./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/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 32bit --witnessprinter.graph.data.programhash 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:21:45,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:21:45,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:21:45,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:21:45,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:21:45,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:21:45,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:21:45,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:21:45,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:21:45,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:21:45,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:21:45,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:21:45,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:21:45,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:21:45,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:21:45,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:21:45,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:21:45,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:21:45,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:21:45,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:21:45,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:21:45,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:21:45,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:21:45,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:21:45,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:21:45,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:21:45,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:21:45,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:21:45,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:21:45,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:21:45,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:21:45,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:21:45,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:21:45,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:21:45,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:21:45,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:21:45,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:21:45,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:21:45,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:21:45,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:21:45,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:21:45,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:21:46,047 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:21:46,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:21:46,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:21:46,051 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:21:46,051 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:21:46,051 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:21:46,052 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:21:46,052 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:21:46,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:21:46,053 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:21:46,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:21:46,054 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:21:46,055 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:21:46,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:21:46,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:21:46,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:21:46,057 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:21:46,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:21:46,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:21:46,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:21:46,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:21:46,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:21:46,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:21:46,059 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:21:46,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:21:46,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:21:46,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:21:46,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:21:46,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:21:46,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:21:46,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:46,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:21:46,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:21:46,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:21:46,064 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:21:46,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:21:46,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:21:46,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:21:46,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:21:46,066 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-11-03 04:21:46,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:21:46,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:21:46,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:21:46,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:21:46,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:21:46,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-03 04:21:46,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/8aec804be/7cc74dd966f846aca22889849179e23b/FLAG79091e4be [2021-11-03 04:21:47,505 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:21:47,507 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-03 04:21:47,560 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/8aec804be/7cc74dd966f846aca22889849179e23b/FLAG79091e4be [2021-11-03 04:21:48,063 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/8aec804be/7cc74dd966f846aca22889849179e23b [2021-11-03 04:21:48,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:21:48,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:21:48,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:48,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:21:48,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:21:48,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:48" (1/1) ... [2021-11-03 04:21:48,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5913b1dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:48, skipping insertion in model container [2021-11-03 04:21:48,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:48" (1/1) ... [2021-11-03 04:21:48,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:21:48,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:48,634 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-03 04:21:49,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:49,033 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 04:21:49,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65c8411b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:49, skipping insertion in model container [2021-11-03 04:21:49,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:49,035 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:21:49,039 INFO L168 Benchmark]: Toolchain (without parser) took 968.94 ms. Allocated memory is still 100.7 MB. Free memory was 61.3 MB in the beginning and 61.5 MB in the end (delta: -271.0 kB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:21:49,041 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 80.4 MB in the beginning and 80.4 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:21:49,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 949.25 ms. Allocated memory is still 100.7 MB. Free memory was 61.1 MB in the beginning and 61.5 MB in the end (delta: -451.2 kB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:21:49,047 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 80.4 MB in the beginning and 80.4 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 949.25 ms. Allocated memory is still 100.7 MB. Free memory was 61.1 MB in the beginning and 61.5 MB in the end (delta: -451.2 kB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/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 32bit --witnessprinter.graph.data.programhash 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:21:51,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:21:51,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:21:52,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:21:52,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:21:52,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:21:52,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:21:52,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:21:52,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:21:52,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:21:52,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:21:52,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:21:52,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:21:52,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:21:52,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:21:52,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:21:52,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:21:52,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:21:52,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:21:52,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:21:52,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:21:52,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:21:52,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:21:52,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:21:52,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:21:52,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:21:52,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:21:52,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:21:52,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:21:52,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:21:52,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:21:52,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:21:52,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:21:52,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:21:52,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:21:52,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:21:52,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:21:52,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:21:52,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:21:52,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:21:52,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:21:52,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:21:52,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:21:52,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:21:52,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:21:52,136 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:21:52,136 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:21:52,137 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:21:52,137 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:21:52,137 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:21:52,137 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:21:52,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:21:52,139 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:21:52,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:21:52,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:21:52,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:21:52,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:21:52,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:21:52,140 