./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8 --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 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:04:31,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:04:31,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:04:31,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:04:31,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:04:31,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:04:31,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:04:31,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:04:31,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:04:31,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:04:31,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:04:31,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:04:31,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:04:31,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:04:31,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:04:31,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:04:31,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:04:31,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:04:31,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:04:31,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:04:31,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:04:31,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:04:31,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:04:31,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:04:31,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:04:31,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:04:31,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:04:31,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:04:31,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:04:31,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:04:31,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:04:31,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:04:31,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:04:31,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:04:31,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:04:31,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:04:31,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:04:31,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:04:31,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:04:31,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:04:31,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:04:31,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:04:31,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:04:31,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:04:31,964 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:04:31,964 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:04:31,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:04:31,965 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:04:31,965 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:04:31,965 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:04:31,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:04:31,965 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:04:31,966 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:04:31,966 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:04:31,966 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:04:31,966 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:04:31,967 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:04:31,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:04:31,968 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:04:31,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:04:31,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:04:31,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:04:31,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:04:31,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:04:31,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:04:31,969 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:04:31,969 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:04:31,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:04:31,970 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:04:31,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:04:31,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:04:31,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:04:31,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:04:31,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:04:31,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:04:31,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:04:31,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:04:31,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:04:31,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:04:31,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:04:31,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:04:31,972 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_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 [2021-11-07 01:04:32,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:04:32,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:04:32,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:04:32,336 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:04:32,336 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:04:32,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-07 01:04:32,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/189708339/e3f567bbed754ce5ac95dd0ad00827c8/FLAG0d4b5a7af [2021-11-07 01:04:33,184 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:04:33,187 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-07 01:04:33,227 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/189708339/e3f567bbed754ce5ac95dd0ad00827c8/FLAG0d4b5a7af [2021-11-07 01:04:33,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/189708339/e3f567bbed754ce5ac95dd0ad00827c8 [2021-11-07 01:04:33,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:04:33,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:04:33,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:33,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:04:33,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:04:33,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:33" (1/1) ... [2021-11-07 01:04:33,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9796bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:33, skipping insertion in model container [2021-11-07 01:04:33,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:33" (1/1) ... [2021-11-07 01:04:33,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:04:33,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:04:33,707 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_45109158-f1aa-4004-8575-1ccdb20faa29/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-07 01:04:34,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:34,123 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) [2021-11-07 01:04:34,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3016eeb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:34, skipping insertion in model container [2021-11-07 01:04:34,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:34,125 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:04:34,127 INFO L168 Benchmark]: Toolchain (without parser) took 804.24 ms. Allocated memory is still 107.0 MB. Free memory was 84.1 MB in the beginning and 67.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:04:34,128 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 79.7 MB. Free memory was 59.2 MB in the beginning and 59.1 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:04:34,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 800.93 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 67.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:04:34,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 79.7 MB. Free memory was 59.2 MB in the beginning and 59.1 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 800.93 ms. Allocated memory is still 107.0 MB. Free memory was 83.8 MB in the beginning and 67.1 MB in the end (delta: 16.