./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product17.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_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/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_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/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_1797ad8f-2be7-451b-9708-e32cecf83287/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 4d912bb29f92146b3af89aaec6570a3971933bc9b9284807c8f8b532bfb963bf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:20,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:20,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:21,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:21,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:21,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:21,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:21,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:21,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:21,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:21,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:21,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:21,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:21,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:21,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:21,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:21,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:21,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:21,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:21,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:21,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:21,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:21,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:21,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:21,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:21,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:21,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:21,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:21,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:21,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:21,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:21,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:21,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:21,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:21,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:21,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:21,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:21,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:21,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:21,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:21,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:21,115 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:04:21,158 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:21,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:21,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:21,160 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:21,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:21,161 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:21,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:04:21,161 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:21,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:21,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:04:21,168 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:04:21,168 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:21,169 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:04:21,169 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:04:21,169 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:04:21,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:21,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:04:21,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:04:21,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:04:21,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:21,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:21,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:21,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:21,172 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:21,172 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:04:21,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:21,172 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:21,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:21,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:21,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:21,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:21,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:21,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:21,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:21,175 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:04:21,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:04:21,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:21,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:21,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:21,176 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_1797ad8f-2be7-451b-9708-e32cecf83287/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d912bb29f92146b3af89aaec6570a3971933bc9b9284807c8f8b532bfb963bf [2021-11-07 02:04:21,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:21,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:21,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:21,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:21,492 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:21,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product17.cil.c [2021-11-07 02:04:21,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/138b46749/2f7cf7654daf4155afbee587b0fbc3d9/FLAGed7288e4a [2021-11-07 02:04:22,267 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:22,268 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/sv-benchmarks/c/product-lines/email_spec27_product17.cil.c [2021-11-07 02:04:22,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/138b46749/2f7cf7654daf4155afbee587b0fbc3d9/FLAGed7288e4a [2021-11-07 02:04:22,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/138b46749/2f7cf7654daf4155afbee587b0fbc3d9 [2021-11-07 02:04:22,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:22,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:22,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:22,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:22,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:22,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:22" (1/1) ... [2021-11-07 02:04:22,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f8c62c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:22, skipping insertion in model container [2021-11-07 02:04:22,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:22" (1/1) ... [2021-11-07 02:04:22,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:22,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:23,009 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_1797ad8f-2be7-451b-9708-e32cecf83287/sv-benchmarks/c/product-lines/email_spec27_product17.cil.c[18815,18828] [2021-11-07 02:04:23,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:23,212 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 02:04:23,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7e1c47e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:23, skipping insertion in model container [2021-11-07 02:04:23,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:23,213 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:04:23,216 INFO L168 Benchmark]: Toolchain (without parser) took 741.77 ms. Allocated memory is still 98.6 MB. Free memory was 68.3 MB in the beginning and 62.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:23,217 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 98.6 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:04:23,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 736.40 ms. Allocated memory is still 98.6 MB. Free memory was 68.2 MB in the beginning and 63.3 MB in the end (delta: 4.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:23,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 98.6 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 736.40 ms. Allocated memory is still 98.6 MB. Free memory was 68.2 MB in the beginning and 63.3 MB in the end (delta: 4.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1021]: 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_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/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_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/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_1797ad8f-2be7-451b-9708-e32cecf83287/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 4d912bb29f92146b3af89aaec6570a3971933bc9b9284807c8f8b532bfb963bf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:25,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:25,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:25,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:25,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:25,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:25,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:25,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:25,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:25,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:25,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:25,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:25,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:25,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:25,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:25,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:25,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:25,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:25,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:25,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:25,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:25,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:25,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:25,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:25,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:25,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:25,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:25,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:25,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:25,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:25,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:25,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:25,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:25,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:25,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:25,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:25,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:25,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:25,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:25,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:25,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:25,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:04:25,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:25,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:25,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:25,487 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:25,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:25,487 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:25,487 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:25,487 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:25,487 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:25,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:25,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:04:25,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:04:25,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:25,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:25,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:25,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:25,491 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:25,491 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:04:25,491 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:04:25,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:04:25,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:25,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:25,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:25,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:25,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:04:25,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:25,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:25,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:25,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:25,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:25,494 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:04:25,494 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:25,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:25,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:25,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:25,495 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_1797ad8f-2be7-451b-9708-e32cecf83287/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d912bb29f92146b3af89aaec6570a3971933bc9b9284807c8f8b532bfb963bf [2021-11-07 02:04:25,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:25,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:25,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:25,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:25,922 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:25,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product17.cil.c [2021-11-07 02:04:26,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/ef049e931/1d6eba1af4f04bfe8fdc07a8e27e0529/FLAGab501ef7f [2021-11-07 02:04:26,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:26,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/sv-benchmarks/c/product-lines/email_spec27_product17.cil.c [2021-11-07 02:04:26,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/ef049e931/1d6eba1af4f04bfe8fdc07a8e27e0529/FLAGab501ef7f [2021-11-07 02:04:26,931 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/data/ef049e931/1d6eba1af4f04bfe8fdc07a8e27e0529 [2021-11-07 02:04:26,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:26,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:26,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:26,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:26,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:26,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:26" (1/1) ... [2021-11-07 02:04:26,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72849357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:26, skipping insertion in model container [2021-11-07 02:04:26,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:26" (1/1) ... [2021-11-07 02:04:26,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:27,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:27,575 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_1797ad8f-2be7-451b-9708-e32cecf83287/sv-benchmarks/c/product-lines/email_spec27_product17.cil.c[18815,18828] [2021-11-07 02:04:27,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:27,842 