./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product30.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_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/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_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/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_a5131954-b8e2-4b36-9be0-9510ba5daf29/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 f0b632d57a1aaab7587941b987ac776406d0d2705d0d18f7c4a153447ae1ce66 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:43:31,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:43:31,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:43:31,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:43:31,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:43:31,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:43:31,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:43:31,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:43:31,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:43:31,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:43:31,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:43:31,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:43:31,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:43:31,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:43:31,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:43:31,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:43:31,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:43:31,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:43:31,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:43:31,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:43:31,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:43:31,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:43:31,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:43:31,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:43:31,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:43:31,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:43:31,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:43:31,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:43:31,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:43:31,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:43:31,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:43:31,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:43:31,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:43:31,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:43:31,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:43:31,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:43:31,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:43:31,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:43:31,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:43:31,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:43:31,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:43:31,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:43:31,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:43:31,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:43:31,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:43:31,255 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:43:31,256 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:43:31,256 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:43:31,256 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:43:31,256 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:43:31,263 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:43:31,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:43:31,264 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:43:31,265 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:43:31,265 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:43:31,265 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:43:31,265 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:43:31,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:43:31,266 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:43:31,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:43:31,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:43:31,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:43:31,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:43:31,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:43:31,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:43:31,268 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:43:31,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:43:31,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:43:31,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:43:31,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:43:31,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:43:31,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:43:31,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:31,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:43:31,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:43:31,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:43:31,272 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:43:31,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:43:31,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:43:31,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:43:31,273 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:43:31,273 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_a5131954-b8e2-4b36-9be0-9510ba5daf29/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0b632d57a1aaab7587941b987ac776406d0d2705d0d18f7c4a153447ae1ce66 [2021-11-07 01:43:31,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:43:31,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:43:31,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:43:31,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:43:31,622 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:43:31,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product30.cil.c [2021-11-07 01:43:31,710 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/c724cbd6c/733111050fbe4e039ba0c7298645a860/FLAG4bfbcd722 [2021-11-07 01:43:32,323 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:43:32,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/sv-benchmarks/c/product-lines/email_spec7_product30.cil.c [2021-11-07 01:43:32,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/c724cbd6c/733111050fbe4e039ba0c7298645a860/FLAG4bfbcd722 [2021-11-07 01:43:32,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/c724cbd6c/733111050fbe4e039ba0c7298645a860 [2021-11-07 01:43:32,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:43:32,537 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:43:32,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:32,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:43:32,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:43:32,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:32" (1/1) ... [2021-11-07 01:43:32,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b48c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:32, skipping insertion in model container [2021-11-07 01:43:32,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:32" (1/1) ... [2021-11-07 01:43:32,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:43:32,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:43:33,158 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_a5131954-b8e2-4b36-9be0-9510ba5daf29/sv-benchmarks/c/product-lines/email_spec7_product30.cil.c[50838,50851] [2021-11-07 01:43:33,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:33,250 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 01:43:33,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7061ba9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:33, skipping insertion in model container [2021-11-07 01:43:33,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:33,252 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:43:33,254 INFO L168 Benchmark]: Toolchain (without parser) took 715.88 ms. Allocated memory is still 98.6 MB. Free memory was 55.5 MB in the beginning and 63.0 MB in the end (delta: -7.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:43:33,254 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory is still 74.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:43:33,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 704.62 ms. Allocated memory is still 98.6 MB. Free memory was 77.5 MB in the beginning and 63.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:43:33,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory is still 74.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 704.62 ms. Allocated memory is still 98.6 MB. Free memory was 77.5 MB in the beginning and 63.