./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product33.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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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 6dc52251d8599495e3d1910510992bf3863620ce75312360a12a1bf3bdfb6242 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:10:11,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:10:11,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:10:11,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:10:11,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:10:11,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:10:11,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:10:11,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:10:11,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:10:11,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:10:11,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:10:11,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:10:11,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:10:11,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:10:11,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:10:11,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:10:11,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:10:11,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:10:11,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:10:11,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:10:11,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:10:11,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:10:11,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:10:11,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:10:11,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:10:11,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:10:11,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:10:11,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:10:11,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:10:11,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:10:11,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:10:11,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:10:11,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:10:11,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:10:11,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:10:11,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:10:11,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:10:11,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:10:11,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:10:11,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:10:11,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:10:11,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:10:11,857 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:10:11,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:10:11,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:10:11,861 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:10:11,861 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:10:11,862 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:10:11,862 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:10:11,862 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:10:11,862 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:10:11,863 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:10:11,864 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:10:11,864 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:10:11,865 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:10:11,865 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:10:11,865 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:10:11,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:10:11,867 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:10:11,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:10:11,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:10:11,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:10:11,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:10:11,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:10:11,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:10:11,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:10:11,869 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:10:11,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:10:11,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:10:11,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:10:11,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:10:11,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:10:11,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:11,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:10:11,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:10:11,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:10:11,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:10:11,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:10:11,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:10:11,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:10:11,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:10:11,875 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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dc52251d8599495e3d1910510992bf3863620ce75312360a12a1bf3bdfb6242 [2021-11-07 01:10:12,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:10:12,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:10:12,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:10:12,255 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:10:12,256 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:10:12,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product33.cil.c [2021-11-07 01:10:12,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/91e7369fc/4cb2b3ed82934545b190c335bbdcfd5d/FLAGdb96dfec8 [2021-11-07 01:10:13,237 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:10:13,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c [2021-11-07 01:10:13,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/91e7369fc/4cb2b3ed82934545b190c335bbdcfd5d/FLAGdb96dfec8 [2021-11-07 01:10:13,334 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/91e7369fc/4cb2b3ed82934545b190c335bbdcfd5d [2021-11-07 01:10:13,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:10:13,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:10:13,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:13,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:10:13,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:10:13,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:13" (1/1) ... [2021-11-07 01:10:13,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b63466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:13, skipping insertion in model container [2021-11-07 01:10:13,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:13" (1/1) ... [2021-11-07 01:10:13,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:10:13,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:14,193 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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c[33566,33579] [2021-11-07 01:10:14,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:14,414 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 01:10:14,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28ede4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:14, skipping insertion in model container [2021-11-07 01:10:14,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:14,416 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:10:14,419 INFO L168 Benchmark]: Toolchain (without parser) took 1073.33 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 63.7 MB in the beginning and 83.7 MB in the end (delta: -20.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:10:14,421 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 100.7 MB. Free memory is still 53.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:10:14,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1068.22 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 63.4 MB in the beginning and 83.7 MB in the end (delta: -20.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:10:14,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 100.7 MB. Free memory is still 53.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1068.22 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 63.4 MB in the beginning and 83.7 MB in the end (delta: -20.