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:04:27,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:27,930 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_1797ad8f-2be7-451b-9708-e32cecf83287/sv-benchmarks/c/product-lines/email_spec27_product17.cil.c[18815,18828] [2021-11-07 02:04:28,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:28,026 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:04:28,059 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_1797ad8f-2be7-451b-9708-e32cecf83287/sv-benchmarks/c/product-lines/email_spec27_product17.cil.c[18815,18828] [2021-11-07 02:04:28,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:28,145 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:04:28,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28 WrapperNode [2021-11-07 02:04:28,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:28,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:28,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:04:28,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:04:28,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:28,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:04:28,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:04:28,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:04:28,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:04:28,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:04:28,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:04:28,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:04:28,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (1/1) ... [2021-11-07 02:04:28,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:28,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:28,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:04:28,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:04:28,578 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:04:28,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:04:28,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:04:28,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:04:28,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:04:33,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:04:33,725 INFO L299 CfgBuilder]: Removed 449 assume(true) statements. [2021-11-07 02:04:33,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:33 BoogieIcfgContainer [2021-11-07 02:04:33,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:04:33,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:04:33,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:04:33,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:04:33,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:04:26" (1/3) ... [2021-11-07 02:04:33,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723d79a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:33, skipping insertion in model container [2021-11-07 02:04:33,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:28" (2/3) ... [2021-11-07 02:04:33,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723d79a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:33, skipping insertion in model container [2021-11-07 02:04:33,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:33" (3/3) ... [2021-11-07 02:04:33,735 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product17.cil.c [2021-11-07 02:04:33,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:04:33,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:04:33,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:04:33,819 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 02:04:33,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:04:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 776 states, 769 states have (on average 1.7802340702210664) internal successors, (1369), 775 states have internal predecessors, (1369), 0 states have call successors, (0), 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 02:04:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:04:33,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:33,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:33,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash 660911585, now seen corresponding path program 1 times [2021-11-07 02:04:33,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:33,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698866498] [2021-11-07 02:04:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:33,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:33,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:33,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:04:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:34,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:04:34,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:34,525 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 02:04:34,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:34,677 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 02:04:34,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:34,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698866498] [2021-11-07 02:04:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698866498] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:34,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:34,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:04:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324357702] [2021-11-07 02:04:34,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:04:34,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:34,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:04:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:34,709 INFO L87 Difference]: Start difference. First operand has 776 states, 769 states have (on average 1.7802340702210664) internal successors, (1369), 775 states have internal predecessors, (1369), 0 states have call successors, (0), 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 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:04:34,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:34,808 INFO L93 Difference]: Finished difference Result 1271 states and 2222 transitions. [2021-11-07 02:04:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:04:34,810 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:04:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:34,837 INFO L225 Difference]: With dead ends: 1271 [2021-11-07 02:04:34,837 INFO L226 Difference]: Without dead ends: 770 [2021-11-07 02:04:34,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 100 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 02:04:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-07 02:04:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 770. [2021-11-07 02:04:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 764 states have (on average 1.7670157068062826) internal successors, (1350), 769 states have internal predecessors, (1350), 0 states have call successors, (0), 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 02:04:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1350 transitions. [2021-11-07 02:04:34,942 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1350 transitions. Word has length 51 [2021-11-07 02:04:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1350 transitions. [2021-11-07 02:04:34,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 02:04:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1350 transitions. [2021-11-07 02:04:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:04:34,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:34,947 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 02:04:34,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:35,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:35,159 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1789304684, now seen corresponding path program 1 times [2021-11-07 02:04:35,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:35,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444161914] [2021-11-07 02:04:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:35,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:35,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:35,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:35,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:04:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:04:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:35,732 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 02:04:35,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:35,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:35,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444161914] [2021-11-07 02:04:35,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444161914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:35,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:35,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:35,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004200913] [2021-11-07 02:04:35,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:35,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:35,890 INFO L87 Difference]: Start difference. First operand 770 states and 1350 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:36,010 INFO L93 Difference]: Finished difference Result 2280 states and 4002 transitions. [2021-11-07 02:04:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:04:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:36,022 INFO L225 Difference]: With dead ends: 2280 [2021-11-07 02:04:36,022 INFO L226 Difference]: Without dead ends: 1525 [2021-11-07 02:04:36,024 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 02:04:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-11-07 02:04:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 769. [2021-11-07 02:04:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 763 states have (on average 1.7627785058977719) internal successors, (1345), 768 states have internal predecessors, (1345), 0 states have call successors, (0), 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 02:04:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1345 transitions. [2021-11-07 02:04:36,073 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1345 transitions. Word has length 52 [2021-11-07 02:04:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:36,074 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 1345 transitions. [2021-11-07 02:04:36,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1345 transitions. [2021-11-07 02:04:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:04:36,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:36,077 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:36,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:36,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:36,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1714013330, now seen corresponding path program 1 times [2021-11-07 02:04:36,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:36,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145922907] [2021-11-07 02:04:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:36,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:36,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:36,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:04:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:36,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:04:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:36,864 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 02:04:36,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:37,026 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 02:04:37,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:37,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145922907] [2021-11-07 02:04:37,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145922907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:37,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:37,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:37,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012957772] [2021-11-07 02:04:37,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:37,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:37,029 INFO L87 Difference]: Start difference. First operand 769 states and 1345 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:37,333 INFO L93 Difference]: Finished difference Result 2993 states and 5242 transitions. [2021-11-07 02:04:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:37,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:04:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:37,349 INFO L225 Difference]: With dead ends: 2993 [2021-11-07 02:04:37,349 INFO L226 Difference]: Without dead ends: 2242 [2021-11-07 02:04:37,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 02:04:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-11-07 02:04:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 768. [2021-11-07 02:04:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 762 states have (on average 1.7598425196850394) internal successors, (1341), 767 states have internal predecessors, (1341), 0 states have call successors, (0), 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 02:04:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1341 transitions. [2021-11-07 02:04:37,410 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1341 transitions. Word has length 54 [2021-11-07 02:04:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:37,411 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1341 transitions. [2021-11-07 02:04:37,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1341 transitions. [2021-11-07 02:04:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:04:37,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:37,414 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 02:04:37,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:37,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:37,631 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1255376133, now seen corresponding path program 1 times [2021-11-07 02:04:37,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:37,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433172541] [2021-11-07 02:04:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:37,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:37,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:37,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:04:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:38,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:04:38,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:38,199 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 02:04:38,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:38,356 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 02:04:38,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:38,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433172541] [2021-11-07 02:04:38,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433172541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:38,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:38,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:38,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441687179] [2021-11-07 02:04:38,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:38,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:38,358 INFO L87 Difference]: Start difference. First operand 768 states and 1341 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 02:04:38,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:38,455 INFO L93 Difference]: Finished difference Result 1533 states and 2679 transitions. [2021-11-07 