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/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_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/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_a5131954-b8e2-4b36-9be0-9510ba5daf29/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 f0b632d57a1aaab7587941b987ac776406d0d2705d0d18f7c4a153447ae1ce66 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:43:35,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:43:35,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:43:35,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:43:35,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:43:35,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:43:35,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:43:35,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:43:35,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:43:35,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:43:35,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:43:35,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:43:35,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:43:35,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:43:35,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:43:35,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:43:35,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:43:35,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:43:35,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:43:35,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:43:35,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:43:35,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:43:35,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:43:35,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:43:35,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:43:35,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:43:35,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:43:35,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:43:35,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:43:35,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:43:35,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:43:35,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:43:35,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:43:35,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:43:35,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:43:35,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:43:35,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:43:35,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:43:35,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:43:35,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:43:35,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:43:35,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:43:35,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:43:35,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:43:35,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:43:35,640 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:43:35,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:43:35,640 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:43:35,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:43:35,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:43:35,641 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:43:35,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:43:35,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:43:35,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:43:35,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:43:35,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:43:35,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:43:35,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:43:35,645 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:43:35,645 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:43:35,645 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:43:35,646 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:43:35,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:43:35,646 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:43:35,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:43:35,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:43:35,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:43:35,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:43:35,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:35,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:43:35,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:43:35,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:43:35,648 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:43:35,648 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:35,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:43:35,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:43:35,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:43:35,650 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_a5131954-b8e2-4b36-9be0-9510ba5daf29/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0b632d57a1aaab7587941b987ac776406d0d2705d0d18f7c4a153447ae1ce66 [2021-11-07 01:43:36,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:43:36,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:43:36,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:43:36,035 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:43:36,036 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:43:36,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product30.cil.c [2021-11-07 01:43:36,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/ae119368f/20518a93ec144f52bb789499db39e5ae/FLAGdd424ffe2 [2021-11-07 01:43:36,834 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:43:36,834 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/sv-benchmarks/c/product-lines/email_spec7_product30.cil.c [2021-11-07 01:43:36,861 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/ae119368f/20518a93ec144f52bb789499db39e5ae/FLAGdd424ffe2 [2021-11-07 01:43:37,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/data/ae119368f/20518a93ec144f52bb789499db39e5ae [2021-11-07 01:43:37,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:43:37,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:43:37,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:37,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:43:37,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:43:37,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:37" (1/1) ... [2021-11-07 01:43:37,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233b1d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:37, skipping insertion in model container [2021-11-07 01:43:37,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:37" (1/1) ... [2021-11-07 01:43:37,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:43:37,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:43:37,766 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_a5131954-b8e2-4b36-9be0-9510ba5daf29/sv-benchmarks/c/product-lines/email_spec7_product30.cil.c[50838,50851] [2021-11-07 01:43:37,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:37,912 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:43:37,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:43:38,042 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_a5131954-b8e2-4b36-9be0-9510ba5daf29/sv-benchmarks/c/product-lines/email_spec7_product30.cil.c[50838,50851] [2021-11-07 01:43:38,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:38,093 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:43:38,179 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_a5131954-b8e2-4b36-9be0-9510ba5daf29/sv-benchmarks/c/product-lines/email_spec7_product30.cil.c[50838,50851] [2021-11-07 01:43:38,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:43:38,252 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:43:38,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38 WrapperNode [2021-11-07 01:43:38,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:43:38,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:43:38,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:43:38,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:43:38,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:43:38,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:43:38,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:43:38,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:43:38,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:43:38,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:43:38,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:43:38,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:43:38,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (1/1) ... [2021-11-07 01:43:38,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:38,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:38,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:43:38,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:43:38,700 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:43:38,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:43:38,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:43:38,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:43:38,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:43:43,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:43:43,257 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:43:43,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:43 BoogieIcfgContainer [2021-11-07 01:43:43,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:43:43,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:43:43,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:43:43,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:43:43,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:43:37" (1/3) ... [2021-11-07 01:43:43,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31578809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:43, skipping insertion in model container [2021-11-07 01:43:43,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:38" (2/3) ... [2021-11-07 01:43:43,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31578809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:43, skipping insertion in model container [2021-11-07 01:43:43,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:43" (3/3) ... [2021-11-07 01:43:43,272 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product30.cil.c [2021-11-07 01:43:43,278 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:43:43,278 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:43:43,346 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:43:43,354 