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2804]: 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_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8 --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 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:04:36,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:04:36,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:04:36,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:04:36,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:04:36,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:04:36,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:04:36,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:04:36,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:04:36,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:04:36,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:04:36,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:04:36,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:04:36,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:04:36,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:04:36,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:04:36,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:04:36,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:04:36,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:04:36,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:04:36,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:04:36,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:04:36,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:04:36,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:04:36,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:04:36,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:04:36,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:04:36,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:04:36,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:04:36,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:04:36,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:04:36,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:04:36,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:04:36,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:04:36,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:04:36,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:04:36,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:04:36,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:04:36,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:04:36,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:04:36,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:04:36,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:04:36,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:04:36,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:04:36,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:04:36,827 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:04:36,827 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:04:36,827 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:04:36,828 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:04:36,828 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:04:36,829 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:04:36,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:04:36,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:04:36,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:04:36,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:04:36,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:04:36,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:04:36,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:04:36,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:04:36,834 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:04:36,834 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:04:36,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:04:36,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:04:36,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:04:36,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:04:36,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:04:36,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:04:36,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:04:36,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:04:36,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:04:36,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:04:36,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:04:36,838 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:04:36,838 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:36,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:04:36,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:04:36,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:04:36,839 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_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 [2021-11-07 01:04:37,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:04:37,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:04:37,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:04:37,366 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:04:37,371 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:04:37,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-07 01:04:37,458 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/3ef130617/02c9b861126d44fca874dde3ff5a4d29/FLAG0ddf8e48e [2021-11-07 01:04:38,334 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:04:38,339 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2021-11-07 01:04:38,371 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/3ef130617/02c9b861126d44fca874dde3ff5a4d29/FLAG0ddf8e48e [2021-11-07 01:04:38,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/data/3ef130617/02c9b861126d44fca874dde3ff5a4d29 [2021-11-07 01:04:38,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:04:38,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:04:38,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:38,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:04:38,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:04:38,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:38" (1/1) ... [2021-11-07 01:04:38,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567721ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:38, skipping insertion in model container [2021-11-07 01:04:38,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:38" (1/1) ... [2021-11-07 01:04:38,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:04:38,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:04:38,847 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_45109158-f1aa-4004-8575-1ccdb20faa29/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-07 01:04:39,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:39,328 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:04:39,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:04:39,367 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_45109158-f1aa-4004-8575-1ccdb20faa29/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-07 01:04:39,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:39,501 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:04:39,521 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_45109158-f1aa-4004-8575-1ccdb20faa29/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2021-11-07 01:04:39,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:39,676 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:04:39,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39 WrapperNode [2021-11-07 01:04:39,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:39,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:04:39,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:04:39,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:04:39,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:39,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:04:40,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:04:40,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:04:40,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:04:40,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:04:40,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:04:40,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:04:40,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:04:40,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (1/1) ... [2021-11-07 01:04:40,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:04:40,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:04:40,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:04:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:04:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:04:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:04:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:04:40,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:04:53,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:04:53,725 INFO L299 CfgBuilder]: Removed 881 assume(true) statements. [2021-11-07 01:04:53,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:53 BoogieIcfgContainer [2021-11-07 01:04:53,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:04:53,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:04:53,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:04:53,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:04:53,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:38" (1/3) ... [2021-11-07 01:04:53,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594ebc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:53, skipping insertion in model container [2021-11-07 01:04:53,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:39" (2/3) ... [2021-11-07 01:04:53,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594ebc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:53, skipping insertion in model container [2021-11-07 01:04:53,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:53" (3/3) ... [2021-11-07 01:04:53,741 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product31.cil.c [2021-11-07 01:04:53,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:04:53,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:04:53,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:04:53,820 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 [2021-11-07 01:04:53,820 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:04:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 3676 states, 3670 states have (on average 1.8869209809264305) internal successors, (6925), 3675 states have internal predecessors, (6925), 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) [2021-11-07 01:04:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:04:53,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:53,936 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] [2021-11-07 01:04:53,937 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)] === [2021-11-07 01:04:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash -481518765, now seen corresponding path program 1 times [2021-11-07 01:04:53,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:53,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532806002] [2021-11-07 01:04:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:53,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:53,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:54,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:04:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:04:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:54,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:54,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:54,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532806002] [2021-11-07 01:04:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532806002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:54,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:54,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:04:54,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027146507] [2021-11-07 01:04:54,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:04:54,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:04:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:04:54,884 INFO L87 Difference]: Start difference. First operand has 3676 states, 3670 states have (on average 1.8869209809264305) internal successors, (6925), 3675 states have internal predecessors, (6925), 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 21.5) internal successors, (43), 2 states have internal predecessors, (43), 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) [2021-11-07 01:04:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:55,061 INFO L93 Difference]: Finished difference Result 3695 states and 6948 transitions. [2021-11-07 01:04:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:04:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 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 43 [2021-11-07 01:04:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:55,117 INFO L225 Difference]: With dead ends: 3695 [2021-11-07 01:04:55,117 INFO L226 Difference]: Without dead ends: 3672 [2021-11-07 01:04:55,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:04:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-07 01:04:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3672. [2021-11-07 01:04:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3667 states have (on average 1.8851922552495228) internal successors, (6913), 3671 states have internal predecessors, (6913), 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) [2021-11-07 01:04:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 6913 transitions. [2021-11-07 01:04:55,395 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 6913 transitions. Word has length 43 [2021-11-07 01:04:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:55,396 INFO L470 AbstractCegarLoop]: Abstraction has 3672 states and 6913 transitions. [2021-11-07 01:04:55,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 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) [2021-11-07 01:04:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 6913 transitions. [2021-11-07 01:04:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:04:55,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:55,402 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] [2021-11-07 01:04:55,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:55,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:55,620 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)] === [2021-11-07 01:04:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash 850488898, now seen corresponding path program 1 times [2021-11-07 01:04:55,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:55,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831261055] [2021-11-07 01:04:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:55,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:55,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:55,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:55,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:04:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:04:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:56,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:56,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:56,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831261055] [2021-11-07 01:04:56,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831261055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:56,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:56,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:56,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973934250] [2021-11-07 01:04:56,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:56,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:56,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:56,358 INFO L87 Difference]: Start difference. First operand 3672 states and 6913 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-07 01:04:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:56,677 INFO L93 Difference]: Finished difference Result 7331 states and 13807 transitions. [2021-11-07 01:04:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:56,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 45 [2021-11-07 01:04:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:56,708 INFO L225 Difference]: With dead ends: 7331 [2021-11-07 01:04:56,708 INFO L226 Difference]: Without dead ends: 3672 [2021-11-07 01:04:56,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-11-07 01:04:56,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3672. [2021-11-07 01:04:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3667 states have (on average 1.8835560403599674) internal successors, (6907), 3671 states have internal predecessors, (6907), 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) [2021-11-07 01:04:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 6907 transitions. [2021-11-07 01:04:56,863 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 6907 transitions. Word has length 45 [2021-11-07 01:04:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:56,864 INFO L470 AbstractCegarLoop]: Abstraction has 3672 states and 6907 transitions. [2021-11-07 01:04:56,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2021-11-07 01:04:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 6907 transitions. [2021-11-07 01:04:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:04:56,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:56,881 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] [2021-11-07 01:04:56,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:57,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:57,099 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)] === [2021-11-07 01:04:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash -900077320, now seen corresponding path program 1 times [2021-11-07 01:04:57,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:57,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364323542] [2021-11-07 01:04:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:57,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:57,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:57,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:04:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:57,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:57,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:57,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364323542] [2021-11-07 01:04:57,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364323542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:57,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:57,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:04:57,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866010776] [2021-11-07 01:04:57,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:57,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:57,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:57,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:57,849 INFO L87 Difference]: Start difference. First operand 3672 states and 6907 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-11-07 01:04:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:58,161 INFO L93 Difference]: Finished difference Result 7295 states and 13730 transitions. [2021-11-07 01:04:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:58,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 50 [2021-11-07 01:04:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:58,190 INFO L225 Difference]: With dead ends: 7295 [2021-11-07 01:04:58,190 INFO L226 Difference]: Without dead ends: 3645 [2021-11-07 01:04:58,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:04:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2021-11-07 01:04:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2021-11-07 01:04:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3640 states have (on average 1.8821428571428571) internal successors, (6851), 3644 states have internal predecessors, (6851), 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) [2021-11-07 01:04:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6851 transitions. [2021-11-07 01:04:58,374 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6851 transitions. Word has length 50 [2021-11-07 01:04:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:58,375 INFO L470 AbstractCegarLoop]: Abstraction has 3645 states and 6851 transitions. [2021-11-07 