./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:16:14,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:16:14,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:16:14,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:16:14,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:16:14,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:16:14,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:16:14,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:16:14,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:16:14,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:16:14,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:16:14,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:16:14,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:16:14,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:16:14,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:16:14,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:16:14,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:16:14,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:16:14,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:16:14,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:16:14,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:16:14,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:16:14,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:16:14,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:16:14,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:16:14,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:16:14,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:16:14,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:16:14,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:16:14,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:16:14,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:16:14,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:16:14,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:16:14,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:16:14,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:16:14,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:16:14,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:16:14,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:16:14,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:16:14,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:16:14,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:16:14,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:16:14,303 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:16:14,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:16:14,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:16:14,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:16:14,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:16:14,305 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:16:14,305 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:16:14,306 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:16:14,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:16:14,306 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:16:14,306 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:16:14,306 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:16:14,307 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:16:14,307 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:16:14,307 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:16:14,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:16:14,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:16:14,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:16:14,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:16:14,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:16:14,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:16:14,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:16:14,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:16:14,310 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:16:14,310 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:16:14,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:16:14,311 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:16:14,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:16:14,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:16:14,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:16:14,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:16:14,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:16:14,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:16:14,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:16:14,313 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:16:14,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:16:14,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:16:14,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:16:14,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:16:14,314 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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d [2021-11-07 01:16:14,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:16:14,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:16:14,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:16:14,637 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:16:14,638 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:16:14,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-07 01:16:14,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/f8e9164b5/cce23aac74734aaaa24b3a4e0a808bdf/FLAGcaddc872a [2021-11-07 01:16:15,559 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:16:15,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-07 01:16:15,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/f8e9164b5/cce23aac74734aaaa24b3a4e0a808bdf/FLAGcaddc872a [2021-11-07 01:16:15,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/f8e9164b5/cce23aac74734aaaa24b3a4e0a808bdf [2021-11-07 01:16:15,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:16:15,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:16:15,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:16:15,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:16:15,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:16:15,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:15" (1/1) ... [2021-11-07 01:16:15,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505cd302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:15, skipping insertion in model container [2021-11-07 01:16:15,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:15" (1/1) ... [2021-11-07 01:16:15,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:16:15,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:16:16,564 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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-07 01:16:16,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:16:16,702 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:16:16,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a221195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:16, skipping insertion in model container [2021-11-07 01:16:16,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:16:16,703 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:16:16,706 INFO L168 Benchmark]: Toolchain (without parser) took 989.66 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 75.4 MB in the beginning and 103.9 MB in the end (delta: -28.5 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:16:16,707 INFO L168 Benchmark]: CDTParser took 1.08 ms. Allocated memory is still 107.0 MB. Free memory is still 82.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:16:16,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 986.46 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 75.2 MB in the beginning and 103.9 MB in the end (delta: -28.7 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:16:16,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.08 ms. Allocated memory is still 107.0 MB. Free memory is still 82.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 986.46 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 75.2 MB in the beginning and 103.9 MB in the end (delta: -28.7 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3094]: 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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:16:19,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:16:19,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:16:19,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:16:19,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:16:19,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:16:19,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:16:19,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:16:19,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:16:19,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:16:19,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:16:19,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:16:19,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:16:19,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:16:19,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:16:19,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:16:19,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:16:19,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:16:19,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:16:19,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:16:19,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:16:19,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:16:19,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:16:19,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:16:19,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:16:19,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:16:19,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:16:19,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:16:19,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:16:19,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:16:19,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:16:19,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:16:19,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:16:19,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:16:19,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:16:19,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:16:19,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:16:19,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:16:19,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:16:19,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:16:19,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:16:19,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:16:19,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:16:19,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:16:19,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:16:19,608 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:16:19,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:16:19,609 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:16:19,609 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:16:19,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:16:19,609 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:16:19,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:16:19,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:16:19,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:16:19,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:16:19,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:16:19,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:16:19,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:16:19,615 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:16:19,615 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:16:19,615 