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 01:43:43,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:43:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 501 states, 498 states have (on average 1.7550200803212852) internal successors, (874), 500 states have internal predecessors, (874), 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 01:43:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:43:43,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:43,400 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] [2021-11-07 01:43:43,401 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:43,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1971564646, now seen corresponding path program 1 times [2021-11-07 01:43:43,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:43,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103094797] [2021-11-07 01:43:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:43,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:43,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:43,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:43:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:43:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:44,059 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 01:43:44,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:44,196 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 01:43:44,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:44,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103094797] [2021-11-07 01:43:44,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103094797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:44,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:44,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:43:44,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922917495] [2021-11-07 01:43:44,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:43:44,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:44,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:43:44,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:43:44,229 INFO L87 Difference]: Start difference. First operand has 501 states, 498 states have (on average 1.7550200803212852) internal successors, (874), 500 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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 01:43:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:44,299 INFO L93 Difference]: Finished difference Result 760 states and 1307 transitions. [2021-11-07 01:43:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:43:44,301 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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 52 [2021-11-07 01:43:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:44,317 INFO L225 Difference]: With dead ends: 760 [2021-11-07 01:43:44,318 INFO L226 Difference]: Without dead ends: 448 [2021-11-07 01:43:44,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 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 01:43:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-07 01:43:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2021-11-07 01:43:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 446 states have (on average 1.751121076233184) internal successors, (781), 447 states have internal predecessors, (781), 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 01:43:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 781 transitions. [2021-11-07 01:43:44,419 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 781 transitions. Word has length 52 [2021-11-07 01:43:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:44,420 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 781 transitions. [2021-11-07 01:43:44,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 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 01:43:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 781 transitions. [2021-11-07 01:43:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:43:44,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:44,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:44,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:44,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:44,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash -618857657, now seen corresponding path program 1 times [2021-11-07 01:43:44,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:44,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833069874] [2021-11-07 01:43:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:44,635 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:44,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:43:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:43:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:45,165 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 01:43:45,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:45,311 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 01:43:45,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:45,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833069874] [2021-11-07 01:43:45,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833069874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:45,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:45,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:45,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211923112] [2021-11-07 01:43:45,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:45,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:45,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:45,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:45,315 INFO L87 Difference]: Start difference. First operand 448 states and 781 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 01:43:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:45,448 INFO L93 Difference]: Finished difference Result 1314 states and 2295 transitions. [2021-11-07 01:43:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:45,450 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 53 [2021-11-07 01:43:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:45,457 INFO L225 Difference]: With dead ends: 1314 [2021-11-07 01:43:45,457 INFO L226 Difference]: Without dead ends: 881 [2021-11-07 01:43:45,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 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 01:43:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-11-07 01:43:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 447. [2021-11-07 01:43:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 445 states have (on average 1.743820224719101) internal successors, (776), 446 states have internal predecessors, (776), 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 01:43:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 776 transitions. [2021-11-07 01:43:45,502 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 776 transitions. Word has length 53 [2021-11-07 01:43:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:45,502 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 776 transitions. [2021-11-07 01:43:45,502 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 01:43:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 776 transitions. [2021-11-07 01:43:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:43:45,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:45,505 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:45,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:45,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:45,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1715174317, now seen corresponding path program 1 times [2021-11-07 01:43:45,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:45,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510558090] [2021-11-07 01:43:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:45,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:45,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:45,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:43:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:46,356 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 01:43:46,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:46,566 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 01:43:46,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:46,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510558090] [2021-11-07 01:43:46,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510558090] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:46,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:46,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:46,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31176399] [2021-11-07 01:43:46,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:46,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:46,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:46,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:46,569 INFO L87 Difference]: Start difference. First operand 447 states and 776 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:46,825 INFO L93 Difference]: Finished difference Result 1705 states and 2966 transitions. [2021-11-07 01:43:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:43:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:46,834 INFO L225 Difference]: With dead ends: 1705 [2021-11-07 01:43:46,834 INFO L226 Difference]: Without dead ends: 1276 [2021-11-07 01:43:46,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 01:43:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-11-07 01:43:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 446. [2021-11-07 01:43:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.7387387387387387) internal