01:04:58,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-11-07 01:04:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6851 transitions. [2021-11-07 01:04:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:04:58,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:58,381 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] [2021-11-07 01:04:58,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:58,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:58,595 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)] === [2021-11-07 01:04:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1722261270, now seen corresponding path program 1 times [2021-11-07 01:04:58,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:58,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511402075] [2021-11-07 01:04:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:58,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:58,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:58,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:58,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:04:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:59,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:04:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:59,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:59,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:59,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511402075] [2021-11-07 01:04:59,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511402075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:59,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:59,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:59,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564678062] [2021-11-07 01:04:59,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:59,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:59,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:59,385 INFO L87 Difference]: Start difference. First operand 3645 states and 6851 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-07 01:04:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:59,692 INFO L93 Difference]: Finished difference Result 7268 states and 13674 transitions. [2021-11-07 01:04:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 51 [2021-11-07 01:04:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:59,718 INFO L225 Difference]: With dead ends: 7268 [2021-11-07 01:04:59,719 INFO L226 Difference]: Without dead ends: 3645 [2021-11-07 01:04:59,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2021-11-07 01:04:59,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3645. [2021-11-07 01:04:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3640 states have (on average 1.8804945054945055) internal successors, (6845), 3644 states have internal predecessors, (6845), 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) [2021-11-07 01:04:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 6845 transitions. [2021-11-07 01:04:59,937 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 6845 transitions. Word has length 51 [2021-11-07 01:04:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:59,940 INFO L470 AbstractCegarLoop]: Abstraction has 3645 states and 6845 transitions. [2021-11-07 01:04:59,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2021-11-07 01:04:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 6845 transitions. [2021-11-07 01:04:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:04:59,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:59,945 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:59,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:00,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,159 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)] === [2021-11-07 01:05:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1457548773, now seen corresponding path program 1 times [2021-11-07 01:05:00,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:00,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562423748] [2021-11-07 01:05:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:00,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:00,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:00,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:05:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:00,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:05:00,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:00,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:01,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:01,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562423748] [2021-11-07 01:05:01,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562423748] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:01,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:01,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:05:01,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269301681] [2021-11-07 01:05:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:05:01,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:05:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:05:01,087 INFO L87 Difference]: Start difference. First operand 3645 states and 6845 transitions. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2021-11-07 01:05:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:01,413 INFO L93 Difference]: Finished difference Result 7262 states and 13657 transitions. [2021-11-07 01:05:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:05:01,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:05:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:01,439 INFO L225 Difference]: With dead ends: 7262 [2021-11-07 01:05:01,439 INFO L226 Difference]: Without dead ends: 3642 [2021-11-07 01:05:01,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:05:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2021-11-07 01:05:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3642. [2021-11-07 01:05:01,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3637 states have (on average 1.8798460269452846) internal successors, (6837), 3641 states have internal predecessors, (6837), 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) [2021-11-07 01:05:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 6837 transitions. [2021-11-07 01:05:01,679 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 6837 transitions. Word has length 56 [2021-11-07 01:05:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:01,680 INFO L470 AbstractCegarLoop]: Abstraction has 3642 states and 6837 transitions. [2021-11-07 01:05:01,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 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) [2021-11-07 01:05:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 6837 transitions. [2021-11-07 01:05:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:05:01,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:01,685 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] [2021-11-07 01:05:01,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:01,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:01,903 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)] === [2021-11-07 01:05:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -880308715, now seen corresponding path program 1 times [2021-11-07 01:05:01,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:01,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161261769] [2021-11-07 01:05:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:01,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:01,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:01,907 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:01,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:05:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:02,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:02,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:02,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:02,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161261769] [2021-11-07 01:05:02,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161261769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:02,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:02,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:05:02,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486718579] [2021-11-07 01:05:02,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:05:02,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:05:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:02,916 INFO L87 Difference]: Start difference. First operand 3642 states and 6837 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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) [2021-11-07 01:05:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:07,517 INFO L93 Difference]: Finished difference Result 12508 states and 23515 transitions. [2021-11-07 01:05:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:05:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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 57 [2021-11-07 01:05:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:07,578 INFO L225 Difference]: With dead ends: 12508 [2021-11-07 01:05:07,579 INFO L226 Difference]: Without dead ends: 8897 [2021-11-07 01:05:07,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:05:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8897 states. [2021-11-07 01:05:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8897 to 3642. [2021-11-07 01:05:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3637 states have (on average 