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:16:19,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:16:19,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:16:19,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:16:19,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:16:19,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:16:19,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:16:19,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:16:19,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:16:19,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:16:19,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:16:19,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:16:19,619 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:16:19,619 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:19,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:16:19,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:16:19,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:16:19,620 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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 329a2716e4212f7d84877599b73bf84d73c2c4b19cd8d5bf0b2cb6bd49bef38d [2021-11-07 01:16:20,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:16:20,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:16:20,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:16:20,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:16:20,186 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:16:20,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-07 01:16:20,284 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/b804c8157/d3ed6e8538a84086bd5c9a0d84f12040/FLAGbf0fe9cd3 [2021-11-07 01:16:21,229 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:16:21,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c [2021-11-07 01:16:21,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/b804c8157/d3ed6e8538a84086bd5c9a0d84f12040/FLAGbf0fe9cd3 [2021-11-07 01:16:21,320 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/data/b804c8157/d3ed6e8538a84086bd5c9a0d84f12040 [2021-11-07 01:16:21,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:16:21,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:16:21,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:16:21,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:16:21,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:16:21,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:21" (1/1) ... [2021-11-07 01:16:21,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4925dd14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:21, skipping insertion in model container [2021-11-07 01:16:21,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:21" (1/1) ... [2021-11-07 01:16:21,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:16:21,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:16:22,107 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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-07 01:16:22,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:16:22,206 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:16:22,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:16:22,377 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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-07 01:16:22,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:16:22,410 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:16:22,539 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_eef93d86-dca6-4c64-8a63-57dd19f8c11f/sv-benchmarks/c/product-lines/elevator_spec1_product19.cil.c[61467,61480] [2021-11-07 01:16:22,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:16:22,597 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:16:22,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22 WrapperNode [2021-11-07 01:16:22,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:16:22,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:16:22,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:16:22,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:16:22,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:22,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:22,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:16:22,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:16:22,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:16:22,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:16:22,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:22,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:22,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:22,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:23,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:23,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:23,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:23,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:16:23,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:16:23,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:16:23,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:16:23,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (1/1) ... [2021-11-07 01:16:23,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:16:23,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:16:23,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:16:23,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:16:23,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:16:23,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:16:23,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:16:23,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:16:32,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:16:32,240 INFO L299 CfgBuilder]: Removed 601 assume(true) statements. [2021-11-07 01:16:32,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:32 BoogieIcfgContainer [2021-11-07 01:16:32,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:16:32,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:16:32,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:16:32,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:16:32,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:16:21" (1/3) ... [2021-11-07 01:16:32,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7819612a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:32, skipping insertion in model container [2021-11-07 01:16:32,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:22" (2/3) ... [2021-11-07 01:16:32,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7819612a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:32, skipping insertion in model container [2021-11-07 01:16:32,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:32" (3/3) ... [2021-11-07 01:16:32,256 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product19.cil.c [2021-11-07 01:16:32,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:16:32,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:16:32,366 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:16:32,374 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:16:32,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:16:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 2495 states, 2489 states have (on average 1.885897950984331) internal successors, (4694), 2494 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:16:32,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:32,482 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:32,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1084388217, now seen corresponding path program 1 times [2021-11-07 01:16:32,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:32,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404542009] [2021-11-07 01:16:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:32,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:32,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:32,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:16:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:32,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:16:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:33,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:33,199 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 01:16:33,200 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:33,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404542009] [2021-11-07 01:16:33,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404542009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:33,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:33,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:16:33,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110465495] [2021-11-07 01:16:33,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:16:33,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:16:33,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:16:33,238 INFO L87 Difference]: Start difference. First operand has 2495 states, 2489 states have (on average 1.885897950984331) internal successors, (4694), 2494 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:33,357 INFO L93 Difference]: Finished difference Result 2514 states and 4717 transitions. [2021-11-07 01:16:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:16:33,359 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:16:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:33,388 INFO L225 Difference]: With dead ends: 2514 [2021-11-07 01:16:33,388 INFO L226 Difference]: Without dead ends: 2491 [2021-11-07 01:16:33,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:16:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-11-07 01:16:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 2491. [2021-11-07 01:16:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2486 states have (on average 1.8833467417538214) internal successors, (4682), 2490 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 4682 transitions. [2021-11-07 01:16:33,572 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 4682 transitions. Word has length 53 [2021-11-07 01:16:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:33,573 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 4682 transitions. [2021-11-07 01:16:33,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 4682 transitions. [2021-11-07 01:16:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:16:33,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:33,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:33,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:33,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:33,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1519338636, now seen corresponding path program 1 times [2021-11-07 01:16:33,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:33,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393557902] [2021-11-07 01:16:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:33,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:33,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:33,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:33,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:16:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:34,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:16:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:34,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:34,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:34,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393557902] [2021-11-07 01:16:34,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393557902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:34,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:34,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:34,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074254166] [2021-11-07 01:16:34,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:34,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:34,539 INFO L87 