successors, (772), 445 states have internal predecessors, (772), 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 01:43:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 772 transitions. [2021-11-07 01:43:46,870 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 772 transitions. Word has length 55 [2021-11-07 01:43:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:46,871 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 772 transitions. [2021-11-07 01:43:46,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 772 transitions. [2021-11-07 01:43:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:43:46,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:46,873 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 01:43:46,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:47,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:47,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1246941760, now seen corresponding path program 1 times [2021-11-07 01:43:47,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:47,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292932310] [2021-11-07 01:43:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:47,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:47,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:47,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:47,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:43:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:47,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:43:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:47,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:47,872 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 01:43:47,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:47,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292932310] [2021-11-07 01:43:47,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292932310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:47,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:47,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:47,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686978110] [2021-11-07 01:43:47,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:47,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:47,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:47,875 INFO L87 Difference]: Start difference. First operand 446 states and 772 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:47,940 INFO L93 Difference]: Finished difference Result 889 states and 1541 transitions. [2021-11-07 01:43:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:43:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:47,944 INFO L225 Difference]: With dead ends: 889 [2021-11-07 01:43:47,944 INFO L226 Difference]: Without dead ends: 451 [2021-11-07 01:43:47,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 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 01:43:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-07 01:43:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 446. [2021-11-07 01:43:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.731981981981982) internal successors, (769), 445 states have internal predecessors, (769), 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 01:43:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 769 transitions. [2021-11-07 01:43:47,975 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 769 transitions. Word has length 56 [2021-11-07 01:43:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:47,976 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 769 transitions. [2021-11-07 01:43:47,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 769 transitions. [2021-11-07 01:43:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:43:47,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:47,978 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 01:43:47,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:48,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:48,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1075397269, now seen corresponding path program 1 times [2021-11-07 01:43:48,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:48,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106923906] [2021-11-07 01:43:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:48,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:48,197 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:48,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:43:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:48,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:43:48,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:48,818 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 01:43:48,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:48,967 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 01:43:48,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:48,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106923906] [2021-11-07 01:43:48,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106923906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:48,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:48,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:48,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578266358] [2021-11-07 01:43:48,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:48,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:48,970 INFO L87 Difference]: Start difference. First operand 446 states and 769 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:49,206 INFO L93 Difference]: Finished difference Result 1692 states and 2942 transitions. [2021-11-07 01:43:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:49,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 01:43:49,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:49,235 INFO L225 Difference]: With dead ends: 1692 [2021-11-07 01:43:49,235 INFO L226 Difference]: Without dead ends: 1272 [2021-11-07 01:43:49,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-11-07 01:43:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 446. [2021-11-07 01:43:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 444 states have (on average 1.7252252252252251) internal successors, (766), 445 states have internal predecessors, (766), 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 01:43:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 766 transitions. [2021-11-07 01:43:49,278 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 766 transitions. Word has length 57 [2021-11-07 01:43:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:49,278 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 766 transitions. [2021-11-07 01:43:49,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 01:43:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 766 transitions. [2021-11-07 01:43:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:43:49,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:49,280 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] [2021-11-07 01:43:49,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:49,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:49,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash 741170704, now seen corresponding path program 1 times [2021-11-07 01:43:49,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:49,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610046976] [2021-11-07 01:43:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:49,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:49,510 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:49,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:43:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:49,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:50,118 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 01:43:50,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:50,263 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 01:43:50,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:50,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610046976] [2021-11-07 01:43:50,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610046976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:50,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:50,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:50,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175893438] [2021-11-07 01:43:50,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:50,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:50,265 INFO L87 Difference]: Start difference. First operand 446 states and 766 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 01:43:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:50,355 INFO L93 Difference]: Finished difference Result 1072 states and 1845 transitions. [2021-11-07 01:43:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 59 [2021-11-07 01:43:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:50,362 INFO L225 Difference]: With dead ends: 1072 [2021-11-07 01:43:50,362 INFO L226 Difference]: Without dead ends: 866 [2021-11-07 01:43:50,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 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 01:43:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2021-11-07 01:43:50,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 660. [2021-11-07 01:43:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 658 states have (on average 1.7583586626139818) internal successors, (1157), 659 states have internal predecessors, (1157), 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 01:43:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1157 transitions. [2021-11-07 01:43:50,418 