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1216]: 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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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 6dc52251d8599495e3d1910510992bf3863620ce75312360a12a1bf3bdfb6242 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:10:17,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:10:17,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:10:17,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:10:17,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:10:17,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:10:17,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:10:17,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:10:17,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:10:17,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:10:17,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:10:17,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:10:17,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:10:17,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:10:17,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:10:17,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:10:17,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:10:17,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:10:17,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:10:17,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:10:17,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:10:17,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:10:17,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:10:17,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:10:17,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:10:17,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:10:17,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:10:17,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:10:17,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:10:17,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:10:17,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:10:17,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:10:17,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:10:17,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:10:17,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:10:17,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:10:17,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:10:17,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:10:17,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:10:17,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:10:17,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:10:17,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:10:17,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:10:17,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:10:17,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:10:17,512 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:10:17,513 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:10:17,513 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:10:17,513 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:10:17,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:10:17,514 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:10:17,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:10:17,517 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:10:17,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:10:17,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:10:17,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:10:17,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:10:17,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:10:17,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:10:17,519 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:10:17,519 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:10:17,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:10:17,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:10:17,520 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:10:17,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:10:17,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:10:17,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:10:17,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:10:17,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:17,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:10:17,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:10:17,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:10:17,523 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:10:17,523 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:17,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:10:17,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:10:17,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:10:17,525 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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dc52251d8599495e3d1910510992bf3863620ce75312360a12a1bf3bdfb6242 [2021-11-07 01:10:18,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:10:18,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:10:18,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:10:18,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:10:18,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:10:18,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product33.cil.c [2021-11-07 01:10:18,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/921e16177/5f9fee24b6444fe08a764d6ceb124ed6/FLAGab2e5ce2e [2021-11-07 01:10:18,989 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:10:18,997 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c [2021-11-07 01:10:19,023 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/921e16177/5f9fee24b6444fe08a764d6ceb124ed6/FLAGab2e5ce2e [2021-11-07 01:10:19,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/data/921e16177/5f9fee24b6444fe08a764d6ceb124ed6 [2021-11-07 01:10:19,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:10:19,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:10:19,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:19,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:10:19,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:10:19,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:19" (1/1) ... [2021-11-07 01:10:19,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28fca64c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:19, skipping insertion in model container [2021-11-07 01:10:19,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:19" (1/1) ... [2021-11-07 01:10:19,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:10:19,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:19,864 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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c[33566,33579] [2021-11-07 01:10:20,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:20,079 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:10:20,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:20,206 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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c[33566,33579] [2021-11-07 01:10:20,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:20,314 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:10:20,416 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_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/sv-benchmarks/c/product-lines/email_spec9_product33.cil.c[33566,33579] [2021-11-07 01:10:20,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:20,564 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:10:20,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20 WrapperNode [2021-11-07 01:10:20,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:20,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:20,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:10:20,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:10:20,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:20,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:10:20,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:10:20,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:10:20,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:10:20,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:10:20,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:10:20,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:10:20,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (1/1) ... [2021-11-07 01:10:20,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:10:21,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:10:21,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:10:21,100 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:10:21,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:10:21,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:10:21,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:10:21,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:10:26,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:10:26,469 