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:21:52,140 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:21:52,141 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:21:52,141 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:21:52,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:21:52,149 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:21:52,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:21:52,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:21:52,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:21:52,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:21:52,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:52,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:21:52,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:21:52,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:21:52,152 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:21:52,152 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:52,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:21:52,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:21:52,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:21:52,153 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-11-03 04:21:52,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:21:52,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:21:52,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:21:52,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:21:52,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:21:52,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-03 04:21:52,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/3e42d7c1e/d8629396723f426e99de539bb96273ce/FLAG79b06f5c9 [2021-11-03 04:21:53,770 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:21:53,779 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-03 04:21:53,818 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/3e42d7c1e/d8629396723f426e99de539bb96273ce/FLAG79b06f5c9 [2021-11-03 04:21:54,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/data/3e42d7c1e/d8629396723f426e99de539bb96273ce [2021-11-03 04:21:54,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:21:54,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:21:54,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:54,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:21:54,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:21:54,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:54,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d87d218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54, skipping insertion in model container [2021-11-03 04:21:54,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:54,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:21:54,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:54,908 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-03 04:21:55,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:55,386 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:21:55,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:55,435 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-03 04:21:55,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:55,597 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:21:55,634 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_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-03 04:21:55,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:55,801 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:21:55,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55 WrapperNode [2021-11-03 04:21:55,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:55,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:55,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:21:55,805 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:21:55,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:56,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:21:56,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:21:56,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:21:56,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:21:56,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:21:56,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:21:56,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:21:56,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:56,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:56,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:56,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:21:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:21:56,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:21:56,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:21:56,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:21:56,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:22:10,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:22:10,428 INFO L299 CfgBuilder]: Removed 881 assume(true) statements. [2021-11-03 04:22:10,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:22:10 BoogieIcfgContainer [2021-11-03 04:22:10,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:22:10,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:22:10,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:22:10,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:22:10,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:21:54" (1/3) ... [2021-11-03 04:22:10,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3896a86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:22:10, skipping insertion in model container [2021-11-03 04:22:10,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (2/3) ... [2021-11-03 04:22:10,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3896a86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:22:10, skipping insertion in model container [2021-11-03 04:22:10,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:22:10" (3/3) ... [2021-11-03 04:22:10,445 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2021-11-03 04:22:10,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:22:10,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:22:10,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:22:10,545 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 04:22:10,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:22:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 3675 states, 3669 states have (on average 1.8844371763423275) internal successors, (6914), 3674 states have internal predecessors, (6914), 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 04:22:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:22:10,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:10,684 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] [2021-11-03 04:22:10,685 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash -183688650, now seen corresponding path program 1 times [2021-11-03 04:22:10,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:10,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815570645] [2021-11-03 04:22:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:10,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:10,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:10,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:22:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:22:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:11,490 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 04:22:11,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:11,626 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 04:22:11,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:11,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815570645] [2021-11-03 04:22:11,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815570645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:11,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:11,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:22:11,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399254152] [2021-11-03 04:22:11,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:22:11,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:22:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:22:11,738 INFO L87 Difference]: Start difference. First operand has 3675 states, 3669 states have (on average 1.8844371763423275) internal successors, (6914), 3674 states have internal predecessors, (6914), 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 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 04:22:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:11,935 INFO L93 Difference]: Finished difference Result 3694 states and 6937 transitions. [2021-11-03 04:22:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:22:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 53 [2021-11-03 04:22:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:11,993 INFO L225 Difference]: With dead ends: 3694 [2021-11-03 04:22:11,994 INFO L226 Difference]: Without dead ends: 3671 [2021-11-03 04:22:12,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 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 04:22:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-11-03 04:22:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3671. [2021-11-03 04:22:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3666 states have (on average 1.8827059465357339) internal successors, (6902), 3670 states have internal predecessors, (6902), 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 04:22:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 6902 transitions. [2021-11-03 04:22:12,301 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 6902 transitions. Word has length 53 [2021-11-03 04:22:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:12,303 INFO L470 AbstractCegarLoop]: Abstraction has 3671 states and 6902 transitions. [2021-11-03 04:22:12,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 04:22:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 6902 transitions. [2021-11-03 04:22:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 04:22:12,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:12,315 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] [2021-11-03 04:22:12,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:12,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:12,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash -20779449, now seen corresponding path program 1 times [2021-11-03 04:22:12,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:12,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830895275] [2021-11-03 04:22:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:12,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:12,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:12,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:12,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:22:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:13,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:13,288 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 04:22:13,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:13,543 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 04:22:13,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:13,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830895275] [2021-11-03 04:22:13,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830895275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:13,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:13,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:22:13,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112445580] [2021-11-03 04:22:13,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:13,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:13,555 