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1157 transitions. Word has length 59 [2021-11-07 01:43:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:50,418 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1157 transitions. [2021-11-07 01:43:50,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 01:43:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1157 transitions. [2021-11-07 01:43:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:43:50,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:50,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:50,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:50,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:50,635 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1829858593, now seen corresponding path program 1 times [2021-11-07 01:43:50,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:50,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226927339] [2021-11-07 01:43:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:50,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:50,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:50,638 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:50,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:43:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:51,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:51,281 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 01:43:51,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:51,436 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 01:43:51,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:51,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226927339] [2021-11-07 01:43:51,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226927339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:51,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:51,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:51,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195528254] [2021-11-07 01:43:51,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:51,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:51,438 INFO L87 Difference]: Start difference. First operand 660 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 01:43:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:51,530 INFO L93 Difference]: Finished difference Result 1604 states and 2819 transitions. [2021-11-07 01:43:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:51,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:43:51,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:51,538 INFO L225 Difference]: With dead ends: 1604 [2021-11-07 01:43:51,538 INFO L226 Difference]: Without dead ends: 1028 [2021-11-07 01:43:51,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:43:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-11-07 01:43:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 822. [2021-11-07 01:43:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 820 states have (on average 1.7695121951219512) internal successors, (1451), 821 states have internal predecessors, (1451), 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 01:43:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1451 transitions. [2021-11-07 01:43:51,627 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1451 transitions. Word has length 71 [2021-11-07 01:43:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:51,629 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1451 transitions. [2021-11-07 01:43:51,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 01:43:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1451 transitions. [2021-11-07 01:43:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:43:51,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:51,632 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 01:43:51,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:51,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:51,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:51,848 INFO L85 PathProgramCache]: Analyzing trace with hash 15153664, now seen corresponding path program 1 times [2021-11-07 01:43:51,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:51,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336707127] [2021-11-07 01:43:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:51,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:51,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:51,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:43:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:52,524 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 01:43:52,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:52,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:52,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336707127] [2021-11-07 01:43:52,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336707127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:52,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:52,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:52,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236824379] [2021-11-07 01:43:52,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:52,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:52,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:52,718 INFO L87 Difference]: Start difference. First operand 822 states and 1451 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:43:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:52,871 INFO L93 Difference]: Finished difference Result 2122 states and 3766 transitions. [2021-11-07 01:43:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:43:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:52,880 INFO L225 Difference]: With dead ends: 2122 [2021-11-07 01:43:52,881 INFO L226 Difference]: Without dead ends: 1392 [2021-11-07 01:43:52,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 01:43:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-11-07 01:43:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1186. [2021-11-07 01:43:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1184 states have (on average 1.7863175675675675) internal successors, (2115), 1185 states have internal predecessors, (2115), 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 01:43:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 2115 transitions. [2021-11-07 01:43:52,988 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 2115 transitions. Word has length 72 [2021-11-07 01:43:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:52,989 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 2115 transitions. [2021-11-07 01:43:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:43:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 2115 transitions. [2021-11-07 01:43:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:43:52,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:52,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:53,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:53,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:53,211 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:53,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1480198991, now seen corresponding path program 1 times [2021-11-07 01:43:53,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:53,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687730683] [2021-11-07 01:43:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:53,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:53,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:53,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:53,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:43:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:53,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:53,906 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 01:43:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:54,077 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 01:43:54,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:54,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687730683] [2021-11-07 01:43:54,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687730683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:54,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:54,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:54,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683283807] [2021-11-07 01:43:54,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:54,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:54,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:54,080 INFO L87 Difference]: Start difference. First operand 1186 states and 2115 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 01:43:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:54,246 INFO L93 Difference]: Finished difference Result 3194 states and 5727 transitions. [2021-11-07 01:43:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:54,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:43:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:54,260 INFO L225 Difference]: With dead ends: 3194 [2021-11-07 01:43:54,260 INFO L226 Difference]: Without dead ends: 2108 [2021-11-07 01:43:54,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 01:43:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-07 01:43:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1902. [2021-11-07 01:43:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1900 states have (on average 1.8010526315789475) internal successors, (3422), 1901 states have internal predecessors, (3422), 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 01:43:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3422 transitions. [2021-11-07 01:43:54,478 