1.8166070937585923) internal successors, (6607), 3641 states have internal predecessors, (6607), 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) [2021-11-07 01:05:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 6607 transitions. [2021-11-07 01:05:07,838 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 6607 transitions. Word has length 57 [2021-11-07 01:05:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:07,840 INFO L470 AbstractCegarLoop]: Abstraction has 3642 states and 6607 transitions. [2021-11-07 01:05:07,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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) [2021-11-07 01:05:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 6607 transitions. [2021-11-07 01:05:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:05:07,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:07,844 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] [2021-11-07 01:05:07,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:08,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:08,067 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)] === [2021-11-07 01:05:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:08,072 INFO L85 PathProgramCache]: Analyzing trace with hash 739298729, now seen corresponding path program 1 times [2021-11-07 01:05:08,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:08,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982206473] [2021-11-07 01:05:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:08,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:08,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:08,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:05:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:05:08,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:08,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:09,170 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:09,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982206473] [2021-11-07 01:05:09,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982206473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:09,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:09,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:05:09,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401506382] [2021-11-07 01:05:09,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:05:09,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:09,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:05:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:09,172 INFO L87 Difference]: Start difference. First operand 3642 states and 6607 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-07 01:05:11,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:11,355 INFO L93 Difference]: Finished difference Result 9856 states and 18065 transitions. [2021-11-07 01:05:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:05:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-11-07 01:05:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:11,375 INFO L225 Difference]: With dead ends: 9856 [2021-11-07 01:05:11,375 INFO L226 Difference]: Without dead ends: 6272 [2021-11-07 01:05:11,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:05:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2021-11-07 01:05:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 3590. [2021-11-07 01:05:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 3585 states have (on average 1.8172942817294282) internal successors, (6515), 3589 states have internal predecessors, (6515), 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) [2021-11-07 01:05:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 6515 transitions. [2021-11-07 01:05:11,607 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 6515 transitions. Word has length 65 [2021-11-07 01:05:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:11,607 INFO L470 AbstractCegarLoop]: Abstraction has 3590 states and 6515 transitions. [2021-11-07 01:05:11,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-07 01:05:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 6515 transitions. [2021-11-07 01:05:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:05:11,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:11,611 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] [2021-11-07 01:05:11,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:11,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:11,827 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)] === [2021-11-07 01:05:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash -537172046, now seen corresponding path program 1 times [2021-11-07 01:05:11,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:11,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603202494] [2021-11-07 01:05:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:11,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:11,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:11,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:11,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:05:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:05:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:12,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:14,228 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:14,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603202494] [2021-11-07 01:05:14,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603202494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:14,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:14,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:05:14,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543206491] [2021-11-07 01:05:14,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:05:14,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:14,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:05:14,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:14,231 INFO L87 Difference]: Start difference. First operand 3590 states and 6515 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 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) [2021-11-07 01:05:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:17,405 INFO L93 Difference]: Finished difference Result 11441 states and 20872 transitions. [2021-11-07 01:05:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:05:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 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 68 [2021-11-07 01:05:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:17,434 INFO L225 Difference]: With dead ends: 11441 [2021-11-07 01:05:17,435 INFO L226 Difference]: Without dead ends: 7901 [2021-11-07 01:05:17,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:05:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-11-07 01:05:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5107. [2021-11-07 01:05:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5107 states, 5102 states have (on average 1.8149745197961584) internal successors, (9260), 5106 states have internal predecessors, (9260), 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) [2021-11-07 01:05:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5107 states to 5107 states and 9260 transitions. [2021-11-07 01:05:17,861 INFO L78 Accepts]: Start accepts. Automaton has 5107 states and 9260 transitions. Word has length 68 [2021-11-07 01:05:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:17,862 INFO L470 AbstractCegarLoop]: Abstraction has 5107 states and 9260 transitions. [2021-11-07 01:05:17,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 5 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) [2021-11-07 01:05:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 5107 states and 9260 transitions. [2021-11-07 01:05:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:05:17,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:17,867 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] [2021-11-07 01:05:17,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:18,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:18,083 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)] === [2021-11-07 01:05:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1159401635, now seen corresponding path program 1 times [2021-11-07 01:05:18,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:18,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392604387] [2021-11-07 01:05:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:18,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:18,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:18,085 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:18,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:05:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:05:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:18,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:19,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:19,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392604387] [2021-11-07 01:05:19,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392604387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:19,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:19,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:05:19,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807780377] [2021-11-07 01:05:19,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:05:19,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:05:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:05:19,140 INFO L87 Difference]: Start difference. First operand 5107 states and 9260 