Difference]: Start difference. First operand 2491 states and 4682 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:34,848 INFO L93 Difference]: Finished difference Result 7393 states and 13903 transitions. [2021-11-07 01:16:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:16:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:34,880 INFO L225 Difference]: With dead ends: 7393 [2021-11-07 01:16:34,880 INFO L226 Difference]: Without dead ends: 4915 [2021-11-07 01:16:34,888 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 01:16:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-11-07 01:16:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 2491. [2021-11-07 01:16:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2486 states have (on average 1.8805309734513274) internal successors, (4675), 2490 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 4675 transitions. [2021-11-07 01:16:35,077 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 4675 transitions. Word has length 55 [2021-11-07 01:16:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:35,078 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 4675 transitions. [2021-11-07 01:16:35,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 4675 transitions. [2021-11-07 01:16:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:16:35,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:35,083 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:35,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:16:35,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:35,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash -172049623, now seen corresponding path program 1 times [2021-11-07 01:16:35,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:35,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044626888] [2021-11-07 01:16:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:35,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:35,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:35,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:16:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:35,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:35,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:35,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:36,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:36,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044626888] [2021-11-07 01:16:36,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044626888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:36,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:36,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:16:36,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130837196] [2021-11-07 01:16:36,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:16:36,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:16:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:16:36,077 INFO L87 Difference]: Start difference. First operand 2491 states and 4675 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:37,086 INFO L93 Difference]: Finished difference Result 16912 states and 31777 transitions. [2021-11-07 01:16:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:16:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:16:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:37,199 INFO L225 Difference]: With dead ends: 16912 [2021-11-07 01:16:37,199 INFO L226 Difference]: Without dead ends: 14443 [2021-11-07 01:16:37,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:16:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14443 states. [2021-11-07 01:16:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14443 to 2469. [2021-11-07 01:16:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2464 states have (on average 1.8766233766233766) internal successors, (4624), 2468 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 4624 transitions. [2021-11-07 01:16:37,530 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 4624 transitions. Word has length 61 [2021-11-07 01:16:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:37,530 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 4624 transitions. [2021-11-07 01:16:37,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 4624 transitions. [2021-11-07 01:16:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:16:37,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:37,534 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:37,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:37,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:37,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2084863414, now seen corresponding path program 1 times [2021-11-07 01:16:37,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:37,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857180352] [2021-11-07 01:16:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:37,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:37,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:37,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:16:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:16:38,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:38,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:38,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:38,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857180352] [2021-11-07 01:16:38,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857180352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:38,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:38,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:38,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026202612] [2021-11-07 01:16:38,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:38,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:38,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:38,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:38,675 INFO L87 Difference]: Start difference. First operand 2469 states and 4624 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:39,256 INFO L93 Difference]: Finished difference Result 7304 states and 13707 transitions. [2021-11-07 01:16:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:16:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:39,280 INFO L225 Difference]: With dead ends: 7304 [2021-11-07 01:16:39,280 INFO L226 Difference]: Without dead ends: 4857 [2021-11-07 01:16:39,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2021-11-07 01:16:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 2469. [2021-11-07 01:16:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2464 states have (on average 1.8721590909090908) internal successors, (4613), 2468 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 4613 transitions. [2021-11-07 01:16:39,502 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 4613 transitions. Word has length 63 [2021-11-07 01:16:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:39,502 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 4613 transitions. [2021-11-07 01:16:39,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 4613 transitions. [2021-11-07 01:16:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:16:39,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:39,507 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:39,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:39,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:39,721 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:39,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1206943, now seen corresponding path program 1 times [2021-11-07 01:16:39,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:39,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670771157] [2021-11-07 01:16:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:39,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:39,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:39,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:16:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:16:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:40,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:40,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:40,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670771157] [2021-11-07 01:16:40,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670771157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:40,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:40,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:16:40,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291899017] [2021-11-07 01:16:40,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:16:40,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:16:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:16:40,905 INFO L87 Difference]: Start difference. First operand 2469 states and 4613 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:43,959 INFO L93 Difference]: Finished difference Result 26403 states and 49577 transitions. [2021-11-07 01:16:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:16:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:16:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:44,072 INFO L225 Difference]: With dead ends: 26403 [2021-11-07 01:16:44,072 INFO L226 Difference]: Without dead ends: 23959 [2021-11-07 01:16:44,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:16:44,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23959 states. [2021-11-07 01:16:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23959 to 2471. [2021-11-07 01:16:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2466 states have (on average 1.8694241686942417) internal successors, (4610), 2470 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 4610 transitions. [2021-11-07 01:16:44,480 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 4610 transitions. Word has length 69 [2021-11-07 01:16:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:44,481 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 4610 transitions. [2021-11-07 01:16:44,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 4610 transitions. [2021-11-07 01:16:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:16:44,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:44,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:44,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:44,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:44,704 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1235040270, now seen corresponding path program 1 times [2021-11-07 01:16:44,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:44,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016860030] [2021-11-07 01:16:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:44,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:44,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:44,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:16:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:16:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:45,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:45,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:45,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016860030] [2021-11-07 01:16:45,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016860030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:45,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:45,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:16:45,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603038724] [2021-11-07 01:16:45,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:16:45,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:16:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:16:45,875 INFO L87 Difference]: Start difference. First operand 2471 states and 4610 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:48,193 INFO L93 Difference]: Finished difference Result 26371 states and 49498 transitions. [2021-11-07 01:16:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:16:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:16:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:48,262 INFO L225 Difference]: With dead ends: 26371 [2021-11-07 01:16:48,263 INFO L226 Difference]: Without dead ends: 23927 [2021-11-07 01:16:48,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:16:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23927 states. [2021-11-07 01:16:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23927 to 2475. [2021-11-07 01:16:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2470 states have (on average 1.8676113360323887) internal successors, (4613), 2474 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 4613 transitions. [2021-11-07 01:16:48,537 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 4613 transitions. Word has length 71 [2021-11-07 01:16:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:48,538 INFO L470 AbstractCegarLoop]: Abstraction has 2475 states and 4613 transitions. [2021-11-07 01:16:48,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 4613 transitions. [2021-11-07 01:16:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:16:48,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:48,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:48,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:16:48,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:48,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash 105701151, now seen corresponding path program 1 times [2021-11-07 01:16:48,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:48,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656241540] [2021-11-07 01:16:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:48,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:48,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:48,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:48,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:16:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:49,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:16:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:49,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:49,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:49,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656241540] [2021-11-07 01:16:49,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656241540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:49,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:49,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:49,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376187153] [2021-11-07 01:16:49,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:49,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:49,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:49,657 INFO L87 Difference]: Start difference. First operand 2475 states and 4613 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:49,931 INFO L93 Difference]: Finished difference Result 4898 states and 9157 transitions. [2021-11-07 01:16:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:49,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:16:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:49,938 INFO L225 Difference]: With dead ends: 4898 [2021-11-07 01:16:49,939 INFO L226 Difference]: Without dead ends: 2454 [2021-11-07 01:16:49,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2021-11-07 01:16:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2454. [2021-11-07 01:16:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2449 states have (on average 1.8681094324213965) internal successors, (4575), 2453 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 4575 transitions. [2021-11-07 01:16:50,074 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 4575 transitions. Word has length 73 [2021-11-07 01:16:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:50,074 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 4575 transitions. [2021-11-07 01:16:50,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 4575 transitions. [2021-11-07 01:16:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:16:50,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:50,078 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:50,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:50,293 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -156362889, now seen corresponding path program 1 times [2021-11-07 01:16:50,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:50,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157483312] [2021-11-07 01:16:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:50,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:50,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:50,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:16:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:16:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:51,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:51,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:51,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157483312] [2021-11-07 01:16:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157483312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:51,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:51,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:16:51,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823358216] [2021-11-07 01:16:51,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:16:51,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:16:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:16:51,266 INFO L87 Difference]: Start difference. First operand 2454 states and 4575 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:51,442 INFO L93 Difference]: Finished difference Result 4842 states and 9060 transitions. [2021-11-07 01:16:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:16:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:51,448 INFO L225 Difference]: With dead ends: 4842 [2021-11-07 01:16:51,449 INFO L226 Difference]: Without dead ends: 2429 [2021-11-07 01:16:51,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:16:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-11-07 01:16:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2429. [2021-11-07 01:16:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2424 states have (on average 1.8692244224422443) internal successors, (4531), 2428 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 4531 transitions. [2021-11-07 01:16:51,630 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 4531 transitions. Word has length 74 [2021-11-07 01:16:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:51,631 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 4531 transitions. [2021-11-07 01:16:51,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 4531 transitions. [2021-11-07 01:16:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:16:51,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:51,634 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:51,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:51,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:51,856 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash -418647218, now seen corresponding path program 1 times [2021-11-07 01:16:51,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:51,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565538677] [2021-11-07 01:16:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:51,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:51,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:51,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:51,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:16:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:52,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:16:52,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:52,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:53,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:53,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565538677] [2021-11-07 01:16:53,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565538677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:53,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:53,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:16:53,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9720927] [2021-11-07 01:16:53,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:16:53,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:16:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:53,098 INFO L87 Difference]: Start difference. First operand 2429 states and 4531 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:53,396 INFO L93 Difference]: Finished difference Result 4817 states and 9016 transitions. [2021-11-07 01:16:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:16:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:16:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:53,404 INFO L225 Difference]: With dead ends: 4817 [2021-11-07 01:16:53,404 INFO L226 Difference]: Without dead ends: 2426 [2021-11-07 01:16:53,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:16:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-11-07 01:16:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2426. [2021-11-07 01:16:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2421 states have (on average 1.8682362660057827) internal successors, (4523), 2425 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 4523 transitions. [2021-11-07 01:16:53,552 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 4523 transitions. Word has length 75 [2021-11-07 01:16:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:53,552 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 4523 transitions. [2021-11-07 01:16:53,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 4523 transitions. [2021-11-07 01:16:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:16:53,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:53,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:53,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:53,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:53,772 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1734159741, now seen corresponding path program 1 times [2021-11-07 01:16:53,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:53,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961953313] [2021-11-07 01:16:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:53,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:53,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:53,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:53,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:16:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:16:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:54,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:54,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:54,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961953313] [2021-11-07 01:16:54,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961953313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:54,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:54,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:16:54,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203942249] [2021-11-07 01:16:54,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:16:54,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:54,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:16:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:16:54,935 INFO L87 Difference]: Start difference. First operand 2426 states and 4523 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:55,157 INFO L93 Difference]: Finished