INFO L299 CfgBuilder]: Removed 407 assume(true) statements. [2021-11-07 01:10:26,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:26 BoogieIcfgContainer [2021-11-07 01:10:26,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:10:26,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:10:26,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:10:26,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:10:26,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:10:19" (1/3) ... [2021-11-07 01:10:26,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da37687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:26, skipping insertion in model container [2021-11-07 01:10:26,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:20" (2/3) ... [2021-11-07 01:10:26,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da37687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:26, skipping insertion in model container [2021-11-07 01:10:26,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:26" (3/3) ... [2021-11-07 01:10:26,486 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product33.cil.c [2021-11-07 01:10:26,493 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:10:26,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:10:26,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:10:26,592 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 01:10:26,593 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:10:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 595 states, 592 states have (on average 1.7314189189189189) internal successors, (1025), 594 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:10:26,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:26,662 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:26,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 577208093, now seen corresponding path program 1 times [2021-11-07 01:10:26,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:26,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875512752] [2021-11-07 01:10:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:26,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:26,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:26,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:26,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:10:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:27,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:10:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:27,489 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 01:10:27,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:27,623 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 01:10:27,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:27,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875512752] [2021-11-07 01:10:27,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875512752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:27,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:27,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:10:27,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937657974] [2021-11-07 01:10:27,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:10:27,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:27,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:10:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:10:27,656 INFO L87 Difference]: Start difference. First operand has 595 states, 592 states have (on average 1.7314189189189189) internal successors, (1025), 594 states have internal predecessors, (1025), 0 states have call successors, (0), 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 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:27,731 INFO L93 Difference]: Finished difference Result 944 states and 1602 transitions. [2021-11-07 01:10:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:10:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:10:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:27,754 INFO L225 Difference]: With dead ends: 944 [2021-11-07 01:10:27,754 INFO L226 Difference]: Without dead ends: 470 [2021-11-07 01:10:27,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 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 01:10:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-07 01:10:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2021-11-07 01:10:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 468 states have (on average 1.7393162393162394) internal successors, (814), 469 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 814 transitions. [2021-11-07 01:10:27,882 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 814 transitions. Word has length 45 [2021-11-07 01:10:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:27,883 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 814 transitions. [2021-11-07 01:10:27,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 814 transitions. [2021-11-07 01:10:27,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:10:27,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:27,891 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] [2021-11-07 01:10:27,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:28,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 621997072, now seen corresponding path program 1 times [2021-11-07 01:10:28,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:28,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271974813] [2021-11-07 01:10:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:28,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:28,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:28,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:28,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:10:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:28,856 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 01:10:28,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:29,019 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 01:10:29,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:29,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271974813] [2021-11-07 01:10:29,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271974813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:29,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:29,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:29,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558537379] [2021-11-07 01:10:29,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:29,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:29,025 INFO L87 Difference]: Start difference. First operand 470 states and 814 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:29,147 INFO L93 Difference]: Finished difference Result 1380 states and 2394 transitions. [2021-11-07 01:10:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:29,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 46 [2021-11-07 01:10:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:29,157 INFO L225 Difference]: With dead ends: 1380 [2021-11-07 01:10:29,158 INFO L226 Difference]: Without dead ends: 925 [2021-11-07 01:10:29,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 01:10:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-07 01:10:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 469. [2021-11-07 01:10:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 467 states have (on average 1.7323340471092077) internal successors, (809), 468 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 809 transitions. [2021-11-07 01:10:29,207 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 809 transitions. Word has length 46 [2021-11-07 01:10:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:29,207 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 809 transitions. [2021-11-07 01:10:29,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 809 transitions. [2021-11-07 01:10:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:10:29,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:29,210 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] [2021-11-07 01:10:29,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:29,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:29,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:29,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:29,429 INFO L85 PathProgramCache]: Analyzing trace with hash 328954474, now seen corresponding path program 1 times [2021-11-07 01:10:29,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:29,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363237575] [2021-11-07 