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3422 transitions. Word has length 73 [2021-11-07 01:43:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:54,478 INFO L470 AbstractCegarLoop]: Abstraction has 1902 states and 3422 transitions. [2021-11-07 01:43:54,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 01:43:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3422 transitions. [2021-11-07 01:43:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:43:54,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:54,483 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:54,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:54,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:54,699 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1463097137, now seen corresponding path program 1 times [2021-11-07 01:43:54,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:54,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570937610] [2021-11-07 01:43:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:54,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:54,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:54,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:54,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:43:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:55,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:55,398 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 01:43:55,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:55,564 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 01:43:55,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:55,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570937610] [2021-11-07 01:43:55,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570937610] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:55,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:55,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:55,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783782498] [2021-11-07 01:43:55,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:55,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:55,567 INFO L87 Difference]: Start difference. First operand 1902 states and 3422 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:43:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:55,816 INFO L93 Difference]: Finished difference Result 5078 states and 9167 transitions. [2021-11-07 01:43:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:55,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:43:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:55,840 INFO L225 Difference]: With dead ends: 5078 [2021-11-07 01:43:55,840 INFO L226 Difference]: Without dead ends: 3310 [2021-11-07 01:43:55,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 01:43:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-11-07 01:43:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 3104. [2021-11-07 01:43:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3102 states have (on average 1.8088330109606705) internal successors, (5611), 3103 states have internal predecessors, (5611), 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 01:43:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 5611 transitions. [2021-11-07 01:43:56,126 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 5611 transitions. Word has length 74 [2021-11-07 01:43:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:56,127 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 5611 transitions. [2021-11-07 01:43:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 01:43:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 5611 transitions. [2021-11-07 01:43:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:43:56,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:56,133 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:56,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:56,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:56,349 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash 639655040, now seen corresponding path program 1 times [2021-11-07 01:43:56,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:56,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123380315] [2021-11-07 01:43:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:56,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:56,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:56,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:56,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:43:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:57,072 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 01:43:57,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:57,222 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 01:43:57,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:57,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123380315] [2021-11-07 01:43:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123380315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:57,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:57,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:57,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099478034] [2021-11-07 01:43:57,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:57,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:57,225 INFO L87 Difference]: Start difference. First operand 3104 states and 5611 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:43:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:57,560 INFO L93 Difference]: Finished difference Result 8400 states and 15217 transitions. [2021-11-07 01:43:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:43:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:57,597 INFO L225 Difference]: With dead ends: 8400 [2021-11-07 01:43:57,597 INFO L226 Difference]: Without dead ends: 5464 [2021-11-07 01:43:57,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 01:43:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5464 states. [2021-11-07 01:43:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5464 to 5258. [2021-11-07 01:43:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5258 states, 5256 states have (on average 1.8120243531202436) internal successors, (9524), 5257 states have internal predecessors, (9524), 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 01:43:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5258 states to 5258 states and 9524 transitions. [2021-11-07 01:43:58,010 INFO L78 Accepts]: Start accepts. Automaton has 5258 states and 9524 transitions. Word has length 75 [2021-11-07 01:43:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:58,010 INFO L470 AbstractCegarLoop]: Abstraction has 5258 states and 9524 transitions. [2021-11-07 01:43:58,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 01:43:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 5258 states and 9524 transitions. [2021-11-07 01:43:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:43:58,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:58,017 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:58,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:58,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:58,232 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1845659424, now seen corresponding path program 1 times [2021-11-07 01:43:58,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:58,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245865063] [2021-11-07 01:43:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:58,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:58,234 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:58,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:43:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:59,017 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 01:43:59,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:59,191 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 01:43:59,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:59,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245865063] [2021-11-07 01:43:59,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245865063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:59,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:59,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:59,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364743355] [2021-11-07 01:43:59,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:59,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:59,193 INFO L87 Difference]: Start difference. First operand 5258 states and 9524 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:59,811 INFO L93 Difference]: Finished difference Result 15320 states and 27798 transitions. [2021-11-07 01:43:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:43:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:59,863 INFO L225 Difference]: With dead ends: 15320 [2021-11-07 01:43:59,863 INFO L226 Difference]: Without dead ends: 10234 [2021-11-07 01:43:59,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 01:43:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-11-07 01:44:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 10028. [2021-11-07 01:44:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 10026 states have (on average 1.8133851984839418) internal successors, (18181), 10027 states have internal predecessors, (18181), 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 01:44:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 18181 transitions. [2021-11-07 01:44:00,576 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 18181 transitions. Word has length 76 [2021-11-07 01:44:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:00,576 