difference Result 4808 states and 8998 transitions. [2021-11-07 01:16:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:16:55,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:16:55,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:55,166 INFO L225 Difference]: With dead ends: 4808 [2021-11-07 01:16:55,166 INFO L226 Difference]: Without dead ends: 2424 [2021-11-07 01:16:55,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:16:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-11-07 01:16:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2424. [2021-11-07 01:16:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2419 states have (on average 1.8673005374121538) internal successors, (4517), 2423 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 4517 transitions. [2021-11-07 01:16:55,315 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 4517 transitions. Word has length 76 [2021-11-07 01:16:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:55,316 INFO L470 AbstractCegarLoop]: Abstraction has 2424 states and 4517 transitions. [2021-11-07 01:16:55,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:55,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 4517 transitions. [2021-11-07 01:16:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:16:55,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:55,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:55,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:55,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:55,543 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1619891255, now seen corresponding path program 1 times [2021-11-07 01:16:55,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:55,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353886360] [2021-11-07 01:16:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:55,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:55,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:55,547 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:55,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:16:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:16:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:56,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:56,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:56,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353886360] [2021-11-07 01:16:56,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353886360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:56,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:56,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:16:56,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677223287] [2021-11-07 01:16:56,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:16:56,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:56,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:16:56,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:16:56,655 INFO L87 Difference]: Start difference. First operand 2424 states and 4517 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:56,879 INFO L93 Difference]: Finished difference Result 4801 states and 8983 transitions. [2021-11-07 01:16:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:16:56,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:16:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:56,883 INFO L225 Difference]: With dead ends: 4801 [2021-11-07 01:16:56,883 INFO L226 Difference]: Without dead ends: 2422 [2021-11-07 01:16:56,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:16:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-11-07 01:16:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2422. [2021-11-07 01:16:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2417 states have (on average 1.866363260239967) internal successors, (4511), 2421 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 4511 transitions. [2021-11-07 01:16:57,029 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 4511 transitions. Word has length 77 [2021-11-07 01:16:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:57,030 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 4511 transitions. [2021-11-07 01:16:57,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:16:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 4511 transitions. [2021-11-07 01:16:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:16:57,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:57,033 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:57,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:16:57,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:16:57,240 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:16:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash 390140520, now seen corresponding path program 1 times [2021-11-07 01:16:57,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:57,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305183875] [2021-11-07 01:16:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:57,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:57,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:57,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:16:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:57,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:58,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:16:58,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:58,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305183875] [2021-11-07 01:16:58,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305183875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:58,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:16:58,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:16:58,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181786070] [2021-11-07 01:16:58,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:16:58,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:16:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:16:58,418 INFO L87 Difference]: Start difference. First operand 2422 states and 4511 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:00,076 INFO L93 Difference]: Finished difference Result 8784 states and 16463 transitions. [2021-11-07 01:17:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:17:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:17:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:00,085 INFO L225 Difference]: With dead ends: 8784 [2021-11-07 01:17:00,085 INFO L226 Difference]: Without dead ends: 6413 [2021-11-07 01:17:00,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:17:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6413 states. [2021-11-07 01:17:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6413 to 2422. [2021-11-07 01:17:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2417 states have (on average 1.8241621845262723) internal successors, (4409), 2421 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 4409 transitions. [2021-11-07 01:17:00,276 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 4409 transitions. Word has length 78 [2021-11-07 01:17:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:00,276 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 4409 transitions. [2021-11-07 01:17:00,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 4409 transitions. [2021-11-07 01:17:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:17:00,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:00,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:00,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:00,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:00,479 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash 681936084, now seen corresponding path program 1 times [2021-11-07 01:17:00,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:00,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989799712] [2021-11-07 01:17:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:00,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:00,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:00,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:17:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:01,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:01,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:01,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989799712] [2021-11-07 01:17:01,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989799712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:01,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:01,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:17:01,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060891024] [2021-11-07 01:17:01,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:01,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:01,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:01,712 INFO L87 Difference]: Start difference. First operand 2422 states and 4409 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:02,755 INFO L93 Difference]: Finished difference Result 6745 states and 12434 transitions. [2021-11-07 01:17:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:17:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:17:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:02,761 INFO L225 Difference]: With dead ends: 6745 [2021-11-07 01:17:02,761 INFO L226 Difference]: Without dead ends: 4392 [2021-11-07 01:17:02,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:17:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2021-11-07 01:17:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 2388. [2021-11-07 01:17:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2383 states have (on average 1.8241712127570289) internal successors, (4347), 2387 states have internal predecessors, (4347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 4347 transitions. [2021-11-07 01:17:02,960 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 4347 transitions. Word has length 86 [2021-11-07 01:17:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:02,961 INFO L470 AbstractCegarLoop]: Abstraction has 2388 states and 4347 transitions. [2021-11-07 01:17:02,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 4347 transitions. [2021-11-07 01:17:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:17:02,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:02,971 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:02,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:03,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:03,186 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:03,186 INFO L85 PathProgramCache]: Analyzing trace with hash -694497868, now seen corresponding path program 1 times [2021-11-07 01:17:03,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:03,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497840100] [2021-11-07 01:17:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:03,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:03,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:03,188 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:03,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:17:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:17:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:04,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:04,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:04,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497840100] [2021-11-07 01:17:04,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497840100] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:04,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:04,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:17:04,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198051873] [2021-11-07 01:17:04,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:17:04,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:17:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:17:04,384 