01:10:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:29,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:29,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:29,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:29,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:10:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:30,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:30,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:30,375 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 01:10:30,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:30,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363237575] [2021-11-07 01:10:30,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363237575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:30,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:30,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:30,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476064424] [2021-11-07 01:10:30,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:30,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:30,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:30,378 INFO L87 Difference]: Start difference. First operand 469 states and 809 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:30,646 INFO L93 Difference]: Finished difference Result 1793 states and 3098 transitions. [2021-11-07 01:10:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:10:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:30,656 INFO L225 Difference]: With dead ends: 1793 [2021-11-07 01:10:30,656 INFO L226 Difference]: Without dead ends: 1342 [2021-11-07 01:10:30,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:10:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-07 01:10:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 468. [2021-11-07 01:10:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 466 states have (on average 1.7274678111587982) internal successors, (805), 467 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 805 transitions. [2021-11-07 01:10:30,693 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 805 transitions. Word has length 48 [2021-11-07 01:10:30,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 805 transitions. [2021-11-07 01:10:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 805 transitions. [2021-11-07 01:10:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:10:30,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:30,696 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] [2021-11-07 01:10:30,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:30,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:30,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2118623159, now seen corresponding path program 1 times [2021-11-07 01:10:30,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:30,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729499713] [2021-11-07 01:10:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:30,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:30,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:30,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:10:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:31,508 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 01:10:31,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:31,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:31,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729499713] [2021-11-07 01:10:31,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729499713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:31,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:31,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:31,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165798997] [2021-11-07 01:10:31,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:31,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:31,630 INFO L87 Difference]: Start difference. First operand 468 states and 805 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:31,704 INFO L93 Difference]: Finished difference Result 933 states and 1607 transitions. [2021-11-07 01:10:31,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:10:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:31,708 INFO L225 Difference]: With dead ends: 933 [2021-11-07 01:10:31,708 INFO L226 Difference]: Without dead ends: 473 [2021-11-07 01:10:31,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 01:10:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-07 01:10:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 468. [2021-11-07 01:10:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 466 states have (on average 1.7210300429184548) internal successors, (802), 467 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 802 transitions. [2021-11-07 01:10:31,743 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 802 transitions. Word has length 49 [2021-11-07 01:10:31,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:31,743 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 802 transitions. [2021-11-07 01:10:31,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 802 transitions. [2021-11-07 01:10:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:10:31,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:31,745 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:31,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:31,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:31,960 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash -375775102, now seen corresponding path program 1 times [2021-11-07 01:10:31,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:31,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659901130] [2021-11-07 01:10:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:31,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:31,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:31,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:32,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:10:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:32,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:32,691 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 01:10:32,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:32,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659901130] [2021-11-07 01:10:32,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659901130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:32,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:32,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:32,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969331461] [2021-11-07 01:10:32,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:32,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:32,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:32,695 INFO L87 Difference]: Start difference. First operand 468 states and 802 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:32,911 INFO L93 Difference]: Finished difference Result 1780 states and 3074 transitions. [2021-11-07 01:10:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:10:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:32,922 INFO L225 Difference]: With dead ends: 1780 [2021-11-07 01:10:32,922 INFO L226 Difference]: Without dead ends: 1338 [2021-11-07 01:10:32,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:10:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-11-07 01:10:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 468. [2021-11-07 01:10:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 466 states have (on average 1.7145922746781115) internal successors, (799), 467 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 799 transitions. [2021-11-07 01:10:32,983 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 799 transitions. Word has length 50 [2021-11-07 01:10:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:32,984 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 799 transitions. [2021-11-07 01:10:32,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 799 transitions. [2021-11-07 01:10:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:10:32,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:32,987 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:33,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:33,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:33,206 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:33,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2069506407, now seen corresponding path program 1 times [2021-11-07 01:10:33,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:33,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50672126] [2021-11-07 01:10:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:33,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:33,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:10:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:33,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:33,750 