INFO L87 Difference]: Start difference. First operand 3671 states and 6902 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 04:22:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:14,338 INFO L93 Difference]: Finished difference Result 10933 states and 20563 transitions. [2021-11-03 04:22:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 55 [2021-11-03 04:22:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:14,405 INFO L225 Difference]: With dead ends: 10933 [2021-11-03 04:22:14,406 INFO L226 Difference]: Without dead ends: 7275 [2021-11-03 04:22:14,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 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 04:22:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7275 states. [2021-11-03 04:22:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7275 to 3671. [2021-11-03 04:22:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3666 states have (on average 1.880796508456083) internal successors, (6895), 3670 states have internal predecessors, (6895), 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 04:22:14,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 6895 transitions. [2021-11-03 04:22:14,779 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 6895 transitions. Word has length 55 [2021-11-03 04:22:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:14,780 INFO L470 AbstractCegarLoop]: Abstraction has 3671 states and 6895 transitions. [2021-11-03 04:22:14,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 04:22:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 6895 transitions. [2021-11-03 04:22:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:22:14,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:14,798 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, 1, 1, 1] [2021-11-03 04:22:14,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:15,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:15,022 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:15,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:15,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1712167708, now seen corresponding path program 1 times [2021-11-03 04:22:15,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:15,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729505918] [2021-11-03 04:22:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:15,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:15,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:15,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:15,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:22:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:15,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:22:15,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:15,765 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 04:22:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:15,996 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 04:22:15,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:15,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729505918] [2021-11-03 04:22:15,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729505918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:15,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:15,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:22:15,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177634111] [2021-11-03 04:22:15,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:15,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:16,001 INFO L87 Difference]: Start difference. First operand 3671 states and 6895 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 04:22:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:18,207 INFO L93 Difference]: Finished difference Result 25172 states and 47317 transitions. [2021-11-03 04:22:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:22:18,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 61 [2021-11-03 04:22:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:18,412 INFO L225 Difference]: With dead ends: 25172 [2021-11-03 04:22:18,412 INFO L226 Difference]: Without dead ends: 21523 [2021-11-03 04:22:18,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:22:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-11-03 04:22:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 3649. [2021-11-03 04:22:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3644 states have (on average 1.8781558726673984) internal successors, (6844), 3648 states have internal predecessors, (6844), 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 04:22:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 6844 transitions. [2021-11-03 04:22:18,998 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 6844 transitions. Word has length 61 [2021-11-03 04:22:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:18,999 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 6844 transitions. [2021-11-03 04:22:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 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 04:22:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 6844 transitions. [2021-11-03 04:22:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 04:22:19,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:19,008 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, 1, 1, 1, 1, 1] [2021-11-03 04:22:19,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:19,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:19,227 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash 669985797, now seen corresponding path program 1 times [2021-11-03 04:22:19,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:19,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125202954] [2021-11-03 04:22:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:19,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:19,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:19,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:22:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:19,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:20,030 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 04:22:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:20,257 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 04:22:20,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:20,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125202954] [2021-11-03 04:22:20,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125202954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:20,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:20,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:22:20,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333703766] [2021-11-03 04:22:20,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:20,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:20,262 INFO L87 Difference]: Start difference. First operand 3649 states and 6844 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 04:22:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:21,031 INFO L93 Difference]: Finished difference Result 10844 states and 20367 transitions. [2021-11-03 04:22:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 63 [2021-11-03 04:22:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:21,062 INFO L225 Difference]: With dead ends: 10844 [2021-11-03 04:22:21,062 INFO L226 Difference]: Without dead ends: 7217 [2021-11-03 04:22:21,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 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 04:22:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7217 states. [2021-11-03 04:22:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7217 to 3649. [2021-11-03 04:22:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3644 states have (on average 1.8751372118551042) internal successors, (6833), 3648 states have internal predecessors, (6833), 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 04:22:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 6833 transitions. [2021-11-03 04:22:21,541 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 6833 transitions. Word has length 63 [2021-11-03 04:22:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:21,542 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 6833 transitions. [2021-11-03 04:22:21,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 04:22:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 6833 transitions. [2021-11-03 04:22:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:22:21,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:21,550 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:21,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:21,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:21,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1538911142, now seen corresponding path program 1 times [2021-11-03 04:22:21,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:21,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729988118] [2021-11-03 04:22:21,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:21,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:21,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:21,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:22:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:22:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:22,715 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 04:22:22,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:23,012 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 04:22:23,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:23,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729988118] [2021-11-03 04:22:23,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729988118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:23,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:23,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:22:23,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738125379] [2021-11-03 04:22:23,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:23,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:23,016 INFO L87 Difference]: Start difference. First operand 3649 states and 6833 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 04:22:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:27,232 INFO L93 Difference]: Finished difference Result 39383 states and 73997 transitions. [2021-11-03 04:22:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:22:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 69 [2021-11-03 04:22:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:27,374 INFO L225 Difference]: With dead ends: 39383 [2021-11-03 04:22:27,374 INFO L226 Difference]: Without dead ends: 35759 [2021-11-03 04:22:27,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:22:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35759 states. [2021-11-03 04:22:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35759 to 3651. [2021-11-03 04:22:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3646 states have (on average 1.8732857926494788) internal successors, (6830), 3650 states have internal predecessors, (6830), 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 04:22:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 6830 transitions. [2021-11-03 04:22:27,920 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 6830 transitions. Word has length 69 [2021-11-03 04:22:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:27,921 INFO L470 AbstractCegarLoop]: Abstraction has 3651 states and 6830 transitions. [2021-11-03 04:22:27,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 04:22:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 6830 transitions. [2021-11-03 