INFO L87 Difference]: Start difference. First operand 2388 states and 4347 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:05,954 INFO L93 Difference]: Finished difference Result 9398 states and 17281 transitions. [2021-11-07 01:17:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:17:05,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-11-07 01:17:05,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:05,964 INFO L225 Difference]: With dead ends: 9398 [2021-11-07 01:17:05,964 INFO L226 Difference]: Without dead ends: 7078 [2021-11-07 01:17:05,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:17:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7078 states. [2021-11-07 01:17:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7078 to 2392. [2021-11-07 01:17:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2387 states have (on average 1.8227901131126938) internal successors, (4351), 2391 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 4351 transitions. [2021-11-07 01:17:06,183 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 4351 transitions. Word has length 88 [2021-11-07 01:17:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:06,183 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 4351 transitions. [2021-11-07 01:17:06,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 4351 transitions. [2021-11-07 01:17:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:17:06,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:06,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:06,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:06,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:06,404 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:06,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2143426133, now seen corresponding path program 1 times [2021-11-07 01:17:06,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:06,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632331724] [2021-11-07 01:17:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:06,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:06,406 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:06,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:17:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:17:07,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:07,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:07,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:07,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632331724] [2021-11-07 01:17:07,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632331724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:07,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:07,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:17:07,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367031999] [2021-11-07 01:17:07,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:17:07,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:07,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:17:07,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:17:07,756 INFO L87 Difference]: Start difference. First operand 2392 states and 4351 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:09,206 INFO L93 Difference]: Finished difference Result 6638 states and 12166 transitions. [2021-11-07 01:17:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:17:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 01:17:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:09,213 INFO L225 Difference]: With dead ends: 6638 [2021-11-07 01:17:09,213 INFO L226 Difference]: Without dead ends: 4301 [2021-11-07 01:17:09,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:17:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-11-07 01:17:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3280. [2021-11-07 01:17:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3275 states have (on average 1.8097709923664123) internal successors, (5927), 3279 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 5927 transitions. [2021-11-07 01:17:09,461 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 5927 transitions. Word has length 89 [2021-11-07 01:17:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:09,462 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 5927 transitions. [2021-11-07 01:17:09,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 5927 transitions. [2021-11-07 01:17:09,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:17:09,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:09,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:09,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:09,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:09,682 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash -820203489, now seen corresponding path program 1 times [2021-11-07 01:17:09,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:09,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184924827] [2021-11-07 01:17:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:09,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:09,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:09,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:09,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:17:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:17:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:11,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:11,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:11,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184924827] [2021-11-07 01:17:11,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184924827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:11,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:11,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:17:11,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657485026] [2021-11-07 01:17:11,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:17:11,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:11,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:17:11,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:17:11,564 INFO L87 Difference]: Start difference. First operand 3280 states and 5927 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:13,096 INFO L93 Difference]: Finished difference Result 23548 states and 42939 transitions. [2021-11-07 01:17:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:17:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:17:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:13,130 INFO L225 Difference]: With dead ends: 23548 [2021-11-07 01:17:13,130 INFO L226 Difference]: Without dead ends: 20332 [2021-11-07 01:17:13,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:17:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20332 states. [2021-11-07 01:17:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20332 to 6017. [2021-11-07 01:17:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6017 states, 6012 states have (on average 1.8231869594145043) internal successors, (10961), 6016 states have internal predecessors, (10961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 10961 transitions. [2021-11-07 01:17:13,759 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 10961 transitions. Word has length 91 [2021-11-07 01:17:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:13,760 INFO L470 AbstractCegarLoop]: Abstraction has 6017 states and 10961 transitions. [2021-11-07 01:17:13,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 10961 transitions. [2021-11-07 01:17:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:17:13,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:13,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:13,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:13,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:13,985 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -545443875, now seen corresponding path program 1 times [2021-11-07 01:17:13,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:13,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796736250] [2021-11-07 01:17:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:13,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:13,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:13,987 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:13,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:17:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:14,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:15,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:15,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:15,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796736250] [2021-11-07 01:17:15,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796736250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:15,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:15,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:17:15,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080965792] [2021-11-07 01:17:15,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:15,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:15,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:15,619 INFO L87 Difference]: Start difference. First operand 6017 states and 10961 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:16,553 INFO L93 Difference]: Finished difference Result 10870 states and 19736 transitions. [2021-11-07 01:17:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:17:16,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 01:17:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:16,563 INFO L225 Difference]: With dead ends: 10870 [2021-11-07 01:17:16,563 INFO L226 Difference]: Without dead ends: 8272 [2021-11-07 01:17:16,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:17:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8272 states. [2021-11-07 01:17:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8272 to 6007. [2021-11-07 01:17:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6007 states, 6002 states have (on average 1.8228923692102632) internal successors, (10941), 6006 states have internal predecessors, (10941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6007 states to 6007 states and 10941 transitions. [2021-11-07 01:17:16,982 INFO L78 Accepts]: Start accepts. Automaton has 6007 states and 10941 transitions. Word has length 91 [2021-11-07 01:17:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:16,983 INFO L470 AbstractCegarLoop]: Abstraction has 6007 states and 10941 transitions. [2021-11-07 01:17:16,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:16,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6007 states and 10941 transitions. [2021-11-07 01:17:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 01:17:16,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:16,985 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:16,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:17:17,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:17,186 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1559177891, now seen corresponding path program 1 times [2021-11-07 01:17:17,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:17,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573774470] [2021-11-07 01:17:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:17,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:17,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:17,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:17:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:17:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:18,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:18,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:18,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573774470] [2021-11-07 