02:04:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 02:04:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:38,461 INFO L225 Difference]: With dead ends: 1533 [2021-11-07 02:04:38,461 INFO L226 Difference]: Without dead ends: 773 [2021-11-07 02:04:38,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-11-07 02:04:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 768. [2021-11-07 02:04:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 762 states have (on average 1.7559055118110236) internal successors, (1338), 767 states have internal predecessors, (1338), 0 states have call successors, (0), 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 02:04:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1338 transitions. [2021-11-07 02:04:38,520 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1338 transitions. Word has length 55 [2021-11-07 02:04:38,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:38,522 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1338 transitions. [2021-11-07 02:04:38,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 02:04:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1338 transitions. [2021-11-07 02:04:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:04:38,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:38,525 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 02:04:38,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:38,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:38,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash -349177978, now seen corresponding path program 1 times [2021-11-07 02:04:38,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:38,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025760185] [2021-11-07 02:04:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:38,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:38,742 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:38,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:04:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:04:39,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:39,307 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 02:04:39,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:39,467 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 02:04:39,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:39,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025760185] [2021-11-07 02:04:39,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025760185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:39,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:39,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:39,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921084985] [2021-11-07 02:04:39,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:39,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:39,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:39,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:39,470 INFO L87 Difference]: Start difference. First operand 768 states and 1338 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 02:04:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:39,790 INFO L93 Difference]: Finished difference Result 2980 states and 5218 transitions. [2021-11-07 02:04:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 56 [2021-11-07 02:04:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:39,804 INFO L225 Difference]: With dead ends: 2980 [2021-11-07 02:04:39,805 INFO L226 Difference]: Without dead ends: 2238 [2021-11-07 02:04:39,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 02:04:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-11-07 02:04:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 768. [2021-11-07 02:04:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 762 states have (on average 1.7519685039370079) internal successors, (1335), 767 states have internal predecessors, (1335), 0 states have call successors, (0), 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 02:04:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1335 transitions. [2021-11-07 02:04:39,874 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1335 transitions. Word has length 56 [2021-11-07 02:04:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:39,874 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1335 transitions. [2021-11-07 02:04:39,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 02:04:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1335 transitions. [2021-11-07 02:04:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:04:39,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:39,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:39,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:04:40,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:40,091 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1329790805, now seen corresponding path program 1 times [2021-11-07 02:04:40,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:40,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763817060] [2021-11-07 02:04:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:40,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:40,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:40,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:40,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:04:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:40,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:40,683 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 02:04:40,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:40,825 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 02:04:40,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:40,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763817060] [2021-11-07 02:04:40,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763817060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:40,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:40,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:40,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724421200] [2021-11-07 02:04:40,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:40,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:40,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:40,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:40,828 INFO L87 Difference]: Start difference. First operand 768 states and 1335 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 02:04:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:40,953 INFO L93 Difference]: Finished difference Result 1999 states and 3477 transitions. [2021-11-07 02:04:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:04:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:40,963 INFO L225 Difference]: With dead ends: 1999 [2021-11-07 02:04:40,963 INFO L226 Difference]: Without dead ends: 1510 [2021-11-07 02:04:40,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 02:04:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-11-07 02:04:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1021. [2021-11-07 02:04:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1015 states have (on average 1.7743842364532019) internal successors, (1801), 1020 states have internal predecessors, (1801), 0 states have call successors, (0), 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 02:04:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1801 transitions. [2021-11-07 02:04:41,048 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1801 transitions. Word has length 58 [2021-11-07 02:04:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:41,049 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1801 transitions. [2021-11-07 02:04:41,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 02:04:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1801 transitions. [2021-11-07 02:04:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:04:41,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:41,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:41,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:41,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:41,266 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1798413786, now seen corresponding path program 1 times [2021-11-07 02:04:41,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:41,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332973688] [2021-11-07 02:04:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:41,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:41,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:41,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:04:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:41,860 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 02:04:41,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:42,041 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 02:04:42,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:42,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332973688] [2021-11-07 02:04:42,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332973688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:42,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:42,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:42,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274215099] [2021-11-07 02:04:42,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:42,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:42,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:42,046 INFO L87 Difference]: Start difference. First operand 1021 states and 1801 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:42,210 INFO L93 Difference]: Finished difference Result 2648 states and 4676 transitions. [2021-11-07 02:04:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:04:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:42,223 INFO L225 Difference]: With dead ends: 2648 [2021-11-07 02:04:42,223 INFO L226 Difference]: Without dead ends: 1711 [2021-11-07 02:04:42,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 02:04:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-11-07 02:04:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1222. [2021-11-07 02:04:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1216 states have (on average 1.7845394736842106) internal successors, (2170), 1221 states have internal predecessors, (2170), 0 states have call successors, (0), 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 02:04:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 2170 transitions. [2021-11-07 02:04:42,323 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 2170 transitions. Word has length 70 [2021-11-07 02:04:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:42,326 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 2170 transitions. [2021-11-07 02:04:42,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 2170 transitions. [2021-11-07 02:04:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:04:42,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:42,329 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 02:04:42,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:42,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:42,545 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash -753977061, now seen corresponding path program 1 times [2021-11-07 02:04:42,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:42,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324366088] [2021-11-07 02:04:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:42,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:42,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:42,553 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:42,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:04:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:43,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:43,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:43,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:43,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324366088] [2021-11-07 02:04:43,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324366088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:43,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:43,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:43,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107464117] [2021-11-07 02:04:43,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:43,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:43,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:43,525 INFO L87 Difference]: Start difference. First operand 1222 states and 2170 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 02:04:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:43,725 INFO L93 Difference]: Finished difference Result 3295 states and 5869 transitions. [2021-11-07 02:04:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:43,726 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 02:04:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:43,743 INFO L225 Difference]: With dead ends: 3295 [2021-11-07 02:04:43,743 INFO L226 Difference]: Without dead ends: 2161 [2021-11-07 02:04:43,747 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 02:04:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-11-07 02:04:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1672. [2021-11-07 02:04:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1666 states have (on average 1.7995198079231693) internal successors, (2998), 1671 states have internal predecessors, (2998), 0 states have call successors, (0), 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 02:04:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2998 transitions. [2021-11-07 02:04:43,899 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2998 transitions. Word has length 71 [2021-11-07 02:04:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:43,899 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2998 transitions. [2021-11-07 02:04:43,900 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 02:04:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2998 transitions. [2021-11-07 02:04:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:04:43,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:43,904 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:43,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:44,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:44,121 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2116337845, now seen corresponding path program 1 times [2021-11-07 02:04:44,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:44,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872602231] [2021-11-07 02:04:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:44,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:44,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:44,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:04:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:44,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:44,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:44,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872602231] [2021-11-07 02:04:44,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872602231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:44,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:44,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:44,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478266696] [2021-11-07 02:04:44,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:44,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:44,945 