6518 transitions. [2021-11-03 04:39:38,383 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 6518 transitions. Word has length 144 [2021-11-03 04:39:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:38,384 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 6518 transitions. [2021-11-03 04:39:38,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2021-11-03 04:39:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 6518 transitions. [2021-11-03 04:39:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-03 04:39:38,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:38,390 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:38,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:38,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:38,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:38,808 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:39:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:38,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1549953492, now seen corresponding path program 1 times [2021-11-03 04:39:38,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:38,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177660499] [2021-11-03 04:39:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:38,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:38,811 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:38,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:39:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:41,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:39:41,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-03 04:39:44,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-03 04:39:46,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:46,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177660499] [2021-11-03 04:39:46,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177660499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:39:46,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648507125] [2021-11-03 04:39:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:46,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:39:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:39:46,431 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:39:46,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 04:39:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:39:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-03 04:39:51,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-03 04:39:53,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648507125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:39:53,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169744105] [2021-11-03 04:39:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:53,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:39:53,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:39:53,036 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:39:53,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 04:39:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:55,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:39:55,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-03 04:39:59,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-03 04:40:03,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169744105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:03,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:40:03,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6, 6, 6] total 22 [2021-11-03 04:40:03,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428186002] [2021-11-03 04:40:03,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 04:40:03,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 04:40:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:40:03,463 INFO L87 Difference]: Start difference. First operand 4636 states and 6518 transitions. Second operand has 14 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 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) [2021-11-03 04:40:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:44,872 INFO L93 Difference]: Finished difference Result 16376 states and 23237 transitions. [2021-11-03 04:40:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 04:40:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 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 152 [2021-11-03 04:40:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:44,907 INFO L225 Difference]: With dead ends: 16376 [2021-11-03 04:40:44,907 INFO L226 Difference]: Without dead ends: 16360 [2021-11-03 04:40:44,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 899 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:40:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16360 states. [2021-11-03 04:40:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16360 to 5761. [2021-11-03 04:40:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5750 states have (on average 1.4104347826086956) internal successors, (8110), 5760 states have internal predecessors, (8110), 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) [2021-11-03 04:40:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 8110 transitions. [2021-11-03 04:40:45,406 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 8110 transitions. Word has length 152 [2021-11-03 04:40:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:45,407 INFO L470 AbstractCegarLoop]: Abstraction has 5761 states and 8110 transitions. [2021-11-03 04:40:45,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.5) internal successors, (161), 14 states have internal predecessors, (161), 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) [2021-11-03 04:40:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 8110 transitions. [2021-11-03 04:40:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-03 04:40:45,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:45,414 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:40:45,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:45,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-03 04:40:45,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:46,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:40:46,034 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:40:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash -850177336, now seen corresponding path program 1 times [2021-11-03 04:40:46,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:46,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89116949] [2021-11-03 04:40:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:46,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:46,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:46,038 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:46,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:40:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:40:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:40:51,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:40:53,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:53,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89116949] [2021-11-03 04:40:53,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89116949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:40:53,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [423322435] [2021-11-03 04:40:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:53,855 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:40:53,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:40:53,856 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:40:53,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 04:40:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:57,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:40:57,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:40:59,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:41:00,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [423322435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:41:00,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525967141] [2021-11-03 04:41:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:00,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:41:00,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:41:00,596 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:41:00,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-03 04:41:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:41:03,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:41:03,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:41:07,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-03 04:41:11,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525967141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:41:11,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:41:11,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 22 [2021-11-03 04:41:11,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14717942] [2021-11-03 04:41:11,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 04:41:11,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 04:41:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:41:11,553 INFO L87 Difference]: Start difference. First operand 5761 states and 8110 transitions. Second operand has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 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) [2021-11-03 