01:17:18,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573774470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:18,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:18,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:17:18,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31559280] [2021-11-07 01:17:18,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:17:18,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:17:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:17:18,618 INFO L87 Difference]: Start difference. First operand 6007 states and 10941 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:19,643 INFO L93 Difference]: Finished difference Result 18327 states and 33474 transitions. [2021-11-07 01:17:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:17:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 01:17:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:19,664 INFO L225 Difference]: With dead ends: 18327 [2021-11-07 01:17:19,664 INFO L226 Difference]: Without dead ends: 15735 [2021-11-07 01:17:19,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:17:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-11-07 01:17:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 8338. [2021-11-07 01:17:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8333 states have (on average 1.8175927037081483) internal successors, (15146), 8337 states have internal predecessors, (15146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 15146 transitions. [2021-11-07 01:17:20,252 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 15146 transitions. Word has length 93 [2021-11-07 01:17:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:20,253 INFO L470 AbstractCegarLoop]: Abstraction has 8338 states and 15146 transitions. [2021-11-07 01:17:20,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 15146 transitions. [2021-11-07 01:17:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 01:17:20,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:20,255 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:20,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:20,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:20,456 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:20,456 INFO L85 PathProgramCache]: Analyzing trace with hash -444667017, now seen corresponding path program 1 times [2021-11-07 01:17:20,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:20,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840144646] [2021-11-07 01:17:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:20,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:20,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:20,458 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:20,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:17:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:21,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:22,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:22,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840144646] [2021-11-07 01:17:22,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840144646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:22,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:22,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:17:22,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123383000] [2021-11-07 01:17:22,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:22,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:22,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:22,134 INFO L87 Difference]: Start difference. First operand 8338 states and 15146 transitions. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:26,072 INFO L93 Difference]: Finished difference Result 36787 states and 67269 transitions. [2021-11-07 01:17:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:17:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 01:17:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:26,124 INFO L225 Difference]: With dead ends: 36787 [2021-11-07 01:17:26,124 INFO L226 Difference]: Without dead ends: 31864 [2021-11-07 01:17:26,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:17:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31864 states. [2021-11-07 01:17:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31864 to 12132. [2021-11-07 01:17:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12132 states, 12127 states have (on average 1.8260905417663067) internal successors, (22145), 12131 states have internal predecessors, (22145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12132 states to 12132 states and 22145 transitions. [2021-11-07 01:17:27,129 INFO L78 Accepts]: Start accepts. Automaton has 12132 states and 22145 transitions. Word has length 95 [2021-11-07 01:17:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:27,130 INFO L470 AbstractCegarLoop]: Abstraction has 12132 states and 22145 transitions. [2021-11-07 01:17:27,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 12132 states and 22145 transitions. [2021-11-07 01:17:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:17:27,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:27,134 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:27,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:27,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:27,340 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash -347733592, now seen corresponding path program 1 times [2021-11-07 01:17:27,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:27,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425070170] [2021-11-07 01:17:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:27,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:27,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:27,343 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:27,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:17:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:28,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:17:28,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:28,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:28,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:28,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425070170] [2021-11-07 01:17:28,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425070170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:28,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:28,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:17:28,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104242319] [2021-11-07 01:17:28,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:28,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:28,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:28,950 INFO L87 Difference]: Start difference. First operand 12132 states and 22145 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:29,919 INFO L93 Difference]: Finished difference Result 20981 states and 38186 transitions. [2021-11-07 01:17:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:17:29,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-07 01:17:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:29,933 INFO L225 Difference]: With dead ends: 20981 [2021-11-07 01:17:29,933 INFO L226 Difference]: Without dead ends: 12147 [2021-11-07 01:17:29,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:17:29,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12147 states. [2021-11-07 01:17:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12147 to 12132. [2021-11-07 01:17:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12132 states, 12127 states have (on average 1.8170198730106375) internal successors, (22035), 12131 states have internal predecessors, (22035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12132 states to 12132 states and 22035 transitions. [2021-11-07 01:17:30,720 INFO L78 Accepts]: Start accepts. Automaton has 12132 states and 22035 transitions. Word has length 102 [2021-11-07 01:17:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:30,720 INFO L470 AbstractCegarLoop]: Abstraction has 12132 states and 22035 transitions. [2021-11-07 01:17:30,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 12132 states and 22035 transitions. [2021-11-07 01:17:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:17:30,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:30,725 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:30,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:30,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:30,940 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1486252676, now seen corresponding path program 1 times [2021-11-07 01:17:30,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:30,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564233389] [2021-11-07 01:17:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:30,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:30,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:30,944 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:30,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:17:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:32,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:32,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:32,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:32,808 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:32,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564233389] [2021-11-07 01:17:32,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564233389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:32,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:32,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:17:32,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807683717] [2021-11-07 01:17:32,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:17:32,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:17:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:17:32,810 INFO L87 Difference]: Start difference. First operand 12132 states and 22035 transitions. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:35,718 INFO L93 Difference]: Finished difference Result 31917 states and 57862 transitions. [2021-11-07 01:17:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:17:35,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 01:17:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:35,759 INFO L225 Difference]: With dead ends: 31917 [2021-11-07 01:17:35,759 INFO L226 Difference]: Without dead ends: 23421 [2021-11-07 01:17:35,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:17:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23421 states. [2021-11-07 01:17:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23421 to 10568. [2021-11-07 01:17:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10568 states, 10563 states have (on average 1.8065890372053395) internal successors, (19083), 10567 states have internal predecessors, (19083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10568 states to 10568 states and 19083 transitions. [2021-11-07 01:17:36,803 INFO L78 Accepts]: Start accepts. Automaton has 10568 states and 19083 transitions. Word has length 103 [2021-11-07 01:17:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:36,803 INFO L470 AbstractCegarLoop]: Abstraction has 10568 states and 19083 transitions. [2021-11-07 01:17:36,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10568 states and 19083 transitions. [2021-11-07 01:17:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:17:36,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:36,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:36,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:37,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:37,024 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1797597370, now seen corresponding path program 