INFO L87 Difference]: Start difference. First operand 1672 states and 2998 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 02:04:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:45,122 INFO L93 Difference]: Finished difference Result 3548 states and 6332 transitions. [2021-11-07 02:04:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 72 [2021-11-07 02:04:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:45,136 INFO L225 Difference]: With dead ends: 3548 [2021-11-07 02:04:45,136 INFO L226 Difference]: Without dead ends: 2161 [2021-11-07 02:04:45,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 02:04:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-11-07 02:04:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1672. [2021-11-07 02:04:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1666 states have (on average 1.7983193277310925) internal successors, (2996), 1671 states have internal predecessors, (2996), 0 states have call successors, (0), 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 02:04:45,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2996 transitions. [2021-11-07 02:04:45,286 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2996 transitions. Word has length 72 [2021-11-07 02:04:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:45,287 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2996 transitions. [2021-11-07 02:04:45,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 02:04:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2996 transitions. [2021-11-07 02:04:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:04:45,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:45,291 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 02:04:45,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:45,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:45,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:45,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1787134444, now seen corresponding path program 1 times [2021-11-07 02:04:45,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:45,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054679292] [2021-11-07 02:04:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:45,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:45,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:45,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:45,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:04:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:46,186 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 02:04:46,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:46,364 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 02:04:46,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:46,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054679292] [2021-11-07 02:04:46,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054679292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:46,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:46,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:46,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916912814] [2021-11-07 02:04:46,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:46,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:46,367 INFO L87 Difference]: Start difference. First operand 1672 states and 2996 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 02:04:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:46,572 INFO L93 Difference]: Finished difference Result 4617 states and 8302 transitions. [2021-11-07 02:04:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:46,573 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 02:04:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:46,593 INFO L225 Difference]: With dead ends: 4617 [2021-11-07 02:04:46,593 INFO L226 Difference]: Without dead ends: 3041 [2021-11-07 02:04:46,596 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 02:04:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-11-07 02:04:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2552. [2021-11-07 02:04:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2546 states have (on average 1.8126472898664572) internal successors, (4615), 2551 states have internal predecessors, (4615), 0 states have call successors, (0), 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 02:04:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4615 transitions. [2021-11-07 02:04:46,809 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4615 transitions. Word has length 72 [2021-11-07 02:04:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:46,810 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 4615 transitions. [2021-11-07 02:04:46,810 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 02:04:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4615 transitions. [2021-11-07 02:04:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:04:46,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:46,816 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 02:04:46,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:47,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:47,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2043132953, now seen corresponding path program 1 times [2021-11-07 02:04:47,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:47,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905522547] [2021-11-07 02:04:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:47,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:47,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:47,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:47,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:04:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:47,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:47,752 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 02:04:47,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:47,925 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 02:04:47,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:47,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905522547] [2021-11-07 02:04:47,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905522547] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:47,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:47,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:47,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578878931] [2021-11-07 02:04:47,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:47,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:47,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:47,928 INFO L87 Difference]: Start difference. First operand 2552 states and 4615 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 02:04:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:48,217 INFO L93 Difference]: Finished difference Result 6993 states and 12678 transitions. [2021-11-07 02:04:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:48,217 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 02:04:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:48,270 INFO L225 Difference]: With dead ends: 6993 [2021-11-07 02:04:48,273 INFO L226 Difference]: Without dead ends: 4571 [2021-11-07 02:04:48,277 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 02:04:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-11-07 02:04:48,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4082. [2021-11-07 02:04:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4082 states, 4076 states have (on average 1.8223748773307165) internal successors, (7428), 4081 states have internal predecessors, (7428), 0 states have call successors, (0), 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 02:04:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4082 states to 4082 states and 7428 transitions. [2021-11-07 02:04:48,579 INFO L78 Accepts]: Start accepts. Automaton has 4082 states and 7428 transitions. Word has length 73 [2021-11-07 02:04:48,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:48,581 INFO L470 AbstractCegarLoop]: Abstraction has 4082 states and 7428 transitions. [2021-11-07 02:04:48,581 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 02:04:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4082 states and 7428 transitions. [2021-11-07 02:04:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:04:48,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:48,590 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 02:04:48,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:48,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:48,811 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:48,811 INFO L85 PathProgramCache]: Analyzing trace with hash -310330309, now seen corresponding path program 1 times [2021-11-07 02:04:48,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:48,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121703428] [2021-11-07 02:04:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:48,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:48,813 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:48,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:04:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:49,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:49,491 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 02:04:49,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:49,665 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 02:04:49,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:49,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121703428] [2021-11-07 02:04:49,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121703428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:49,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:49,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:49,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463428489] [2021-11-07 02:04:49,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:49,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:49,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:49,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:49,668 INFO L87 Difference]: Start difference. First operand 4082 states and 7428 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 02:04:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:50,070 INFO L93 Difference]: Finished difference Result 11299 states and 20600 transitions. [2021-11-07 02:04:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:50,071 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 02:04:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:50,090 INFO L225 Difference]: With dead ends: 11299 [2021-11-07 02:04:50,091 INFO L226 Difference]: Without dead ends: 7381 [2021-11-07 02:04:50,097 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 02:04:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-11-07 02:04:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 6892. [2021-11-07 02:04:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6892 states, 6886 states have (on average 1.8282021492884113) internal successors, (12589), 6891 states have internal predecessors, (12589), 0 states have call successors, (0), 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 02:04:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6892 states to 6892 states and 12589 transitions. [2021-11-07 02:04:50,606 INFO L78 Accepts]: Start accepts. Automaton has 6892 states and 12589 transitions. Word has length 74 [2021-11-07 02:04:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:50,610 INFO L470 AbstractCegarLoop]: Abstraction has 6892 states and 12589 transitions. [2021-11-07 02:04:50,611 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 02:04:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states and 12589 transitions. [2021-11-07 02:04:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:04:50,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:50,620 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] [2021-11-07 02:04:50,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:50,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:50,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:50,836 INFO L85 PathProgramCache]: Analyzing trace with hash 654064503, now seen corresponding path program 1 times [2021-11-07 02:04:50,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:50,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794256557] [2021-11-07 02:04:50,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:50,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:50,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:50,838 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:50,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:04:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:51,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:51,616 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 02:04:51,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:51,851 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 02:04:51,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:51,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794256557] [2021-11-07 02:04:51,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794256557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:51,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:51,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:51,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925046732] [2021-11-07 02:04:51,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:51,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:51,853 INFO L87 Difference]: Start difference. First operand 6892 states and 12589 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:04:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:55,106 INFO L93 Difference]: Finished difference Result 26091 states and 47712 transitions. [2021-11-07 02:04:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:55,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:04:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:55,163 INFO L225 Difference]: With dead ends: 26091 [2021-11-07 02:04:55,164 INFO L226 Difference]: Without dead ends: 19482 [2021-11-07 02:04:55,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 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 02:04:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19482 states. [2021-11-07 02:04:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19482 to 6842. [2021-11-07 02:04:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6836 states have (on average 1.8123171445289643) internal successors, (12389), 6841 states have internal predecessors, (12389), 0 states have call successors, (0), 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 02:04:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 12389 transitions. [2021-11-07 02:04:55,681 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 12389 transitions. Word has length 75 [2021-11-07 02:04:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:55,681 INFO L470 AbstractCegarLoop]: Abstraction has 6842 states and 12389 transitions. [2021-11-07 02:04:55,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:04:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 12389 transitions. [2021-11-07 02:04:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:04:55,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:55,690 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 02:04:55,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:55,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:55,903 