INFO L470 AbstractCegarLoop]: Abstraction has 10028 states and 18181 transitions. [2021-11-07 01:44:00,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 18181 transitions. [2021-11-07 01:44:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:44:00,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:00,587 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:00,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:00,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:00,802 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:00,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:00,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1304664912, now seen corresponding path program 1 times [2021-11-07 01:44:00,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:00,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619014074] [2021-11-07 01:44:00,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:00,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:00,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:00,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:00,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:44:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:01,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:01,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:01,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:44:01,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:01,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619014074] [2021-11-07 01:44:01,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619014074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:01,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:01,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:01,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541528790] [2021-11-07 01:44:01,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:01,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:01,815 INFO L87 Difference]: Start difference. First operand 10028 states and 18181 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 01:44:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:04,855 INFO L93 Difference]: Finished difference Result 24715 states and 44822 transitions. [2021-11-07 01:44:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:44:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:44:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:04,911 INFO L225 Difference]: With dead ends: 24715 [2021-11-07 01:44:04,911 INFO L226 Difference]: Without dead ends: 14937 [2021-11-07 01:44:04,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 01:44:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14937 states. [2021-11-07 01:44:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14937 to 9995. [2021-11-07 01:44:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9995 states, 9993 states have (on average 1.8061643150205144) internal successors, (18049), 9994 states have internal predecessors, (18049), 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 01:44:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9995 states to 9995 states and 18049 transitions. [2021-11-07 01:44:05,684 INFO L78 Accepts]: Start accepts. Automaton has 9995 states and 18049 transitions. Word has length 77 [2021-11-07 01:44:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:05,684 INFO L470 AbstractCegarLoop]: Abstraction has 9995 states and 18049 transitions. [2021-11-07 01:44:05,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 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 01:44:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 9995 states and 18049 transitions. [2021-11-07 01:44:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:44:05,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:05,694 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:05,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:05,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:05,909 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1270068113, now seen corresponding path program 1 times [2021-11-07 01:44:05,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:05,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756579717] [2021-11-07 01:44:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:05,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:05,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:05,911 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:05,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:44:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:06,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:06,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:06,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:06,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756579717] [2021-11-07 01:44:06,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756579717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:06,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:06,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:06,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092608279] [2021-11-07 01:44:06,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:06,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:06,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:06,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:06,987 INFO L87 Difference]: Start difference. First operand 9995 states and 18049 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 01:44:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:07,933 INFO L93 Difference]: Finished difference Result 29235 states and 52856 transitions. [2021-11-07 01:44:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:44:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:07,992 INFO L225 Difference]: With dead ends: 29235 [2021-11-07 01:44:07,992 INFO L226 Difference]: Without dead ends: 19419 [2021-11-07 01:44:08,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 01:44:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19419 states. [2021-11-07 01:44:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19419 to 19213. [2021-11-07 01:44:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19213 states, 19211 states have (on average 1.805736296913227) internal successors, (34690), 19212 states have internal predecessors, (34690), 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 01:44:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19213 states to 19213 states and 34690 transitions. [2021-11-07 01:44:09,377 INFO L78 Accepts]: Start accepts. Automaton has 19213 states and 34690 transitions. Word has length 77 [2021-11-07 01:44:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:09,378 INFO L470 AbstractCegarLoop]: Abstraction has 19213 states and 34690 transitions. [2021-11-07 01:44:09,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 01:44:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 19213 states and 34690 transitions. [2021-11-07 01:44:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:44:09,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:09,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:09,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:09,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:09,603 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash -271163742, now seen corresponding path program 1 times [2021-11-07 01:44:09,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:09,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760417193] [2021-11-07 01:44:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:09,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:09,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:09,605 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:09,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:44:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:10,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:10,405 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 01:44:10,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:10,594 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 01:44:10,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:10,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760417193] [2021-11-07 01:44:10,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760417193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:10,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:10,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:10,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129529203] [2021-11-07 01:44:10,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:10,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:10,596 INFO L87 Difference]: Start difference. First operand 19213 states and 34690 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:12,113 INFO L93 Difference]: Finished difference Result 57075 states and 103093 transitions. [2021-11-07 01:44:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:12,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:44:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:12,228 INFO L225 Difference]: With dead ends: 57075 [2021-11-07 01:44:12,228 INFO L226 Difference]: Without dead ends: 38045 [2021-11-07 01:44:12,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 01:44:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38045 states. [2021-11-07 01:44:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38045 to 37839. [2021-11-07 01:44:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37839 states, 37837 states have (on average 1.8031820704601316) internal successors, (68227), 37838 states have internal predecessors, (68227), 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 