04:42:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:01,946 INFO L93 Difference]: Finished difference Result 32150 states and 45723 transitions. [2021-11-03 04:42:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:42:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 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 153 [2021-11-03 04:42:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:02,010 INFO L225 Difference]: With dead ends: 32150 [2021-11-03 04:42:02,010 INFO L226 Difference]: Without dead ends: 26447 [2021-11-03 04:42:02,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-11-03 04:42:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26447 states. [2021-11-03 04:42:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26447 to 4648. [2021-11-03 04:42:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4637 states have (on average 1.408669398317878) internal successors, (6532), 4647 states have internal predecessors, (6532), 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) [2021-11-03 04:42:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 6532 transitions. [2021-11-03 04:42:02,628 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 6532 transitions. Word has length 153 [2021-11-03 04:42:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:02,628 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 6532 transitions. [2021-11-03 04:42:02,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.727272727272727) internal successors, (236), 22 states have internal predecessors, (236), 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) [2021-11-03 04:42:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 6532 transitions. [2021-11-03 04:42:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-03 04:42:02,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:02,635 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:02,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:42:02,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-03 04:42:03,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-03 04:42:03,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:42:03,251 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:42:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:03,252 INFO L85 PathProgramCache]: Analyzing trace with hash -558224030, now seen corresponding path program 1 times [2021-11-03 04:42:03,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:42:03,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809948665] [2021-11-03 04:42:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:03,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:42:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:42:03,255 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:42:03,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-03 04:42:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:07,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:42:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:42:07,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:42:08,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:42:08,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809948665] [2021-11-03 04:42:08,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809948665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:08,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:08,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:42:08,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592207793] [2021-11-03 04:42:08,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:42:08,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:42:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:42:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:42:08,710 INFO L87 Difference]: Start difference. First operand 4648 states and 6532 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-11-03 04:42:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:11,870 INFO L93 Difference]: Finished difference Result 13029 states and 18118 transitions. [2021-11-03 04:42:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:42:11,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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 162 [2021-11-03 04:42:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:11,877 INFO L225 Difference]: With dead ends: 13029 [2021-11-03 04:42:11,877 INFO L226 Difference]: Without dead ends: 8446 [2021-11-03 04:42:11,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:42:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-11-03 04:42:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 4656. [2021-11-03 04:42:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4645 states have (on average 1.4079655543595264) internal successors, (6540), 4655 states have internal predecessors, (6540), 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) [2021-11-03 04:42:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 6540 transitions. [2021-11-03 04:42:12,305 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 6540 transitions. Word has length 162 [2021-11-03 04:42:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:12,305 INFO L470 AbstractCegarLoop]: Abstraction has 4656 states and 6540 transitions. [2021-11-03 04:42:12,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 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) [2021-11-03 04:42:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 6540 transitions. [2021-11-03 04:42:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-03 04:42:12,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:12,309 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:12,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-03 04:42:12,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:42:12,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:42:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash -430084204, now seen corresponding path program 1 times [2021-11-03 04:42:12,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:42:12,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633264925] [2021-11-03 04:42:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:12,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:42:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:42:12,526 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:42:12,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 04:42:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 04:42:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-03 04:42:21,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-03 04:42:25,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:42:25,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633264925] [2021-11-03 04:42:25,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633264925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:42:25,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779303046] [2021-11-03 04:42:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:25,028 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:42:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:42:25,036 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:42:25,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 04:42:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:29,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:42:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-03 04:42:33,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-03 04:42:35,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779303046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:42:35,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357833782] [2021-11-03 04:42:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:35,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:42:35,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:42:35,599 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:42:35,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-03 04:42:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:38,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:42:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-03 04:42:41,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-03 04:42:43,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357833782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:42:43,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:42:43,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 8, 8] total 17 [2021-11-03 04:42:43,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843767496] [2021-11-03 04:42:43,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-03 04:42:43,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:42:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-03 04:42:43,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:42:43,850 INFO L87 Difference]: Start difference. First operand 4656 states and 6540 transitions. Second operand has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 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) [2021-11-03 04:43:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:36,760 INFO L93 Difference]: Finished difference Result 16426 states and 23289 transitions. [2021-11-03 04:43:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 04:43:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 