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash 57680968, now seen corresponding path program 1 times [2021-11-07 02:04:55,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:55,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133592627] [2021-11-07 02:04:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:55,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:55,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:55,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:04:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:56,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:56,833 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 02:04:56,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:57,028 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 02:04:57,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:57,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133592627] [2021-11-07 02:04:57,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133592627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:57,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:57,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:57,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544648137] [2021-11-07 02:04:57,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:57,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:57,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:57,032 INFO L87 Difference]: Start difference. First operand 6842 states and 12389 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 02:04:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:57,651 INFO L93 Difference]: Finished difference Result 20040 states and 36337 transitions. [2021-11-07 02:04:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:57,651 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 02:04:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:57,694 INFO L225 Difference]: With dead ends: 20040 [2021-11-07 02:04:57,694 INFO L226 Difference]: Without dead ends: 13365 [2021-11-07 02:04:57,706 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 02:04:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13365 states. [2021-11-07 02:04:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13365 to 12876. [2021-11-07 02:04:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12876 states, 12870 states have (on average 1.8142968142968143) internal successors, (23350), 12875 states have internal predecessors, (23350), 0 states have call successors, (0), 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 02:04:58,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12876 states to 12876 states and 23350 transitions. [2021-11-07 02:04:58,341 INFO L78 Accepts]: Start accepts. Automaton has 12876 states and 23350 transitions. Word has length 75 [2021-11-07 02:04:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:58,342 INFO L470 AbstractCegarLoop]: Abstraction has 12876 states and 23350 transitions. [2021-11-07 02:04:58,342 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 02:04:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 12876 states and 23350 transitions. [2021-11-07 02:04:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:04:58,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:58,446 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] [2021-11-07 02:04:58,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:58,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:58,655 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:04:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 432217756, now seen corresponding path program 1 times [2021-11-07 02:04:58,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:58,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176844412] [2021-11-07 02:04:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:58,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:58,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:58,657 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:58,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:04:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:59,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:04:59,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:59,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:59,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:59,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176844412] [2021-11-07 02:04:59,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176844412] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:04:59,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912824487] [2021-11-07 02:04:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:59,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:59,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:04:59,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:04:59,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:05:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:05:00,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:00,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:01,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1912824487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:01,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:01,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:05:01,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582224527] [2021-11-07 02:05:01,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:05:01,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:05:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:05:01,212 INFO L87 Difference]: Start difference. First operand 12876 states and 23350 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 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 02:05:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:06,811 INFO L93 Difference]: Finished difference Result 79588 states and 144683 transitions. [2021-11-07 02:05:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 02:05:06,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 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 02:05:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:07,018 INFO L225 Difference]: With dead ends: 79588 [2021-11-07 02:05:07,018 INFO L226 Difference]: Without dead ends: 79117 [2021-11-07 02:05:07,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:05:07,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79117 states. [2021-11-07 02:05:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79117 to 25502. [2021-11-07 02:05:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25496 states have (on average 1.8151474741135865) internal successors, (46279), 25501 states have internal predecessors, (46279), 0 states have call successors, (0), 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 02:05:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 46279 transitions. [2021-11-07 02:05:09,433 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 46279 transitions. Word has length 76 [2021-11-07 02:05:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:09,433 INFO L470 AbstractCegarLoop]: Abstraction has 25502 states and 46279 transitions. [2021-11-07 02:05:09,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 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 02:05:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 46279 transitions. [2021-11-07 02:05:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:05:09,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:09,474 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] [2021-11-07 02:05:09,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:09,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-07 02:05:09,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:09,891 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 548685817, now seen corresponding path program 1 times [2021-11-07 02:05:09,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:09,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510574093] [2021-11-07 02:05:09,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:09,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:09,893 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:09,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:05:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:10,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:10,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:11,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:11,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510574093] [2021-11-07 02:05:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510574093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:11,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733802743] [2021-11-07 02:05:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:11,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:11,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:05:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:05:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:12,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733802743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:12,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:12,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:05:12,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875813250] [2021-11-07 02:05:12,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:05:12,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:12,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:05:12,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:05:12,468 INFO L87 Difference]: Start difference. First operand 25502 states and 46279 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 02:05:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:15,779 INFO L93 Difference]: Finished difference Result 26450 states and 47909 transitions. [2021-11-07 02:05:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:05:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 77 [2021-11-07 02:05:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:15,825 INFO L225 Difference]: With dead ends: 26450 [2021-11-07 02:05:15,825 INFO L226 Difference]: Without dead ends: 25730 [2021-11-07 02:05:15,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:05:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25730 states. [2021-11-07 02:05:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25730 to 25496. [2021-11-07 02:05:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25496 states, 25490 states have (on average 1.8150647312671635) internal successors, (46266), 25495 states have internal predecessors, (46266), 0 states have call successors, (0), 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 02:05:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25496 states to 25496 states and 46266 transitions. [2021-11-07 02:05:17,129 INFO L78 Accepts]: Start accepts. Automaton has 25496 states and 46266 transitions. Word has length 77 [2021-11-07 02:05:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:17,129 INFO L470 AbstractCegarLoop]: Abstraction has 25496 states and 46266 transitions. [2021-11-07 02:05:17,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 02:05:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 25496 states and 46266 transitions. [2021-11-07 02:05:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:05:17,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:17,146 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] [2021-11-07 02:05:17,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 02:05:17,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:05:17,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:17,547 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:17,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1741256521, now seen corresponding path program 1 times [2021-11-07 02:05:17,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:17,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325716048] [2021-11-07 02:05:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:17,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:17,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:17,549 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:17,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:05:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:05:18,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:18,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:18,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:18,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325716048] [2021-11-07 02:05:18,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325716048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:18,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:18,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:05:18,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123774039] [2021-11-07 02:05:18,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:18,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:18,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:18,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:18,649 INFO L87 Difference]: Start difference. First operand 25496 states and 46266 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 02:05:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:20,161 INFO L93 Difference]: Finished difference Result 50192 states and 91298 transitions. [2021-11-07 02:05:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 77 [2021-11-07 02:05:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:20,201 INFO L225 Difference]: With dead ends: 50192 [2021-11-07 02:05:20,201 INFO L226 Difference]: Without dead ends: 24982 [2021-11-07 02:05:20,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:05:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24982 states. [2021-11-07 02:05:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24982 to 12874. [2021-11-07 02:05:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12874 states, 12868 states have (on average 1.8138793907367112) internal successors, (23341), 12873 states have internal predecessors, (23341), 0 states have call successors, (0), 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 02:05:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12874 states to 12874 states and 23341 transitions. [2021-11-07 02:05:21,118 INFO L78 Accepts]: Start accepts. Automaton has 12874 states and 23341 transitions. Word has length 77 [2021-11-07 02:05:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:21,119 INFO L470 AbstractCegarLoop]: Abstraction has 12874 states and 23341 transitions. [2021-11-07 02:05:21,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 02:05:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 12874 states and 23341 transitions. [2021-11-07 02:05:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:05:21,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:21,128 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 02:05:21,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:21,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:21,331 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:21,331 INFO L85 PathProgramCache]: Analyzing trace with hash 487112395, now seen corresponding path program 1 times [2021-11-07 02:05:21,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:21,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660273128] [2021-11-07 02:05:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:21,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:21,333 