04:22:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:22:27,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:27,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:27,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:28,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:28,145 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1519808941, now seen corresponding path program 1 times [2021-11-03 04:22:28,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:28,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967233977] [2021-11-03 04:22:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:28,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:28,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:28,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:28,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:22:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:28,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:22:28,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:29,123 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 04:22:29,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:29,406 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 04:22:29,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:29,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967233977] [2021-11-03 04:22:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967233977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:29,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:29,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:22:29,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093777854] [2021-11-03 04:22:29,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:29,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:29,410 INFO L87 Difference]: Start difference. First operand 3651 states and 6830 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 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 04:22:32,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:32,736 INFO L93 Difference]: Finished difference Result 39351 states and 73918 transitions. [2021-11-03 04:22:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:22:32,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 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 71 [2021-11-03 04:22:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:32,852 INFO L225 Difference]: With dead ends: 39351 [2021-11-03 04:22:32,853 INFO L226 Difference]: Without dead ends: 35727 [2021-11-03 04:22:32,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:22:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35727 states. [2021-11-03 04:22:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35727 to 3655. [2021-11-03 04:22:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3650 states have (on average 1.872054794520548) internal successors, (6833), 3654 states have internal predecessors, (6833), 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 04:22:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 6833 transitions. [2021-11-03 04:22:33,347 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 6833 transitions. Word has length 71 [2021-11-03 04:22:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:33,348 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 6833 transitions. [2021-11-03 04:22:33,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 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 04:22:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 6833 transitions. [2021-11-03 04:22:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:22:33,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:33,354 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:33,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:33,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:33,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1434416934, now seen corresponding path program 1 times [2021-11-03 04:22:33,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:33,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443040363] [2021-11-03 04:22:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:33,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:33,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:33,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:33,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:22:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:34,596 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 04:22:34,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:34,807 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 04:22:34,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:34,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443040363] [2021-11-03 04:22:34,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443040363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:34,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:34,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:22:34,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623441129] [2021-11-03 04:22:34,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:34,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:34,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:34,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:34,810 INFO L87 Difference]: Start difference. First operand 3655 states and 6833 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 04:22:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:35,113 INFO L93 Difference]: Finished difference Result 7258 states and 13597 transitions. [2021-11-03 04:22:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:35,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 73 [2021-11-03 04:22:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:35,125 INFO L225 Difference]: With dead ends: 7258 [2021-11-03 04:22:35,125 INFO L226 Difference]: Without dead ends: 3634 [2021-11-03 04:22:35,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 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 04:22:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-11-03 04:22:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 3634. [2021-11-03 04:22:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3629 states have (on average 1.8724166437034997) internal successors, (6795), 3633 states have internal predecessors, (6795), 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 04:22:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 6795 transitions. [2021-11-03 04:22:35,398 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 6795 transitions. Word has length 73 [2021-11-03 04:22:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:35,399 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 6795 transitions. [2021-11-03 04:22:35,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 04:22:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 6795 transitions. [2021-11-03 04:22:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:22:35,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:35,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:35,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:35,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:35,636 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:35,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1696480974, now seen corresponding path program 1 times [2021-11-03 04:22:35,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:35,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137423017] [2021-11-03 04:22:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:35,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:35,645 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:35,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:22:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:36,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:22:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:36,521 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 04:22:36,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:36,742 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 04:22:36,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:36,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137423017] [2021-11-03 04:22:36,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137423017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:36,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:36,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:22:36,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626523675] [2021-11-03 04:22:36,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:36,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:36,746 INFO L87 Difference]: Start difference. First operand 3634 states and 6795 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 04:22:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:36,977 INFO L93 Difference]: Finished difference Result 7202 states and 13500 transitions. [2021-11-03 04:22:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:36,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 74 [2021-11-03 04:22:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:36,988 INFO L225 Difference]: With dead ends: 7202 [2021-11-03 04:22:36,988 INFO L226 Difference]: Without dead ends: 3609 [2021-11-03 04:22:36,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:22:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-11-03 04:22:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3609. [2021-11-03 04:22:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3604 states have (on average 1.8731964483906771) internal successors, (6751), 3608 states have internal predecessors, (6751), 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 04:22:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6751 transitions. [2021-11-03 04:22:37,502 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6751 transitions. Word has length 74 [2021-11-03 04:22:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:37,503 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 6751 transitions. [2021-11-03 04:22:37,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 04:22:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6751 transitions. [2021-11-03 04:22:37,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:22:37,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:37,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:37,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:37,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:37,732 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:37,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1958765303, now seen corresponding path program 1 times [2021-11-03 04:22:37,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:37,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239740584] [2021-11-03 04:22:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:37,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:37,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:37,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:22:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:38,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:38,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:38,572 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 04:22:38,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:38,775 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 04:22:38,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:38,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239740584] [2021-11-03 04:22:38,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239740584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:38,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:38,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:22:38,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024753307] [2021-11-03 