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 01:10:33,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:33,881 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 01:10:33,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:33,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50672126] [2021-11-07 01:10:33,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50672126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:33,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:33,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:33,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509262408] [2021-11-07 01:10:33,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:33,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:33,883 INFO L87 Difference]: Start difference. First operand 468 states and 799 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:33,991 INFO L93 Difference]: Finished difference Result 1134 states and 1937 transitions. [2021-11-07 01:10:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:10:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:33,997 INFO L225 Difference]: With dead ends: 1134 [2021-11-07 01:10:33,998 INFO L226 Difference]: Without dead ends: 910 [2021-11-07 01:10:33,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-11-07 01:10:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 686. [2021-11-07 01:10:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 684 states have (on average 1.75) internal successors, (1197), 685 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:34,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1197 transitions. [2021-11-07 01:10:34,057 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1197 transitions. Word has length 52 [2021-11-07 01:10:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:34,058 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 1197 transitions. [2021-11-07 01:10:34,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1197 transitions. [2021-11-07 01:10:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:10:34,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:34,060 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] [2021-11-07 01:10:34,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:34,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:34,280 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash -7761258, now seen corresponding path program 1 times [2021-11-07 01:10:34,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:34,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843799898] [2021-11-07 01:10:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:34,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:34,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:34,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:10:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:34,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:34,923 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 01:10:34,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:35,052 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 01:10:35,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:35,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843799898] [2021-11-07 01:10:35,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843799898] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:35,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:35,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:35,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795208313] [2021-11-07 01:10:35,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:35,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:35,055 INFO L87 Difference]: Start difference. First operand 686 states and 1197 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 01:10:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:35,169 INFO L93 Difference]: Finished difference Result 1678 states and 2932 transitions. [2021-11-07 01:10:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 64 [2021-11-07 01:10:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:35,183 INFO L225 Difference]: With dead ends: 1678 [2021-11-07 01:10:35,183 INFO L226 Difference]: Without dead ends: 1076 [2021-11-07 01:10:35,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 01:10:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-11-07 01:10:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 852. [2021-11-07 01:10:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 850 states have (on average 1.7623529411764707) internal successors, (1498), 851 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1498 transitions. [2021-11-07 01:10:35,254 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1498 transitions. Word has length 64 [2021-11-07 01:10:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:35,254 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1498 transitions. [2021-11-07 01:10:35,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 01:10:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1498 transitions. [2021-11-07 01:10:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:10:35,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:35,257 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:35,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:10:35,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:35,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash 394850967, now seen corresponding path program 1 times [2021-11-07 01:10:35,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:35,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878461165] [2021-11-07 01:10:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:35,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:35,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:35,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:35,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:10:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:36,128 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 01:10:36,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:36,313 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 01:10:36,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:36,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878461165] [2021-11-07 01:10:36,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878461165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:36,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:36,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:36,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040244743] [2021-11-07 01:10:36,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:36,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:36,320 INFO L87 Difference]: Start difference. First operand 852 states and 1498 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:36,455 INFO L93 Difference]: Finished difference Result 2208 states and 3900 transitions. [2021-11-07 01:10:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:10:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:36,465 INFO L225 Difference]: With dead ends: 2208 [2021-11-07 01:10:36,465 INFO L226 Difference]: Without dead ends: 1448 [2021-11-07 01:10:36,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 01:10:36,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-11-07 01:10:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1224. [2021-11-07 01:10:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1222 states have (on average 1.7806873977086743) internal successors, (2176), 1223 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2176 transitions. [2021-11-07 01:10:36,579 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2176 transitions. Word has length 65 [2021-11-07 01:10:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:36,579 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2176 transitions. [2021-11-07 01:10:36,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2176 transitions. [2021-11-07 01:10:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:10:36,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:36,582 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] [2021-11-07 01:10:36,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:36,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:36,801 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1951820840, now seen corresponding path program 1 times [2021-11-07 01:10:36,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:36,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98628170] [2021-11-07 