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 164 [2021-11-03 04:43:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:36,774 INFO L225 Difference]: With dead ends: 16426 [2021-11-03 04:43:36,774 INFO L226 Difference]: Without dead ends: 16410 [2021-11-03 04:43:36,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 971 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-11-03 04:43:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16410 states. [2021-11-03 04:43:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16410 to 5777. [2021-11-03 04:43:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5766 states have (on average 1.4092958723551856) internal successors, (8126), 5776 states have internal predecessors, (8126), 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) [2021-11-03 04:43:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 8126 transitions. [2021-11-03 04:43:37,348 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 8126 transitions. Word has length 164 [2021-11-03 04:43:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:37,348 INFO L470 AbstractCegarLoop]: Abstraction has 5777 states and 8126 transitions. [2021-11-03 04:43:37,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.176470588235293) internal successors, (173), 17 states have internal predecessors, (173), 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) [2021-11-03 04:43:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 8126 transitions. [2021-11-03 04:43:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-03 04:43:37,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:37,355 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:37,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:37,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-03 04:43:37,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:37,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:37,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:43:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:37,972 INFO L85 PathProgramCache]: Analyzing trace with hash -696154328, now seen corresponding path program 1 times [2021-11-03 04:43:37,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:37,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700379950] [2021-11-03 04:43:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:37,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:37,974 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:37,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-03 04:43:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:42,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:43:42,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:43:43,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-03 04:43:45,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:45,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700379950] [2021-11-03 04:43:45,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700379950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:45,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:45,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-03 04:43:45,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221377707] [2021-11-03 04:43:45,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:43:45,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:45,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:43:45,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:43:45,210 INFO L87 Difference]: Start difference. First operand 5777 states and 8126 transitions. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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) [2021-11-03 04:44:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:02,145 INFO L93 Difference]: Finished difference Result 38318 states and 53102 transitions. [2021-11-03 04:44:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:44:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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 167 [2021-11-03 04:44:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:02,178 INFO L225 Difference]: With dead ends: 38318 [2021-11-03 04:44:02,179 INFO L226 Difference]: Without dead ends: 32606 [2021-11-03 04:44:02,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-11-03 04:44:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32606 states. [2021-11-03 04:44:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32606 to 5797. [2021-11-03 04:44:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5797 states, 5786 states have (on average 1.4078810922917386) internal successors, (8146), 5796 states have internal predecessors, (8146), 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) [2021-11-03 04:44:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5797 states to 5797 states and 8146 transitions. [2021-11-03 04:44:03,179 INFO L78 Accepts]: Start accepts. Automaton has 5797 states and 8146 transitions. Word has length 167 [2021-11-03 04:44:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:03,179 INFO L470 AbstractCegarLoop]: Abstraction has 5797 states and 8146 transitions. [2021-11-03 04:44:03,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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) [2021-11-03 04:44:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5797 states and 8146 transitions. [2021-11-03 04:44:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-03 04:44:03,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:03,185 INFO L513 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:03,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:03,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:03,407 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:44:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:03,407 INFO L85 PathProgramCache]: Analyzing trace with hash 664618212, now seen corresponding path program 1 times [2021-11-03 04:44:03,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:03,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654694268] [2021-11-03 04:44:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:03,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:03,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:03,411 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:03,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-03 04:44:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:08,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1681 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:44:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-03 04:44:08,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-03 04:44:08,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:08,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654694268] [2021-11-03 04:44:08,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654694268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:08,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:08,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:44:08,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609058888] [2021-11-03 04:44:08,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:44:08,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:08,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:44:08,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:44:08,904 INFO L87 Difference]: Start difference. First operand 5797 states and 8146 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2021-11-03 04:44:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:24,219 INFO L93 Difference]: Finished difference Result 11529 states and 16222 transitions. [2021-11-03 04:44:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:44:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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 169 [2021-11-03 04:44:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:24,224 INFO L225 Difference]: With dead ends: 11529 [2021-11-03 04:44:24,224 INFO L226 Difference]: Without dead ends: 5797 [2021-11-03 04:44:24,228 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:44:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5797 states. [2021-11-03 04:44:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5797 to 5787. [2021-11-03 04:44:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5787 states, 5776 states have (on average 1.3756925207756232) internal successors, (7946), 5786 states have internal predecessors, (7946), 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) [2021-11-03 04:44:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5787 states to 5787 states and 7946 transitions. [2021-11-03 04:44:24,932 INFO L78 Accepts]: Start accepts. Automaton has 5787 states and 7946 transitions. Word has length 169 [2021-11-03 04:44:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:24,932 INFO L470 AbstractCegarLoop]: Abstraction has 5787 states and 7946 transitions. [2021-11-03 04:44:24,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2021-11-03 04:44:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5787 states and 7946 transitions. [2021-11-03 04:44:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-03 04:44:24,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:24,936 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:24,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:25,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:25,136 