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-07 01:05:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:23,756 INFO L93 Difference]: Finished difference Result 20288 states and 37066 transitions. [2021-11-07 01:05:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:05:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 [2021-11-07 01:05:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:23,800 INFO L225 Difference]: With dead ends: 20288 [2021-11-07 01:05:23,801 INFO L226 Difference]: Without dead ends: 15230 [2021-11-07 01:05:23,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:05:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15230 states. [2021-11-07 01:05:24,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15230 to 5113. [2021-11-07 01:05:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 5108 states have (on average 1.8140172278778386) internal successors, (9266), 5112 states have internal predecessors, (9266), 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) [2021-11-07 01:05:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 9266 transitions. [2021-11-07 01:05:24,200 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 9266 transitions. Word has length 69 [2021-11-07 01:05:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:24,201 INFO L470 AbstractCegarLoop]: Abstraction has 5113 states and 9266 transitions. [2021-11-07 01:05:24,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-07 01:05:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 9266 transitions. [2021-11-07 01:05:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:05:24,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:24,204 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] [2021-11-07 01:05:24,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:24,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:24,420 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)] === [2021-11-07 01:05:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1253541228, now seen corresponding path program 1 times [2021-11-07 01:05:24,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:24,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089575189] [2021-11-07 01:05:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:24,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:24,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:24,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:24,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:05:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:25,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:25,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:25,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:25,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089575189] [2021-11-07 01:05:25,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089575189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:25,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:25,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:05:25,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236818391] [2021-11-07 01:05:25,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:05:25,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:25,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:05:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:05:25,426 INFO L87 Difference]: Start difference. First operand 5113 states and 9266 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2021-11-07 01:05:35,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:35,046 INFO L93 Difference]: Finished difference Result 14310 states and 26017 transitions. [2021-11-07 01:05:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:05:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 70 [2021-11-07 01:05:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:35,070 INFO L225 Difference]: With dead ends: 14310 [2021-11-07 01:05:35,071 INFO L226 Difference]: Without dead ends: 10839 [2021-11-07 01:05:35,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2021-11-07 01:05:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 8862. [2021-11-07 01:05:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8862 states, 8857 states have (on average 1.8166422039065147) internal successors, (16090), 8861 states have internal predecessors, (16090), 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) [2021-11-07 01:05:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8862 states to 8862 states and 16090 transitions. [2021-11-07 01:05:35,620 INFO L78 Accepts]: Start accepts. Automaton has 8862 states and 16090 transitions. Word has length 70 [2021-11-07 01:05:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:35,621 INFO L470 AbstractCegarLoop]: Abstraction has 8862 states and 16090 transitions. [2021-11-07 01:05:35,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2021-11-07 01:05:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 8862 states and 16090 transitions. [2021-11-07 01:05:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:05:35,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:35,636 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] [2021-11-07 01:05:35,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:35,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:35,851 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)] === [2021-11-07 01:05:35,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1840347242, now seen corresponding path program 1 times [2021-11-07 01:05:35,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:35,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723217292] [2021-11-07 01:05:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:35,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:35,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:35,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:35,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:05:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:36,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:36,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:36,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723217292] [2021-11-07 01:05:36,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723217292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:36,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:36,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:05:36,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141318574] [2021-11-07 01:05:36,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:36,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:36,962 INFO L87 Difference]: Start difference. First operand 8862 states and 16090 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-07 01:05:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:40,636 INFO L93 Difference]: Finished difference Result 18667 states and 33941 transitions. [2021-11-07 01:05:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:05:40,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 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 70 [2021-11-07 01:05:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:40,658 INFO L225 Difference]: With dead ends: 18667 [2021-11-07 01:05:40,659 INFO L226 Difference]: Without dead ends: 11432 [2021-11-07 01:05:40,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:05:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11432 states. [2021-11-07 01:05:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11432 to 8876. [2021-11-07 01:05:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 8871 states have (on average 1.7804080712433772) internal successors, (15794), 8875 states have internal predecessors, (15794), 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) [2021-11-07 01:05:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 15794 transitions. [2021-11-07 01:05:41,132 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 15794 transitions. Word has length 70 [2021-11-07 01:05:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:41,133 INFO L470 AbstractCegarLoop]: Abstraction has 8876 states and 15794 transitions. [2021-11-07 01:05:41,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 states have internal predecessors, (70), 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) [2021-11-07 01:05:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 15794 transitions. [2021-11-07 01:05:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:05:41,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:41,136 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] [2021-11-07 01:05:41,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:41,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:41,351 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)] === [2021-11-07 01:05:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1847546660, now seen corresponding path program 1 times [2021-11-07 01:05:41,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:41,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547357655] [2021-11-07 01:05:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:41,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:41,353 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:41,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:05:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:41,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:05:41,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:42,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:42,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:42,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547357655] [2021-11-07 