04:22:38,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:38,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:38,784 INFO L87 Difference]: Start difference. First operand 3609 states and 6751 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 04:22:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:39,075 INFO L93 Difference]: Finished difference Result 7177 states and 13456 transitions. [2021-11-03 04:22:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 75 [2021-11-03 04:22:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:39,084 INFO L225 Difference]: With dead ends: 7177 [2021-11-03 04:22:39,084 INFO L226 Difference]: Without dead ends: 3606 [2021-11-03 04:22:39,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 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 04:22:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-11-03 04:22:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3606. [2021-11-03 04:22:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3601 states have (on average 1.8725354068314357) internal successors, (6743), 3605 states have internal predecessors, (6743), 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 04:22:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 6743 transitions. [2021-11-03 04:22:39,440 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 6743 transitions. Word has length 75 [2021-11-03 04:22:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:39,440 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 6743 transitions. [2021-11-03 04:22:39,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 04:22:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 6743 transitions. [2021-11-03 04:22:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:22:39,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:39,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:39,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:39,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:39,663 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:39,663 INFO L85 PathProgramCache]: Analyzing trace with hash 194041656, now seen corresponding path program 1 times [2021-11-03 04:22:39,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:39,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640226468] [2021-11-03 04:22:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:39,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:39,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:39,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:39,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:22:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:22:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:40,617 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 04:22:40,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:40,870 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 04:22:40,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:40,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640226468] [2021-11-03 04:22:40,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640226468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:40,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:40,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:22:40,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181809898] [2021-11-03 04:22:40,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:40,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:40,874 INFO L87 Difference]: Start difference. First operand 3606 states and 6743 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 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 04:22:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:41,321 INFO L93 Difference]: Finished difference Result 7168 states and 13438 transitions. [2021-11-03 04:22:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:22:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 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 76 [2021-11-03 04:22:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:41,326 INFO L225 Difference]: With dead ends: 7168 [2021-11-03 04:22:41,326 INFO L226 Difference]: Without dead ends: 3604 [2021-11-03 04:22:41,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:22:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-11-03 04:22:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3604. [2021-11-03 04:22:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3599 states have (on average 1.8719088635732148) internal successors, (6737), 3603 states have internal predecessors, (6737), 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 04:22:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 6737 transitions. [2021-11-03 04:22:41,570 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 6737 transitions. Word has length 76 [2021-11-03 04:22:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:41,571 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 6737 transitions. [2021-11-03 04:22:41,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 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 04:22:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 6737 transitions. [2021-11-03 04:22:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:22:41,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:41,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:41,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:41,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:41,793 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1134957956, now seen corresponding path program 1 times [2021-11-03 04:22:41,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:41,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704401895] [2021-11-03 04:22:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:41,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:41,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:41,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:41,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:22:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:22:42,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:42,755 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 04:22:42,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:43,013 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 04:22:43,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:43,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704401895] [2021-11-03 04:22:43,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704401895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:43,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:43,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:22:43,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711082067] [2021-11-03 04:22:43,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:22:43,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:22:43,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:43,016 INFO L87 Difference]: Start difference. First operand 3604 states and 6737 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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 04:22:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:43,394 INFO L93 Difference]: Finished difference Result 7161 states and 13423 transitions. [2021-11-03 04:22:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:22:43,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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 77 [2021-11-03 04:22:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:43,399 INFO L225 Difference]: With dead ends: 7161 [2021-11-03 04:22:43,400 INFO L226 Difference]: Without dead ends: 3602 [2021-11-03 04:22:43,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:22:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-11-03 04:22:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 3602. [2021-11-03 04:22:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3597 states have (on average 1.8712816235752014) internal successors, (6731), 3601 states have internal predecessors, (6731), 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 04:22:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 6731 transitions. [2021-11-03 04:22:43,724 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 6731 transitions. Word has length 77 [2021-11-03 04:22:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:43,724 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 6731 transitions. [2021-11-03 04:22:43,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 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 04:22:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 6731 transitions. [2021-11-03 04:22:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:22:43,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:43,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:43,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:43,946 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1149977565, now seen corresponding path program 1 times [2021-11-03 04:22:43,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:43,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158710121] [2021-11-03 04:22:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:43,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:43,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:43,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:22:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:22:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:45,021 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 04:22:45,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:45,383 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 04:22:45,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:45,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158710121] [2021-11-03 04:22:45,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158710121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:45,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:45,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:22:45,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409242138] [2021-11-03 04:22:45,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:45,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:45,386 INFO L87 Difference]: Start difference. First operand 3602 states and 6731 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 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 04:22:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:49,590 INFO L93 Difference]: Finished difference Result 12288 states and 23031 transitions. [2021-11-03 04:22:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:22:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 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 78 [2021-11-03 04:22:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:49,606 INFO L225 Difference]: With dead ends: 12288 [2021-11-03 04:22:49,606 INFO L226 Difference]: Without dead ends: 8737 [2021-11-03 04:22:49,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-11-03 04:22:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 3602. [2021-11-03 04:22:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3597 states have (on average 1.8073394495412844) internal successors, (6501), 3601 states have internal predecessors, (6501), 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 04:22:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 6501 transitions. [2021-11-03 04:22:50,044 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 6501 transitions. Word