1 times [2021-11-07 01:17:37,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:37,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277756549] [2021-11-07 01:17:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:37,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:37,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:37,026 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:37,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:17:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:38,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:17:38,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:38,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:38,752 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 01:17:38,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:38,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277756549] [2021-11-07 01:17:38,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277756549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:38,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:38,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:17:38,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198736536] [2021-11-07 01:17:38,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:17:38,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:17:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:17:38,755 INFO L87 Difference]: Start difference. First operand 10568 states and 19083 transitions. Second operand has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:17:49,047 INFO L93 Difference]: Finished difference Result 66272 states and 118626 transitions. [2021-11-07 01:17:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:17:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 01:17:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:17:49,145 INFO L225 Difference]: With dead ends: 66272 [2021-11-07 01:17:49,145 INFO L226 Difference]: Without dead ends: 57311 [2021-11-07 01:17:49,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:17:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57311 states. [2021-11-07 01:17:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57311 to 23369. [2021-11-07 01:17:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23369 states, 23364 states have (on average 1.8018318781030644) internal successors, (42098), 23368 states have internal predecessors, (42098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23369 states to 23369 states and 42098 transitions. [2021-11-07 01:17:51,691 INFO L78 Accepts]: Start accepts. Automaton has 23369 states and 42098 transitions. Word has length 103 [2021-11-07 01:17:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:17:51,692 INFO L470 AbstractCegarLoop]: Abstraction has 23369 states and 42098 transitions. [2021-11-07 01:17:51,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.7) internal successors, (197), 9 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:17:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 23369 states and 42098 transitions. [2021-11-07 01:17:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:17:51,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:17:51,698 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:17:51,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:17:51,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:17:51,913 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:17:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:17:51,913 INFO L85 PathProgramCache]: Analyzing trace with hash -488835393, now seen corresponding path program 1 times [2021-11-07 01:17:51,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:17:51,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288897015] [2021-11-07 01:17:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:17:51,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:17:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:17:51,915 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:17:51,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:17:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:17:53,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:17:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:17:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:53,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:17:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:17:53,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:17:53,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288897015] [2021-11-07 01:17:53,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288897015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:17:53,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:17:53,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:17:53,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568172826] [2021-11-07 01:17:53,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:17:53,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:17:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:17:53,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:17:53,912 INFO L87 Difference]: Start difference. First operand 23369 states and 42098 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:05,369 INFO L93 Difference]: Finished difference Result 118611 states and 209234 transitions. [2021-11-07 01:18:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:18:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 01:18:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:05,690 INFO L225 Difference]: With dead ends: 118611 [2021-11-07 01:18:05,690 INFO L226 Difference]: Without dead ends: 98900 [2021-11-07 01:18:05,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:18:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98900 states. [2021-11-07 01:18:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98900 to 29118. [2021-11-07 01:18:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29118 states, 29113 states have (on average 1.7416961494864838) internal successors, (50706), 29117 states have internal predecessors, (50706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29118 states to 29118 states and 50706 transitions. [2021-11-07 01:18:10,010 INFO L78 Accepts]: Start accepts. Automaton has 29118 states and 50706 transitions. Word has length 104 [2021-11-07 01:18:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:10,011 INFO L470 AbstractCegarLoop]: Abstraction has 29118 states and 50706 transitions. [2021-11-07 01:18:10,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 29118 states and 50706 transitions. [2021-11-07 01:18:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:18:10,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:10,013 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:10,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:10,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:10,214 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:18:10,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash -65188671, now seen corresponding path program 1 times [2021-11-07 01:18:10,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:10,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055131440] [2021-11-07 01:18:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:10,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:10,216 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:10,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:18:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:11,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:18:11,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:11,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:12,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:12,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055131440] [2021-11-07 01:18:12,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055131440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:12,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:18:12,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:18:12,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677133102] [2021-11-07 01:18:12,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:18:12,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:12,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:18:12,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:18:12,368 INFO L87 Difference]: Start difference. First operand 29118 states and 50706 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:15,168 INFO L93 Difference]: Finished difference Result 50295 states and 88328 transitions. [2021-11-07 01:18:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:18:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 01:18:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:15,200 INFO L225 Difference]: With dead ends: 50295 [2021-11-07 01:18:15,201 INFO L226 Difference]: Without dead ends: 24836 [2021-11-07 01:18:15,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:18:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24836 states. [2021-11-07 01:18:18,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24836 to 24821. [2021-11-07 01:18:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24821 states, 24816 states have (on average 1.7813104448742747) internal successors, (44205), 24820 states have internal predecessors, (44205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24821 states to 24821 states and 44205 transitions. [2021-11-07 01:18:18,159 INFO L78 Accepts]: Start accepts. Automaton has 24821 states and 44205 transitions. Word has length 104 [2021-11-07 01:18:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 24821 states and 44205 transitions. [2021-11-07 01:18:18,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:18:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24821 states and 44205 transitions. [2021-11-07 01:18:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:18:18,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:18,162 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:18,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:18,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:18:18,363 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:18:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1900579645, now seen corresponding path program 1 times [2021-11-07 01:18:18,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:18,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885909216] [2021-11-07 01:18:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:18,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:18,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:18,365 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:18,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eef93d86-dca6-4c64-8a63-57dd19f8c11f/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:18:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:18:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:20,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:18:20,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:20,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885909216] [2021-11-07 01:18:20,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885909216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:18:20,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:18:20,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:18:20,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812820410] [2021-11-07 01:18:20,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:18:20,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:18:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:18:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:18:20,465 INFO L87 Difference]: Start difference. First operand 24821 states and 44205 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)