01:10:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:36,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:36,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:36,803 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:36,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:10:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:37,450 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 01:10:37,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:37,600 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 01:10:37,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:37,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98628170] [2021-11-07 01:10:37,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98628170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:37,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:37,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:37,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528454775] [2021-11-07 01:10:37,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:37,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:37,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:37,603 INFO L87 Difference]: Start difference. First operand 1224 states and 2176 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:37,789 INFO L93 Difference]: Finished difference Result 3304 states and 5903 transitions. [2021-11-07 01:10:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 01:10:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:37,803 INFO L225 Difference]: With dead ends: 3304 [2021-11-07 01:10:37,804 INFO L226 Difference]: Without dead ends: 2180 [2021-11-07 01:10:37,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:10:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-11-07 01:10:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1956. [2021-11-07 01:10:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1954 states have (on average 1.7968270214943705) internal successors, (3511), 1955 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3511 transitions. [2021-11-07 01:10:37,967 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3511 transitions. Word has length 66 [2021-11-07 01:10:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:37,968 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 3511 transitions. [2021-11-07 01:10:37,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3511 transitions. [2021-11-07 01:10:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:10:37,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:37,972 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] [2021-11-07 01:10:37,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 01:10:38,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:38,189 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:38,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1122255192, now seen corresponding path program 1 times [2021-11-07 01:10:38,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:38,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637642095] [2021-11-07 01:10:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:38,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:38,191 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:38,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:10:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:38,867 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 01:10:38,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:39,029 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 01:10:39,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:39,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637642095] [2021-11-07 01:10:39,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637642095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:39,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:39,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:39,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874386610] [2021-11-07 01:10:39,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:39,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:39,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:39,032 INFO L87 Difference]: Start difference. First operand 1956 states and 3511 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 01:10:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:39,265 INFO L93 Difference]: Finished difference Result 5236 states and 9427 transitions. [2021-11-07 01:10:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 67 [2021-11-07 01:10:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:39,288 INFO L225 Difference]: With dead ends: 5236 [2021-11-07 01:10:39,288 INFO L226 Difference]: Without dead ends: 3414 [2021-11-07 01:10:39,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:10:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3414 states. [2021-11-07 01:10:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3414 to 3190. [2021-11-07 01:10:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 3188 states have (on average 1.8055207026348807) internal successors, (5756), 3189 states have internal predecessors, (5756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 5756 transitions. [2021-11-07 01:10:39,560 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 5756 transitions. Word has length 67 [2021-11-07 01:10:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:39,560 INFO L470 AbstractCegarLoop]: Abstraction has 3190 states and 5756 transitions. [2021-11-07 01:10:39,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 01:10:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 5756 transitions. [2021-11-07 01:10:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:10:39,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:39,566 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:39,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:39,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:39,783 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:39,783 INFO L85 PathProgramCache]: Analyzing trace with hash -398876649, now seen corresponding path program 1 times [2021-11-07 01:10:39,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:39,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830710049] [2021-11-07 01:10:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:39,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:39,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:39,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:10:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:40,457 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 01:10:40,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:40,601 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 01:10:40,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:40,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830710049] [2021-11-07 01:10:40,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830710049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:40,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:40,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:40,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998585772] [2021-11-07 01:10:40,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:40,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:40,604 INFO L87 Difference]: Start difference. First operand 3190 states and 5756 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:40,992 INFO L93 Difference]: Finished difference Result 8654 states and 15645 transitions. [2021-11-07 01:10:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:10:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:41,028 INFO L225 Difference]: With dead ends: 8654 [2021-11-07 01:10:41,028 INFO L226 Difference]: Without dead ends: 5632 [2021-11-07 01:10:41,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:10:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-11-07 01:10:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 5408. [2021-11-07 01:10:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 5406 states have (on average 1.8092859785423603) internal successors, (9781), 5407 states have internal predecessors, (9781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 9781 transitions. [2021-11-07 01:10:41,479 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 9781 transitions. Word has length 68 [2021-11-07 01:10:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:41,481 INFO L470 AbstractCegarLoop]: Abstraction has 5408 states and 9781 transitions. [2021-11-07 01:10:41,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 9781 transitions. [2021-11-07 01:10:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:10:41,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:41,487 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 