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:21,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:05:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:22,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:22,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:22,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660273128] [2021-11-07 02:05:22,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660273128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:22,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [845894075] [2021-11-07 02:05:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:22,536 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:22,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:22,537 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:22,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:05:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:23,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:05:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:23,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:23,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [845894075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:23,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:23,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 02:05:23,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923152978] [2021-11-07 02:05:23,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:05:23,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:05:23,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:05:23,987 INFO L87 Difference]: Start difference. First operand 12874 states and 23341 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 02:05:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:24,712 INFO L93 Difference]: Finished difference Result 13241 states and 23964 transitions. [2021-11-07 02:05:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:05:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 79 [2021-11-07 02:05:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:24,733 INFO L225 Difference]: With dead ends: 13241 [2021-11-07 02:05:24,733 INFO L226 Difference]: Without dead ends: 12874 [2021-11-07 02:05:24,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:05:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12874 states. [2021-11-07 02:05:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12874 to 12874. [2021-11-07 02:05:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12874 states, 12868 states have (on average 1.8134131178116257) internal successors, (23335), 12873 states have internal predecessors, (23335), 0 states have call successors, (0), 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 02:05:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12874 states to 12874 states and 23335 transitions. [2021-11-07 02:05:25,735 INFO L78 Accepts]: Start accepts. Automaton has 12874 states and 23335 transitions. Word has length 79 [2021-11-07 02:05:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:25,735 INFO L470 AbstractCegarLoop]: Abstraction has 12874 states and 23335 transitions. [2021-11-07 02:05:25,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 02:05:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 12874 states and 23335 transitions. [2021-11-07 02:05:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:05:25,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:25,747 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, 1, 1, 1] [2021-11-07 02:05:25,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:25,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:26,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:26,148 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash 413753353, now seen corresponding path program 1 times [2021-11-07 02:05:26,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:26,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447104074] [2021-11-07 02:05:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:26,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:26,150 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:26,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:05:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:27,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:27,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:27,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447104074] [2021-11-07 02:05:27,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447104074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:27,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2124016716] [2021-11-07 02:05:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:27,572 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:27,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:27,574 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:27,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:05:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:28,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:05:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:28,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:29,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2124016716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:29,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:29,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 02:05:29,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733956349] [2021-11-07 02:05:29,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:05:29,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:29,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:05:29,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:05:29,212 INFO L87 Difference]: Start difference. First operand 12874 states and 23335 transitions. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:05:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:32,428 INFO L93 Difference]: Finished difference Result 14622 states and 26279 transitions. [2021-11-07 02:05:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:05:32,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:05:32,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:32,446 INFO L225 Difference]: With dead ends: 14622 [2021-11-07 02:05:32,446 INFO L226 Difference]: Without dead ends: 14255 [2021-11-07 02:05:32,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:05:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2021-11-07 02:05:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 13258. [2021-11-07 02:05:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13258 states, 13252 states have (on average 1.8102173256866887) internal successors, (23989), 13257 states have internal predecessors, (23989), 0 states have call successors, (0), 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 02:05:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13258 states to 13258 states and 23989 transitions. [2021-11-07 02:05:33,103 INFO L78 Accepts]: Start accepts. Automaton has 13258 states and 23989 transitions. Word has length 82 [2021-11-07 02:05:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:33,103 INFO L470 AbstractCegarLoop]: Abstraction has 13258 states and 23989 transitions. [2021-11-07 02:05:33,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:05:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 13258 states and 23989 transitions. [2021-11-07 02:05:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:05:33,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:33,116 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, 1, 1, 1, 1] [2021-11-07 02:05:33,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:33,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:33,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:33,517 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1414812491, now seen corresponding path program 1 times [2021-11-07 02:05:33,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:33,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007069853] [2021-11-07 02:05:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:33,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:33,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:33,519 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:33,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:05:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:34,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:34,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:34,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:34,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007069853] [2021-11-07 02:05:34,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007069853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:34,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1313808392] [2021-11-07 02:05:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:34,992 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:34,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:34,998 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:35,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:05:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 02:05:36,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:36,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:36,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1313808392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:36,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:36,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-07 02:05:36,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501699386] [2021-11-07 02:05:36,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:05:36,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:36,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:05:36,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:05:36,841 INFO L87 Difference]: Start difference. First operand 13258 states and 23989 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 02:05:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:37,917 INFO L93 Difference]: Finished difference Result 14236 states and 25658 transitions. [2021-11-07 02:05:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 02:05:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 83 [2021-11-07 02:05:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:37,936 INFO L225 Difference]: With dead ends: 14236 [2021-11-07 02:05:37,936 INFO L226 Difference]: Without dead ends: 13490 [2021-11-07 02:05:37,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:05:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13490 states. [2021-11-07 02:05:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13490 to 13246. [2021-11-07 02:05:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13246 states, 13240 states have (on average 1.8098187311178249) internal successors, (23962), 13245 states have internal predecessors, (23962), 0 states have call successors, (0), 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 02:05:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13246 states to 13246 states and 23962 transitions. [2021-11-07 02:05:38,776 INFO L78 Accepts]: Start accepts. Automaton has 13246 states and 23962 transitions. Word has length 83 [2021-11-07 02:05:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:38,777 INFO L470 AbstractCegarLoop]: Abstraction has 13246 states and 23962 transitions. [2021-11-07 02:05:38,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 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 02:05:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13246 states and 23962 transitions. [2021-11-07 02:05:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:05:38,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:38,788 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, 1, 1, 1, 1] [2021-11-07 02:05:38,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:38,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:39,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:39,190 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2038902688, now seen corresponding path program 1 times [2021-11-07 02:05:39,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:39,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586516113] [2021-11-07 02:05:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:39,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:39,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:39,193 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:39,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:05:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:40,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:40,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:40,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586516113] [2021-11-07 02:05:40,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586516113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:40,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304942614] [2021-11-07 02:05:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:40,606 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:40,607 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:40,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:05:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:05:41,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:42,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304942614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:42,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:42,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 02:05:42,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356027398] [2021-11-07 02:05:42,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:42,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:05:42,418 INFO L87 Difference]: Start difference. First operand 13246 states and 23962 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 02:05:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:43,223 INFO L93 Difference]: Finished difference Result 13724 states and 24759 transitions. [2021-11-07 02:05:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:05:43,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 83 [2021-11-07 02:05:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:43,243 INFO L225 Difference]: With dead ends: 13724 [2021-11-07 02:05:43,243 INFO L226 Difference]: Without dead ends: 13112 [2021-11-07 02:05:43,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:05:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13112 states. [2021-11-07 02:05:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13112 to 12876. [2021-11-07 02:05:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12876 states, 12870 states have (on average 1.8124320124320124) internal successors, (23326), 12875 states have internal predecessors, (23326), 0 states have call successors, (0), 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 02:05:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12876 states to 12876 states and 23326 transitions. [2021-11-07 02:05:43,930 INFO L78 Accepts]: Start accepts. Automaton has 12876 states and 23326 transitions. Word has length 83 [2021-11-07 02:05:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:43,930 INFO L470 AbstractCegarLoop]: Abstraction has 12876 states and 23326 transitions. [2021-11-07 02:05:43,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 02:05:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 12876 states and 23326 transitions. [2021-11-07 