01:44:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37839 states to 37839 states and 68227 transitions. [2021-11-07 01:44:14,379 INFO L78 Accepts]: Start accepts. Automaton has 37839 states and 68227 transitions. Word has length 78 [2021-11-07 01:44:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:14,380 INFO L470 AbstractCegarLoop]: Abstraction has 37839 states and 68227 transitions. [2021-11-07 01:44:14,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 37839 states and 68227 transitions. [2021-11-07 01:44:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:14,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:14,405 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:14,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:14,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:14,619 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1349191818, now seen corresponding path program 1 times [2021-11-07 01:44:14,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:14,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10801314] [2021-11-07 01:44:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:14,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:14,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:14,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:14,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:44:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:15,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:15,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:44:15,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:15,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10801314] [2021-11-07 01:44:15,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10801314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:15,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:15,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:44:15,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795264140] [2021-11-07 01:44:15,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:44:15,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:44:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:44:15,724 INFO L87 Difference]: Start difference. First operand 37839 states and 68227 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 01:44:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:22,597 INFO L93 Difference]: Finished difference Result 146765 states and 264476 transitions. [2021-11-07 01:44:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:44:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 01:44:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:22,853 INFO L225 Difference]: With dead ends: 146765 [2021-11-07 01:44:22,854 INFO L226 Difference]: Without dead ends: 109175 [2021-11-07 01:44:22,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109175 states. [2021-11-07 01:44:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109175 to 37581. [2021-11-07 01:44:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37581 states, 37579 states have (on average 1.7880997365549909) internal successors, (67195), 37580 states have internal predecessors, (67195), 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 01:44:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37581 states to 37581 states and 67195 transitions. [2021-11-07 01:44:25,633 INFO L78 Accepts]: Start accepts. Automaton has 37581 states and 67195 transitions. Word has length 79 [2021-11-07 01:44:25,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:25,633 INFO L470 AbstractCegarLoop]: Abstraction has 37581 states and 67195 transitions. [2021-11-07 01:44:25,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 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 01:44:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 37581 states and 67195 transitions. [2021-11-07 01:44:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:25,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:25,648 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:25,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:25,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,863 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1908781548, now seen corresponding path program 1 times [2021-11-07 01:44:25,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:25,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303496151] [2021-11-07 01:44:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:25,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:25,866 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:25,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:44:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:26,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:26,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:26,878 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:26,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303496151] [2021-11-07 01:44:26,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303496151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:26,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:26,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:44:26,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073043623] [2021-11-07 01:44:26,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:44:26,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:44:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:44:26,880 INFO L87 Difference]: Start difference. First operand 37581 states and 67195 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:28,888 INFO L93 Difference]: Finished difference Result 75113 states and 134313 transitions. [2021-11-07 01:44:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:28,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:44:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:28,941 INFO L225 Difference]: With dead ends: 75113 [2021-11-07 01:44:28,941 INFO L226 Difference]: Without dead ends: 37787 [2021-11-07 01:44:28,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 154 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 01:44:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37787 states. [2021-11-07 01:44:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37787 to 37581. [2021-11-07 01:44:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37581 states, 37579 states have (on average 1.7846935788605338) internal successors, (67067), 37580 states have internal predecessors, (67067), 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 01:44:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37581 states to 37581 states and 67067 transitions. [2021-11-07 01:44:31,053 INFO L78 Accepts]: Start accepts. Automaton has 37581 states and 67067 transitions. Word has length 79 [2021-11-07 01:44:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:31,053 INFO L470 AbstractCegarLoop]: Abstraction has 37581 states and 67067 transitions. [2021-11-07 01:44:31,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37581 states and 67067 transitions. [2021-11-07 01:44:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:44:31,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:31,069 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 01:44:31,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:44:31,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:31,284 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1879807039, now seen corresponding path program 1 times [2021-11-07 01:44:31,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:31,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76392656] [2021-11-07 01:44:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:31,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:31,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:31,287 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:31,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5131954-b8e2-4b36-9be0-9510ba5daf29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:44:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:32,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:44:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:32,206 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 01:44:32,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:32,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:32,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76392656] [2021-11-07 01:44:32,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76392656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:32,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:32,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:44:32,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998985167] [2021-11-07 01:44:32,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:44:32,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:32,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:44:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:44:32,409 INFO L87 Difference]: Start difference. First operand 37581 states and 67067 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 01:44:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:35,671 INFO L93 Difference]: Finished difference Result 104339 states and 185843 transitions. [2021-11-07 01:44:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:44:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 01:44:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:35,797 INFO L225 Difference]: With dead ends: 104339 [2021-11-07 01:44:35,797 INFO L226 Difference]: Without dead ends: 66973 [2021-11-07 01:44:35,825 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 01:44:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66973 states.