01:10:41,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:41,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:41,706 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:41,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:41,707 INFO L85 PathProgramCache]: Analyzing trace with hash -893800521, now seen corresponding path program 1 times [2021-11-07 01:10:41,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:41,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126021214] [2021-11-07 01:10:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:41,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:41,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:41,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:41,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:10:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:42,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:42,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:42,463 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 01:10:42,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:42,637 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 01:10:42,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:42,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126021214] [2021-11-07 01:10:42,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126021214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:42,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:42,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:42,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37052368] [2021-11-07 01:10:42,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:42,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:42,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:42,640 INFO L87 Difference]: Start difference. First operand 5408 states and 9781 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:43,237 INFO L93 Difference]: Finished difference Result 15634 states and 28331 transitions. [2021-11-07 01:10:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:10:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:43,293 INFO L225 Difference]: With dead ends: 15634 [2021-11-07 01:10:43,293 INFO L226 Difference]: Without dead ends: 10402 [2021-11-07 01:10:43,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:10:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2021-11-07 01:10:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 10178. [2021-11-07 01:10:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10178 states, 10176 states have (on average 1.8119103773584906) internal successors, (18438), 10177 states have internal predecessors, (18438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10178 states to 10178 states and 18438 transitions. [2021-11-07 01:10:44,064 INFO L78 Accepts]: Start accepts. Automaton has 10178 states and 18438 transitions. Word has length 69 [2021-11-07 01:10:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:44,064 INFO L470 AbstractCegarLoop]: Abstraction has 10178 states and 18438 transitions. [2021-11-07 01:10:44,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 10178 states and 18438 transitions. [2021-11-07 01:10:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:10:44,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:44,073 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:44,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:44,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:44,289 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:44,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1962977593, now seen corresponding path program 1 times [2021-11-07 01:10:44,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:44,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369870865] [2021-11-07 01:10:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:44,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:44,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:44,291 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:44,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:10:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:44,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:10:45,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:10:45,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:45,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369870865] [2021-11-07 01:10:45,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369870865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:45,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:45,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:45,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90188695] [2021-11-07 01:10:45,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:45,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:45,313 INFO L87 Difference]: Start difference. First operand 10178 states and 18438 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:48,407 INFO L93 Difference]: Finished difference Result 25093 states and 45467 transitions. [2021-11-07 01:10:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:10:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:48,461 INFO L225 Difference]: With dead ends: 25093 [2021-11-07 01:10:48,461 INFO L226 Difference]: Without dead ends: 15169 [2021-11-07 01:10:48,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 01:10:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15169 states. [2021-11-07 01:10:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15169 to 10145. [2021-11-07 01:10:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10143 states have (on average 1.8047914818101154) internal successors, (18306), 10144 states have internal predecessors, (18306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 18306 transitions. [2021-11-07 01:10:49,162 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 18306 transitions. Word has length 70 [2021-11-07 01:10:49,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:49,162 INFO L470 AbstractCegarLoop]: Abstraction has 10145 states and 18306 transitions. [2021-11-07 01:10:49,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 18306 transitions. [2021-11-07 01:10:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:10:49,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:49,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:49,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:49,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:49,385 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:49,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1735577848, now seen corresponding path program 1 times [2021-11-07 01:10:49,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:49,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431583354] [2021-11-07 01:10:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:49,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:49,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:49,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:49,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:10:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:50,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:50,270 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 01:10:50,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:50,452 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 01:10:50,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:50,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431583354] [2021-11-07 01:10:50,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431583354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:50,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:50,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:50,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361259685] [2021-11-07 01:10:50,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:50,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:50,454 INFO L87 Difference]: Start difference. First operand 10145 states and 18306 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:51,325 INFO L93 Difference]: Finished difference Result 29677 states and 53613 transitions. [2021-11-07 01:10:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:10:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:51,371 INFO L225 Difference]: With dead ends: 29677 [2021-11-07 01:10:51,371 INFO L226 Difference]: Without dead ends: 19715 [2021-11-07 01:10:51,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19715 states. [2021-11-07 01:10:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19715 to 19491. [2021-11-07 01:10:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19491 states, 19489 states have (on average 1.8046590384319359) internal