02:05:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:05:43,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:43,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:43,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:44,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:44,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:44,344 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:05:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1071970516, now seen corresponding path program 1 times [2021-11-07 02:05:44,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:44,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308018878] [2021-11-07 02:05:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:44,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:44,347 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:44,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:05:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:45,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:45,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:45,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:45,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:45,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308018878] [2021-11-07 02:05:45,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308018878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:05:45,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030167308] [2021-11-07 02:05:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:45,926 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:45,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:05:45,927 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:05:45,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:05:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 02:05:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:47,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:05:48,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1030167308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:48,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:05:48,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 02:05:48,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53600925] [2021-11-07 02:05:48,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:05:48,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:05:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:05:48,300 INFO L87 Difference]: Start difference. First operand 12876 states and 23326 transitions. Second operand has 16 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:59,100 INFO L93 Difference]: Finished difference Result 20315 states and 35381 transitions. [2021-11-07 02:05:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 02:05:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 02:05:59,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:59,126 INFO L225 Difference]: With dead ends: 20315 [2021-11-07 02:05:59,126 INFO L226 Difference]: Without dead ends: 19911 [2021-11-07 02:05:59,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2528, Invalid=10582, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 02:05:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19911 states. [2021-11-07 02:05:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19911 to 13446. [2021-11-07 02:05:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13446 states, 13440 states have (on average 1.8010416666666667) internal successors, (24206), 13445 states have internal predecessors, (24206), 0 states have call successors, (0), 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 02:05:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13446 states to 13446 states and 24206 transitions. [2021-11-07 02:05:59,940 INFO L78 Accepts]: Start accepts. Automaton has 13446 states and 24206 transitions. Word has length 89 [2021-11-07 02:05:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:59,940 INFO L470 AbstractCegarLoop]: Abstraction has 13446 states and 24206 transitions. [2021-11-07 02:05:59,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 16 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 13446 states and 24206 transitions. [2021-11-07 02:05:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 02:05:59,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:59,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:59,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 02:06:00,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:00,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:00,357 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:00,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1193190364, now seen corresponding path program 1 times [2021-11-07 02:06:00,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:00,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887101526] [2021-11-07 02:06:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:00,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:00,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:00,359 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:00,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:06:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:01,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:01,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:01,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:02,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:02,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887101526] [2021-11-07 02:06:02,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887101526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:02,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009060604] [2021-11-07 02:06:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:02,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:02,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:02,124 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:02,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:06:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:03,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2009060604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:04,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:04,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:06:04,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917365213] [2021-11-07 02:06:04,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:04,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:06:04,066 INFO L87 Difference]: Start difference. First operand 13446 states and 24206 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:04,773 INFO L93 Difference]: Finished difference Result 14328 states and 25623 transitions. [2021-11-07 02:06:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 02:06:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:04,794 INFO L225 Difference]: With dead ends: 14328 [2021-11-07 02:06:04,795 INFO L226 Difference]: Without dead ends: 13767 [2021-11-07 02:06:04,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:06:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13767 states. [2021-11-07 02:06:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13767 to 13341. [2021-11-07 02:06:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13341 states, 13335 states have (on average 1.8023247094113235) internal successors, (24034), 13340 states have internal predecessors, (24034), 0 states have call successors, (0), 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 02:06:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13341 states to 13341 states and 24034 transitions. [2021-11-07 02:06:05,626 INFO L78 Accepts]: Start accepts. Automaton has 13341 states and 24034 transitions. Word has length 90 [2021-11-07 02:06:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:05,626 INFO L470 AbstractCegarLoop]: Abstraction has 13341 states and 24034 transitions. [2021-11-07 02:06:05,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 13341 states and 24034 transitions. [2021-11-07 02:06:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 02:06:05,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:05,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:05,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:05,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:06,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:06,036 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1995934105, now seen corresponding path program 1 times [2021-11-07 02:06:06,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:06,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147468724] [2021-11-07 02:06:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:06,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:06,039 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:06,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:06:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:07,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:07,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:07,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:07,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147468724] [2021-11-07 02:06:07,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147468724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:07,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638964665] [2021-11-07 02:06:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:07,742 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:07,743 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:07,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 02:06:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:06:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:10,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:10,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638964665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:10,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:10,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 02:06:10,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60278726] [2021-11-07 02:06:10,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:06:10,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:06:10,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:06:10,991 INFO L87 Difference]: Start difference. First operand 13341 states and 24034 transitions. Second operand has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 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 02:06:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:38,185 INFO L93 Difference]: Finished difference Result 48679 states and 85606 transitions. [2021-11-07 02:06:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 02:06:38,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 02:06:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:38,438 INFO L225 Difference]: With dead ends: 48679 [2021-11-07 02:06:38,438 INFO L226 Difference]: Without dead ends: 47905 [2021-11-07 02:06:38,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=743, Invalid=2563, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 02:06:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47905 states. [2021-11-07 02:06:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47905 to 27475. [2021-11-07 02:06:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27475 states, 27469 states have (on average 1.7956605628162656) internal successors, (49325), 27474 states have internal predecessors, (49325), 0 states have call successors, (0), 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 02:06:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27475 states to 27475 states and 49325 transitions. [2021-11-07 02:06:40,227 INFO L78 Accepts]: Start accepts. Automaton has 27475 states and 49325 transitions. Word has length 90 [2021-11-07 02:06:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:40,227 INFO L470 AbstractCegarLoop]: Abstraction has 27475 states and 49325 transitions. [2021-11-07 02:06:40,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.61111111111111) internal successors, (155), 17 states have internal predecessors, (155), 0 states have call successors, (0), 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 02:06:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 27475 states and 49325 transitions. [2021-11-07 02:06:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 02:06:40,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:40,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:40,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:40,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:40,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:40,646 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1858961343, now seen corresponding path program 1 times [2021-11-07 02:06:40,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:40,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473011197] [2021-11-07 02:06:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:40,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:40,648 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:40,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 02:06:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:41,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:42,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:42,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:42,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473011197] [2021-11-07 02:06:42,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473011197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:42,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110231339] [2021-11-07 02:06:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:42,390 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:42,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:42,392 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:42,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 02:06:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:06:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:44,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:44,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110231339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:44,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:44,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 02:06:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230291663] [2021-11-07 02:06:44,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:06:44,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:06:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:06:44,702 INFO L87 Difference]: Start difference. First operand 27475 states and 49325 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:46,479 INFO L93 Difference]: Finished difference Result 30498 states and 54327 transitions. [2021-11-07 02:06:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:06:46,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 02:06:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:46,519 INFO L225 Difference]: With dead ends: 30498 [2021-11-07 02:06:46,520 INFO L226 Difference]: Without dead ends: 27888 [2021-11-07 02:06:46,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:06:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27888 states. [2021-11-07 02:06:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27888 to 27121. [2021-11-07 02:06:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27121 states, 27115 states have (on average 1.8004794394246726) internal successors, (48820), 27120 