has length 78 [2021-11-03 04:22:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:50,044 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 6501 transitions. [2021-11-03 04:22:50,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 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 04:22:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 6501 transitions. [2021-11-03 04:22:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:22:50,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:50,049 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, 1, 1, 1, 1, 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 04:22:50,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:50,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:50,269 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1298731663, now seen corresponding path program 1 times [2021-11-03 04:22:50,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:50,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277810790] [2021-11-03 04:22:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:50,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:50,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:50,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:22:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:51,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:22:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:51,407 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 04:22:51,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:51,690 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 04:22:51,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:51,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277810790] [2021-11-03 04:22:51,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277810790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:51,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:51,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:22:51,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418127481] [2021-11-03 04:22:51,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:51,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:51,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:51,692 INFO L87 Difference]: Start difference. First operand 3602 states and 6501 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 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 04:22:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:53,968 INFO L93 Difference]: Finished difference Result 9696 states and 17707 transitions. [2021-11-03 04:22:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:22:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2021-11-03 04:22:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:53,977 INFO L225 Difference]: With dead ends: 9696 [2021-11-03 04:22:53,977 INFO L226 Difference]: Without dead ends: 6172 [2021-11-03 04:22:53,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 04:22:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6172 states. [2021-11-03 04:22:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6172 to 3550. [2021-11-03 04:22:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3545 states have (on average 1.8078984485190408) internal successors, (6409), 3549 states have internal predecessors, (6409), 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 04:22:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 6409 transitions. [2021-11-03 04:22:54,309 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 6409 transitions. Word has length 86 [2021-11-03 04:22:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:54,309 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 6409 transitions. [2021-11-03 04:22:54,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 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 04:22:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 6409 transitions. [2021-11-03 04:22:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 04:22:54,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:54,314 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, 1, 1, 1, 1, 1, 1, 1, 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 04:22:54,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:54,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:54,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:22:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 176451932, now seen corresponding path program 1 times [2021-11-03 04:22:54,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:54,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947865604] [2021-11-03 04:22:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:54,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:54,532 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:54,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:22:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:55,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:22:55,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:56,040 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 04:22:56,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:58,369 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 04:22:58,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:58,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947865604] [2021-11-03 04:22:58,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947865604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:58,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:58,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:22:58,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725591727] [2021-11-03 04:22:58,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:58,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:58,372 INFO L87 Difference]: Start difference. First operand 3550 states and 6409 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 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 04:23:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:01,892 INFO L93 Difference]: Finished difference Result 11251 states and 20451 transitions. [2021-11-03 04:23:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:23:01,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 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 89 [2021-11-03 04:23:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:01,907 INFO L225 Difference]: With dead ends: 11251 [2021-11-03 04:23:01,908 INFO L226 Difference]: Without dead ends: 7771 [2021-11-03 04:23:01,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:23:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-11-03 04:23:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 5067. [2021-11-03 04:23:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5062 states have (on average 1.807190833662584) internal successors, (9148), 5066 states have internal predecessors, (9148), 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 04:23:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 9148 transitions. [2021-11-03 04:23:02,292 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 9148 transitions. Word has length 89 [2021-11-03 04:23:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:02,293 INFO L470 AbstractCegarLoop]: Abstraction has 5067 states and 9148 transitions. [2021-11-03 04:23:02,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 5 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 04:23:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 9148 transitions. [2021-11-03 04:23:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-03 04:23:02,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:02,296 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:02,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:02,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:02,502 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash 780932315, now seen corresponding path program 1 times [2021-11-03 04:23:02,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:02,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96148804] [2021-11-03 04:23:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:02,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:02,505 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:02,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:23:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:03,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:23:03,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:03,774 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 04:23:03,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:04,107 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 04:23:04,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:04,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96148804] [2021-11-03 04:23:04,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96148804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:04,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:04,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:23:04,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287170345] [2021-11-03 04:23:04,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:23:04,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:23:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:23:04,110 INFO L87 Difference]: Start difference. First operand 5067 states and 9148 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 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 04:23:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:08,875 INFO L93 Difference]: Finished difference Result 20068 states and 36549 transitions. [2021-11-03 04:23:08,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:23:08,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 90 [2021-11-03 04:23:08,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:08,899 INFO L225 Difference]: With dead ends: 20068 [2021-11-03 04:23:08,899 INFO L226 Difference]: Without dead ends: 15070 [2021-11-03 04:23:08,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:23:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15070 states. [2021-11-03 04:23:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15070 to 5073. [2021-11-03 04:23:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5068 states have (on average 1.8062352012628256) internal successors, (9154), 5072 states have internal predecessors, (9154), 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 04:23:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 9154 transitions. [2021-11-03 04:23:09,377 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 9154 transitions. Word has length 90 [2021-11-03 04:23:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:09,377 INFO L470 AbstractCegarLoop]: Abstraction has 5073 states and 9154 transitions. [2021-11-03 04:23:09,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 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 04:23:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 9154 transitions. [2021-11-03 04:23:09,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-03 04:23:09,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:09,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:09,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:23:09,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:09,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:09,602 INFO L85 PathProgramCache]: Analyzing trace with hash 383808506, now seen corresponding path program 1 times [2021-11-03 04:23:09,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:09,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558934696] [2021-11-03 