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:44:25,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash 32738805, now seen corresponding path program 1 times [2021-11-03 04:44:25,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:25,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054047731] [2021-11-03 04:44:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:25,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:25,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:25,139 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:25,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-03 04:44:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:44:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-03 04:44:30,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-03 04:44:31,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:31,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054047731] [2021-11-03 04:44:31,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054047731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:31,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:31,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:44:31,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571028050] [2021-11-03 04:44:31,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:44:31,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:44:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:44:31,138 INFO L87 Difference]: Start difference. First operand 5787 states and 7946 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2021-11-03 04:44:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:46,579 INFO L93 Difference]: Finished difference Result 11509 states and 15822 transitions. [2021-11-03 04:44:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:44:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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 170 [2021-11-03 04:44:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:46,584 INFO L225 Difference]: With dead ends: 11509 [2021-11-03 04:44:46,584 INFO L226 Difference]: Without dead ends: 5787 [2021-11-03 04:44:46,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:44:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2021-11-03 04:44:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 5429. [2021-11-03 04:44:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5429 states, 5418 states have (on average 1.3650793650793651) internal successors, (7396), 5428 states have internal predecessors, (7396), 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) [2021-11-03 04:44:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5429 states to 5429 states and 7396 transitions. [2021-11-03 04:44:47,147 INFO L78 Accepts]: Start accepts. Automaton has 5429 states and 7396 transitions. Word has length 170 [2021-11-03 04:44:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:47,147 INFO L470 AbstractCegarLoop]: Abstraction has 5429 states and 7396 transitions. [2021-11-03 04:44:47,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2021-11-03 04:44:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 5429 states and 7396 transitions. [2021-11-03 04:44:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-03 04:44:47,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:47,151 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:47,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:47,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:47,351 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:44:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash -437175597, now seen corresponding path program 1 times [2021-11-03 04:44:47,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:47,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597739341] [2021-11-03 04:44:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:47,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:47,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:47,355 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:47,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-03 04:44:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 04:44:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-03 04:44:56,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-03 04:45:00,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:00,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597739341] [2021-11-03 04:45:00,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597739341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:00,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:00,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 15 [2021-11-03 04:45:00,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72492564] [2021-11-03 04:45:00,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-03 04:45:00,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-03 04:45:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:45:00,167 INFO L87 Difference]: Start difference. First operand 5429 states and 7396 transitions. Second operand has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 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) [2021-11-03 04:45:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:56,585 INFO L93 Difference]: Finished difference Result 27165 states and 37387 transitions. [2021-11-03 04:45:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:45:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 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 172 [2021-11-03 04:45:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:56,613 INFO L225 Difference]: With dead ends: 27165 [2021-11-03 04:45:56,613 INFO L226 Difference]: Without dead ends: 27149 [2021-11-03 04:45:56,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 04:45:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27149 states. [2021-11-03 04:45:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27149 to 6472. [2021-11-03 04:45:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6472 states, 6461 states have (on average 1.365578083887943) internal successors, (8823), 6471 states have internal predecessors, (8823), 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) [2021-11-03 04:45:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6472 states to 6472 states and 8823 transitions. [2021-11-03 04:45:57,481 INFO L78 Accepts]: Start accepts. Automaton has 6472 states and 8823 transitions. Word has length 172 [2021-11-03 04:45:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:57,482 INFO L470 AbstractCegarLoop]: Abstraction has 6472 states and 8823 transitions. [2021-11-03 04:45:57,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 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) [2021-11-03 04:45:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6472 states and 8823 transitions. [2021-11-03 04:45:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-03 04:45:57,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:57,489 INFO L513 BasicCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:57,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:57,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:57,707 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-03 04:45:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1238535369, now seen corresponding path program 1 times [2021-11-03 04:45:57,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:57,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436426878] [2021-11-03 04:45:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:57,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:57,710 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:57,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa797181-2b49-4048-8edc-f5ad51f2f101/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-03 04:46:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:46:02,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 04:46:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:46:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-03 04:46:13,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:46:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-03 04:46:18,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:46:18,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436426878] [2021-11-03 04:46:18,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436426878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:46:18,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:46:18,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 6] imperfect sequences [] total 17 [2021-11-03 04:46:18,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936580506] [2021-11-03 04:46:18,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-03 04:46:18,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:46:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-03 04:46:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-03 04:46:18,788 INFO L87 Difference]: Start difference. First operand 6472 states and 8823 transitions. Second operand has 17 states, 17 states have (on average 14.588235294117647) internal successors, (248), 17 states have internal predecessors, (248), 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)