01:05:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547357655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:42,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:42,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:05:42,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935151859] [2021-11-07 01:05:42,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:05:42,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:42,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:05:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:05:42,421 INFO L87 Difference]: Start difference. First operand 8876 states and 15794 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-07 01:05:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:45,015 INFO L93 Difference]: Finished difference Result 60108 states and 107709 transitions. [2021-11-07 01:05:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:05:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 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 72 [2021-11-07 01:05:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:45,115 INFO L225 Difference]: With dead ends: 60108 [2021-11-07 01:05:45,115 INFO L226 Difference]: Without dead ends: 51277 [2021-11-07 01:05:45,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:05:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51277 states. [2021-11-07 01:05:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51277 to 13864. [2021-11-07 01:05:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13864 states, 13859 states have (on average 1.7893787430550545) internal successors, (24799), 13863 states have internal predecessors, (24799), 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) [2021-11-07 01:05:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13864 states to 13864 states and 24799 transitions. [2021-11-07 01:05:46,311 INFO L78 Accepts]: Start accepts. Automaton has 13864 states and 24799 transitions. Word has length 72 [2021-11-07 01:05:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:46,312 INFO L470 AbstractCegarLoop]: Abstraction has 13864 states and 24799 transitions. [2021-11-07 01:05:46,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-11-07 01:05:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 13864 states and 24799 transitions. [2021-11-07 01:05:46,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:05:46,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:46,316 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] [2021-11-07 01:05:46,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:46,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:46,517 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)] === [2021-11-07 01:05:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1572787046, now seen corresponding path program 1 times [2021-11-07 01:05:46,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:46,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706311456] [2021-11-07 01:05:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:46,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:46,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:46,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:46,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:05:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:47,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:05:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:47,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:47,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:47,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706311456] [2021-11-07 01:05:47,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706311456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:47,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:47,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:05:47,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262066496] [2021-11-07 01:05:47,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:05:47,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:05:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:47,680 INFO L87 Difference]: Start difference. First operand 13864 states and 24799 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 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) [2021-11-07 01:05:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:50,246 INFO L93 Difference]: Finished difference Result 31121 states and 55962 transitions. [2021-11-07 01:05:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:05:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 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 72 [2021-11-07 01:05:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:50,271 INFO L225 Difference]: With dead ends: 31121 [2021-11-07 01:05:50,271 INFO L226 Difference]: Without dead ends: 22187 [2021-11-07 01:05:50,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:05:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22187 states. [2021-11-07 01:05:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22187 to 13844. [2021-11-07 01:05:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13844 states, 13839 states have (on average 1.7890743550834598) internal successors, (24759), 13843 states have internal predecessors, (24759), 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) [2021-11-07 01:05:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13844 states to 13844 states and 24759 transitions. [2021-11-07 01:05:51,063 INFO L78 Accepts]: Start accepts. Automaton has 13844 states and 24759 transitions. Word has length 72 [2021-11-07 01:05:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:51,064 INFO L470 AbstractCegarLoop]: Abstraction has 13844 states and 24759 transitions. [2021-11-07 01:05:51,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 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) [2021-11-07 01:05:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 13844 states and 24759 transitions. [2021-11-07 01:05:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:05:51,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:51,067 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] [2021-11-07 01:05:51,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:05:51,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:51,275 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)] === [2021-11-07 01:05:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash -92150404, now seen corresponding path program 1 times [2021-11-07 01:05:51,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:51,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408166599] [2021-11-07 01:05:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:51,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:51,277 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:51,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:05:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:52,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:52,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:52,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:52,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408166599] [2021-11-07 01:05:52,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408166599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:52,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:52,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:05:52,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032599916] [2021-11-07 01:05:52,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:05:52,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:05:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:52,535 INFO L87 Difference]: Start difference. First operand 13844 states and 24759 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2021-11-07 01:05:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:53,739 INFO L93 Difference]: Finished difference Result 35656 states and 63824 transitions. [2021-11-07 01:05:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:53,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 79 [2021-11-07 01:05:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:53,775 INFO L225 Difference]: With dead ends: 35656 [2021-11-07 01:05:53,775 INFO L226 Difference]: Without dead ends: 23712 [2021-11-07 01:05:53,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23712 states. [2021-11-07 01:05:55,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23712 to 23697. [2021-11-07 01:05:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23697 states, 23692 states have (on average 1.7948252574708763) internal successors, (42523), 23696 states have internal predecessors, (42523), 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) [2021-11-07 01:05:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23697 states to 23697 states and 42523 transitions. [2021-11-07 01:05:55,328 INFO L78 Accepts]: Start accepts. Automaton has 23697 states and 42523 transitions. Word has length 79 [2021-11-07 01:05:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:55,329 INFO L470 AbstractCegarLoop]: Abstraction has 23697 states and 42523 transitions. [2021-11-07 01:05:55,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2021-11-07 01:05:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23697 states and 42523 transitions. [2021-11-07 01:05:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:05:55,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:55,335 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] [2021-11-07 