states have internal predecessors, (48820), 0 states have call successors, (0), 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 02:06:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27121 states to 27121 states and 48820 transitions. [2021-11-07 02:06:48,294 INFO L78 Accepts]: Start accepts. Automaton has 27121 states and 48820 transitions. Word has length 90 [2021-11-07 02:06:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:48,294 INFO L470 AbstractCegarLoop]: Abstraction has 27121 states and 48820 transitions. [2021-11-07 02:06:48,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 27121 states and 48820 transitions. [2021-11-07 02:06:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:06:48,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:48,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:48,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:48,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:48,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:48,719 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:48,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1207522741, now seen corresponding path program 1 times [2021-11-07 02:06:48,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:48,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409242195] [2021-11-07 02:06:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:48,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:48,721 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:48,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 02:06:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:50,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:50,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:50,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:50,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409242195] [2021-11-07 02:06:50,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409242195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:50,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028844904] [2021-11-07 02:06:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:50,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:50,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:50,598 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:50,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 02:06:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 02:06:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:52,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:06:53,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028844904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:53,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:06:53,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-07 02:06:53,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596076775] [2021-11-07 02:06:53,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:06:53,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:06:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:06:53,080 INFO L87 Difference]: Start difference. First operand 27121 states and 48820 transitions. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:55,613 INFO L93 Difference]: Finished difference Result 30750 states and 54738 transitions. [2021-11-07 02:06:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:06:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:06:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:55,657 INFO L225 Difference]: With dead ends: 30750 [2021-11-07 02:06:55,657 INFO L226 Difference]: Without dead ends: 28615 [2021-11-07 02:06:55,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:06:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28615 states. [2021-11-07 02:06:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28615 to 27086. [2021-11-07 02:06:57,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27086 states, 27080 states have (on average 1.8000738552437223) internal successors, (48746), 27085 states have internal predecessors, (48746), 0 states have call successors, (0), 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 02:06:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27086 states to 27086 states and 48746 transitions. [2021-11-07 02:06:57,507 INFO L78 Accepts]: Start accepts. Automaton has 27086 states and 48746 transitions. Word has length 91 [2021-11-07 02:06:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:57,508 INFO L470 AbstractCegarLoop]: Abstraction has 27086 states and 48746 transitions. [2021-11-07 02:06:57,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 27086 states and 48746 transitions. [2021-11-07 02:06:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:06:57,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:57,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:57,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:57,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-07 02:06:57,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:57,952 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:57,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1203696047, now seen corresponding path program 1 times [2021-11-07 02:06:57,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:57,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130170586] [2021-11-07 02:06:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:57,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:57,954 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:57,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 02:06:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:59,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:59,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:59,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:59,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130170586] [2021-11-07 02:06:59,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130170586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:06:59,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [119669701] [2021-11-07 02:06:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:59,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:59,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:06:59,862 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:06:59,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 02:07:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:01,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:07:01,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:07:02,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:07:02,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [119669701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:02,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:02,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 02:07:02,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772385770] [2021-11-07 02:07:02,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:07:02,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:07:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:07:02,970 INFO L87 Difference]: Start difference. First operand 27086 states and 48746 transitions. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 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 02:07:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:31,116 INFO L93 Difference]: Finished difference Result 81098 states and 142896 transitions. [2021-11-07 02:07:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 02:07:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:07:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:31,229 INFO L225 Difference]: With dead ends: 81098 [2021-11-07 02:07:31,229 INFO L226 Difference]: Without dead ends: 79189 [2021-11-07 02:07:31,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=743, Invalid=2563, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 02:07:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79189 states. [2021-11-07 02:07:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79189 to 54440. [2021-11-07 02:07:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54440 states, 54434 states have (on average 1.7982143513245399) internal successors, (97884), 54439 states have internal predecessors, (97884), 0 states have call successors, (0), 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 02:07:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54440 states to 54440 states and 97884 transitions. [2021-11-07 02:07:35,634 INFO L78 Accepts]: Start accepts. Automaton has 54440 states and 97884 transitions. Word has length 91 [2021-11-07 02:07:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:35,634 INFO L470 AbstractCegarLoop]: Abstraction has 54440 states and 97884 transitions. [2021-11-07 02:07:35,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 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 02:07:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 54440 states and 97884 transitions. [2021-11-07 02:07:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:07:35,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:35,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:35,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:35,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:36,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:36,071 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2080153999, now seen corresponding path program 1 times [2021-11-07 02:07:36,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:36,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82485120] [2021-11-07 02:07:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:36,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:36,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:36,074 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:36,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 02:07:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:37,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:37,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:38,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:38,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82485120] [2021-11-07 02:07:38,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82485120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:38,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497809360] [2021-11-07 02:07:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:38,091 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:38,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:38,091 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:38,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-07 02:07:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:07:40,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:07:40,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1497809360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:40,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:40,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 02:07:40,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530441559] [2021-11-07 02:07:40,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:07:40,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:07:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:07:40,761 INFO L87 Difference]: Start difference. First operand 54440 states and 97884 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:48,446 INFO L93 Difference]: Finished difference Result 77065 states and 134180 transitions. [2021-11-07 02:07:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:07:48,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 02:07:48,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:48,552 INFO L225 Difference]: With dead ends: 77065 [2021-11-07 02:07:48,552 INFO L226 Difference]: Without dead ends: 72651 [2021-11-07 02:07:48,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:07:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72651 states. [2021-11-07 02:07:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72651 to 59027. [2021-11-07 02:07:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59027 states, 59021 states have (on average 1.7831110960505583) internal successors, (105241), 59026 states have internal predecessors, (105241), 0 states have call successors, (0), 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 02:07:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59027 states to 59027 states and 105241 transitions. [2021-11-07 02:07:53,947 INFO L78 Accepts]: Start accepts. Automaton has 59027 states and 105241 transitions. Word has length 91 [2021-11-07 02:07:53,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:53,947 INFO L470 AbstractCegarLoop]: Abstraction has 59027 states and 105241 transitions. [2021-11-07 02:07:53,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 59027 states and 105241 transitions. [2021-11-07 02:07:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:07:53,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:53,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:54,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:54,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:54,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:54,384 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2041130274, now seen corresponding path program 1 times [2021-11-07 02:07:54,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:54,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629347119] [2021-11-07 02:07:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:54,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:54,387 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:54,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 02:07:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:56,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:56,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:56,774 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:56,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629347119] [2021-11-07 02:07:56,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629347119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:56,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653654629] [2021-11-07 02:07:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:56,774 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:56,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:56,775 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:56,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1797ad8f-2be7-451b-9708-e32cecf83287/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 02:07:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:59,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 02:07:59,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:07:59,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:07:59,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653654629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:59,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:07:59,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-07 02:07:59,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774002886] [2021-11-07 02:07:59,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:07:59,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:07:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:07:59,781 INFO L87 Difference]: Start difference. First operand 59027 states and 105241 transitions. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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)