04:23:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:09,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:09,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:09,605 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:09,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:23:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:23:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:10,885 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 04:23:10,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:11,192 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 04:23:11,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:11,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558934696] [2021-11-03 04:23:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558934696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:11,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:11,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:23:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791805068] [2021-11-03 04:23:11,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:23:11,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:23:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:23:11,194 INFO L87 Difference]: Start difference. First operand 5073 states and 9154 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 04:23:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:15,489 INFO L93 Difference]: Finished difference Result 14509 states and 26408 transitions. [2021-11-03 04:23:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:23:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2021-11-03 04:23:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:15,502 INFO L225 Difference]: With dead ends: 14509 [2021-11-03 04:23:15,502 INFO L226 Difference]: Without dead ends: 9492 [2021-11-03 04:23:15,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:23:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9492 states. [2021-11-03 04:23:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9492 to 6671. [2021-11-03 04:23:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6666 states have (on average 1.7662766276627664) internal successors, (11774), 6670 states have internal predecessors, (11774), 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 04:23:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 11774 transitions. [2021-11-03 04:23:16,107 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 11774 transitions. Word has length 91 [2021-11-03 04:23:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:16,108 INFO L470 AbstractCegarLoop]: Abstraction has 6671 states and 11774 transitions. [2021-11-03 04:23:16,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 04:23:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 11774 transitions. [2021-11-03 04:23:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 04:23:16,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:16,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:16,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:16,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:16,326 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:16,326 INFO L85 PathProgramCache]: Analyzing trace with hash 512488434, now seen corresponding path program 1 times [2021-11-03 04:23:16,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:16,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783093029] [2021-11-03 04:23:16,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:16,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:16,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:16,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:23:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:23:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:17,666 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 04:23:17,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:17,973 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 04:23:17,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:17,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783093029] [2021-11-03 04:23:17,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783093029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:17,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:17,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:23:17,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276263055] [2021-11-03 04:23:17,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:23:17,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:23:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:23:17,977 INFO L87 Difference]: Start difference. First operand 6671 states and 11774 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 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 04:23:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:21,480 INFO L93 Difference]: Finished difference Result 44414 states and 79006 transitions. [2021-11-03 04:23:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:23:21,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 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 93 [2021-11-03 04:23:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:21,532 INFO L225 Difference]: With dead ends: 44414 [2021-11-03 04:23:21,532 INFO L226 Difference]: Without dead ends: 37808 [2021-11-03 04:23:21,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:23:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37808 states. [2021-11-03 04:23:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37808 to 10246. [2021-11-03 04:23:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10246 states, 10241 states have (on average 1.776193731080949) internal successors, (18190), 10245 states have internal predecessors, (18190), 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 04:23:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10246 states to 10246 states and 18190 transitions. [2021-11-03 04:23:22,546 INFO L78 Accepts]: Start accepts. Automaton has 10246 states and 18190 transitions. Word has length 93 [2021-11-03 04:23:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:22,546 INFO L470 AbstractCegarLoop]: Abstraction has 10246 states and 18190 transitions. [2021-11-03 04:23:22,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 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 04:23:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 10246 states and 18190 transitions. [2021-11-03 04:23:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 04:23:22,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:22,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:22,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:22,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:22,750 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 440101876, now seen corresponding path program 1 times [2021-11-03 04:23:22,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:22,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113051801] [2021-11-03 04:23:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:22,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:22,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:22,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:22,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:23:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:23:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:24,269 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 04:23:24,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:24,603 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 04:23:24,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:24,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113051801] [2021-11-03 04:23:24,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113051801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:24,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:24,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:23:24,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398759703] [2021-11-03 04:23:24,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:23:24,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:24,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:23:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:23:24,606 INFO L87 Difference]: Start difference. First operand 10246 states and 18190 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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 04:23:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:27,357 INFO L93 Difference]: Finished difference Result 21489 states and 38274 transitions. [2021-11-03 04:23:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:23:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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 93 [2021-11-03 04:23:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:27,377 INFO L225 Difference]: With dead ends: 21489 [2021-11-03 04:23:27,377 INFO L226 Difference]: Without dead ends: 16078 [2021-11-03 04:23:27,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:23:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16078 states. [2021-11-03 04:23:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16078 to 10232. [2021-11-03 04:23:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10232 states, 10227 states have (on average 1.7758873569961866) internal successors, (18162), 10231 states have internal predecessors, (18162), 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 04:23:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10232 states to 10232 states and 18162 transitions. [2021-11-03 04:23:28,243 INFO L78 Accepts]: Start accepts. Automaton has 10232 states and 18162 transitions. Word has length 93 [2021-11-03 04:23:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:28,243 INFO L470 AbstractCegarLoop]: Abstraction has 10232 states and 18162 transitions. [2021-11-03 04:23:28,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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 04:23:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10232 states and 18162 transitions. [2021-11-03 04:23:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-03 04:23:28,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:28,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:28,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:28,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:28,447 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -919907074, now seen corresponding path program 1 times [2021-11-03 04:23:28,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:28,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140230239] [2021-11-03 04:23:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:28,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:28,450 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:28,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:23:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:29,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:23:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:29,827 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 04:23:29,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:30,211 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 04:23:30,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:30,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140230239] [2021-11-03 04:23:30,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140230239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:30,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:30,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:23:30,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534747970] [2021-11-03 