01:05:55,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:55,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:55,556 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)] === [2021-11-07 01:05:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1425985171, now seen corresponding path program 1 times [2021-11-07 01:05:55,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:55,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884199192] [2021-11-07 01:05:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:55,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:55,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:55,558 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:55,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:05:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:56,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:56,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:56,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:56,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:56,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884199192] [2021-11-07 01:05:56,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884199192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:56,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:56,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:05:56,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472265772] [2021-11-07 01:05:56,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:05:56,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:05:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:56,904 INFO L87 Difference]: Start difference. First operand 23697 states and 42523 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-11-07 01:05:59,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:59,231 INFO L93 Difference]: Finished difference Result 63902 states and 114645 transitions. [2021-11-07 01:05:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:59,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2021-11-07 01:05:59,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:59,295 INFO L225 Difference]: With dead ends: 63902 [2021-11-07 01:05:59,295 INFO L226 Difference]: Without dead ends: 43222 [2021-11-07 01:05:59,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43222 states. [2021-11-07 01:06:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43222 to 43207. [2021-11-07 01:06:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43207 states, 43202 states have (on average 1.797694551178186) internal successors, (77664), 43206 states have internal predecessors, (77664), 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) [2021-11-07 01:06:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43207 states to 43207 states and 77664 transitions. [2021-11-07 01:06:01,767 INFO L78 Accepts]: Start accepts. Automaton has 43207 states and 77664 transitions. Word has length 80 [2021-11-07 01:06:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:01,767 INFO L470 AbstractCegarLoop]: Abstraction has 43207 states and 77664 transitions. [2021-11-07 01:06:01,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2021-11-07 01:06:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 43207 states and 77664 transitions. [2021-11-07 01:06:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:06:01,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:01,773 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] [2021-11-07 01:06:01,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:01,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:01,983 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)] === [2021-11-07 01:06:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2103665121, now seen corresponding path program 1 times [2021-11-07 01:06:01,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:01,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777587274] [2021-11-07 01:06:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:01,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:01,987 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:02,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:06:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:03,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:03,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:03,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777587274] [2021-11-07 01:06:03,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777587274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:03,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:03,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:06:03,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384135092] [2021-11-07 01:06:03,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:06:03,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:06:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:06:03,586 INFO L87 Difference]: Start difference. First operand 43207 states and 77664 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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) [2021-11-07 01:06:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:08,237 INFO L93 Difference]: Finished difference Result 120002 states and 215464 transitions. [2021-11-07 01:06:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:08,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 81 [2021-11-07 01:06:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:08,390 INFO L225 Difference]: With dead ends: 120002 [2021-11-07 01:06:08,390 INFO L226 Difference]: Without dead ends: 81820 [2021-11-07 01:06:08,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:06:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81820 states. [2021-11-07 01:06:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81820 to 81805. [2021-11-07 01:06:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81805 states, 81800 states have (on average 1.7980073349633252) internal successors, (147077), 81804 states have internal predecessors, (147077), 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) [2021-11-07 01:06:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81805 states to 81805 states and 147077 transitions. [2021-11-07 01:06:13,345 INFO L78 Accepts]: Start accepts. Automaton has 81805 states and 147077 transitions. Word has length 81 [2021-11-07 01:06:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:06:13,346 INFO L470 AbstractCegarLoop]: Abstraction has 81805 states and 147077 transitions. [2021-11-07 01:06:13,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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) [2021-11-07 01:06:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 81805 states and 147077 transitions. [2021-11-07 01:06:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:06:13,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:06:13,355 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] [2021-11-07 01:06:13,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:06:13,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:06:13,575 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)] === [2021-11-07 01:06:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:06:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1782529586, now seen corresponding path program 1 times [2021-11-07 01:06:13,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:06:13,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463763574] [2021-11-07 01:06:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:06:13,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:06:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:06:13,578 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:06:13,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45109158-f1aa-4004-8575-1ccdb20faa29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:06:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:06:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:06:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:06:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:14,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:06:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:06:14,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:06:14,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463763574] [2021-11-07 01:06:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463763574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:06:14,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:06:14,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:06:14,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333741887] [2021-11-07 01:06:14,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:06:14,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:06:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:06:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:06:14,924 INFO L87 Difference]: Start difference. First operand 81805 states and 147077 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2021-11-07 01:06:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:06:23,264 INFO L93 Difference]: Finished difference Result 231358 states and 415255 transitions. [2021-11-07 01:06:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:06:23,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 82 [2021-11-07 01:06:23,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:06:23,591 INFO L225 Difference]: With dead ends: 231358 [2021-11-07 01:06:23,591 INFO L226 Difference]: Without dead ends: 158142 [2021-11-07 01:06:23,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:06:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158142 states.