04:23:30,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:23:30,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:23:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:23:30,213 INFO L87 Difference]: Start difference. First operand 10232 states and 18162 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 04:23:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:31,703 INFO L93 Difference]: Finished difference Result 25648 states and 45550 transitions. [2021-11-03 04:23:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:23:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 100 [2021-11-03 04:23:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:31,725 INFO L225 Difference]: With dead ends: 25648 [2021-11-03 04:23:31,725 INFO L226 Difference]: Without dead ends: 17281 [2021-11-03 04:23:31,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:23:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17281 states. [2021-11-03 04:23:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17281 to 17266. [2021-11-03 04:23:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17266 states, 17261 states have (on average 1.7826892995770813) internal successors, (30771), 17265 states have internal predecessors, (30771), 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 04:23:33,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17266 states to 17266 states and 30771 transitions. [2021-11-03 04:23:33,274 INFO L78 Accepts]: Start accepts. Automaton has 17266 states and 30771 transitions. Word has length 100 [2021-11-03 04:23:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:33,275 INFO L470 AbstractCegarLoop]: Abstraction has 17266 states and 30771 transitions. [2021-11-03 04:23:33,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 04:23:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 17266 states and 30771 transitions. [2021-11-03 04:23:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 04:23:33,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:33,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:33,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:33,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:33,478 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:33,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1477105537, now seen corresponding path program 1 times [2021-11-03 04:23:33,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:33,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200708777] [2021-11-03 04:23:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:33,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:33,481 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:33,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:23:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:34,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:23:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:35,049 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 04:23:35,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:35,379 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 04:23:35,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:35,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200708777] [2021-11-03 04:23:35,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200708777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:35,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:35,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:23:35,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923516170] [2021-11-03 04:23:35,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:23:35,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:35,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:23:35,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:23:35,381 INFO L87 Difference]: Start difference. First operand 17266 states and 30771 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 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 04:23:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:38,274 INFO L93 Difference]: Finished difference Result 45482 states and 80995 transitions. [2021-11-03 04:23:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:23:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 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 101 [2021-11-03 04:23:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:38,317 INFO L225 Difference]: With dead ends: 45482 [2021-11-03 04:23:38,317 INFO L226 Difference]: Without dead ends: 31153 [2021-11-03 04:23:38,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:23:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31153 states. [2021-11-03 04:23:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31153 to 31138. [2021-11-03 04:23:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31138 states, 31133 states have (on average 1.7861112003340507) internal successors, (55607), 31137 states have internal predecessors, (55607), 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 04:23:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31138 states to 31138 states and 55607 transitions. [2021-11-03 04:23:41,138 INFO L78 Accepts]: Start accepts. Automaton has 31138 states and 55607 transitions. Word has length 101 [2021-11-03 04:23:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:41,139 INFO L470 AbstractCegarLoop]: Abstraction has 31138 states and 55607 transitions. [2021-11-03 04:23:41,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 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 04:23:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand 31138 states and 55607 transitions. [2021-11-03 04:23:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-03 04:23:41,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:41,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:41,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:41,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:41,342 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1859948615, now seen corresponding path program 1 times [2021-11-03 04:23:41,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:41,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9194736] [2021-11-03 04:23:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:41,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:41,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:41,346 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:41,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:23:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:23:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:42,988 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 04:23:42,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:43,310 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 04:23:43,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:43,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9194736] [2021-11-03 04:23:43,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9194736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:43,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:43,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:23:43,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461425852] [2021-11-03 04:23:43,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:23:43,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:23:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:23:43,312 INFO L87 Difference]: Start difference. First operand 31138 states and 55607 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 04:23:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:48,510 INFO L93 Difference]: Finished difference Result 84758 states and 151084 transitions. [2021-11-03 04:23:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:23:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 04:23:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:48,601 INFO L225 Difference]: With dead ends: 84758 [2021-11-03 04:23:48,602 INFO L226 Difference]: Without dead ends: 58485 [2021-11-03 04:23:48,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:23:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58485 states. [2021-11-03 04:23:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58485 to 58470. [2021-11-03 04:23:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58470 states, 58465 states have (on average 1.7864876421790814) internal successors, (104447), 58469 states have internal predecessors, (104447), 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 04:23:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58470 states to 58470 states and 104447 transitions. [2021-11-03 04:23:54,201 INFO L78 Accepts]: Start accepts. Automaton has 58470 states and 104447 transitions. Word has length 102 [2021-11-03 04:23:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:54,201 INFO L470 AbstractCegarLoop]: Abstraction has 58470 states and 104447 transitions. [2021-11-03 04:23:54,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 04:23:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 58470 states and 104447 transitions. [2021-11-03 04:23:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-03 04:23:54,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:54,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:54,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:54,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:54,405 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:23:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:54,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1730521308, now seen corresponding path program 1 times [2021-11-03 04:23:54,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:54,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703922607] [2021-11-03 04:23:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:54,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:54,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:54,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84dc28a3-c4c4-4e61-a71f-b58ccce840ed/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:23:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:23:55,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:55,984 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 04:23:55,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:56,332 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 04:23:56,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:56,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703922607] [2021-11-03 04:23:56,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703922607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:56,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:56,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:23:56,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025073460] [2021-11-03 04:23:56,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:23:56,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:23:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:23:56,334 INFO L87 Difference]: Start difference. First operand 58470 states and 104447 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 04:24:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:06,401 INFO L93 Difference]: Finished difference Result 162486 states and 289517 transitions. [2021-11-03 04:24:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:24:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 103 [2021-11-03 04:24:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:06,611 INFO L225 Difference]: With dead ends: 162486 [2021-11-03 04:24:06,611 INFO L226 Difference]: Without dead ends: 112305 [2021-11-03 04:24:06,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:24:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112305 states.