successors, (35171), 19490 states have internal predecessors, (35171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19491 states to 19491 states and 35171 transitions. [2021-11-07 01:10:52,921 INFO L78 Accepts]: Start accepts. Automaton has 19491 states and 35171 transitions. Word has length 70 [2021-11-07 01:10:52,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:52,922 INFO L470 AbstractCegarLoop]: Abstraction has 19491 states and 35171 transitions. [2021-11-07 01:10:52,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 19491 states and 35171 transitions. [2021-11-07 01:10:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:10:52,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:52,931 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 01:10:52,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:53,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:53,146 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1166136392, now seen corresponding path program 1 times [2021-11-07 01:10:53,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:53,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923222202] [2021-11-07 01:10:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:53,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:53,149 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:53,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:10:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:53,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:53,951 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 01:10:53,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:54,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:54,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923222202] [2021-11-07 01:10:54,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923222202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:54,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:54,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:54,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161058628] [2021-11-07 01:10:54,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:54,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:54,109 INFO L87 Difference]: Start difference. First operand 19491 states and 35171 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:55,678 INFO L93 Difference]: Finished difference Result 57901 states and 104522 transitions. [2021-11-07 01:10:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:10:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:55,771 INFO L225 Difference]: With dead ends: 57901 [2021-11-07 01:10:55,771 INFO L226 Difference]: Without dead ends: 38597 [2021-11-07 01:10:55,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38597 states. [2021-11-07 01:10:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38597 to 38373. [2021-11-07 01:10:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38373 states, 38371 states have (on average 1.8022986109301296) internal successors, (69156), 38372 states have internal predecessors, (69156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38373 states to 38373 states and 69156 transitions. [2021-11-07 01:10:57,732 INFO L78 Accepts]: Start accepts. Automaton has 38373 states and 69156 transitions. Word has length 71 [2021-11-07 01:10:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:57,732 INFO L470 AbstractCegarLoop]: Abstraction has 38373 states and 69156 transitions. [2021-11-07 01:10:57,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 38373 states and 69156 transitions. [2021-11-07 01:10:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:10:57,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:57,741 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:57,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:10:57,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:57,957 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:10:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -55331135, now seen corresponding path program 1 times [2021-11-07 01:10:57,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:57,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880062957] [2021-11-07 01:10:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:57,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:57,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:57,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:57,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:10:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:58,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:10:58,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:10:59,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:59,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880062957] [2021-11-07 01:10:59,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880062957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:59,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:59,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:59,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225412784] [2021-11-07 01:10:59,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:59,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:59,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:59,072 INFO L87 Difference]: Start difference. First operand 38373 states and 69156 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:05,514 INFO L93 Difference]: Finished difference Result 148889 states and 268171 transitions. [2021-11-07 01:11:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:11:05,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:11:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:05,754 INFO L225 Difference]: With dead ends: 148889 [2021-11-07 01:11:05,754 INFO L226 Difference]: Without dead ends: 110769 [2021-11-07 01:11:05,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:11:06,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110769 states. [2021-11-07 01:11:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110769 to 38115. [2021-11-07 01:11:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38115 states, 38113 states have (on average 1.787421614672159) internal successors, (68124), 38114 states have internal predecessors, (68124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38115 states to 38115 states and 68124 transitions. [2021-11-07 01:11:08,880 INFO L78 Accepts]: Start accepts. Automaton has 38115 states and 68124 transitions. Word has length 72 [2021-11-07 01:11:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:08,880 INFO L470 AbstractCegarLoop]: Abstraction has 38115 states and 68124 transitions. [2021-11-07 01:11:08,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38115 states and 68124 transitions. [2021-11-07 01:11:09,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:11:09,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:09,036 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:09,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:09,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:09,237 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:09,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1613662749, now seen corresponding path program 1 times [2021-11-07 01:11:09,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:09,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926819501] [2021-11-07 01:11:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:09,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:09,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:09,238 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:09,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:11:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:10,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:10,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:10,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926819501] [2021-11-07 01:11:10,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926819501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:10,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:10,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:10,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967291441] [2021-11-07 01:11:10,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:10,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:10,235 INFO L87 Difference]: Start difference. First operand 38115 states and 68124 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:12,060 INFO L93 Difference]: Finished difference Result 76195 states and 136190 transitions. [2021-11-07 01:11:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:11:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:12,126 INFO L225 Difference]: With dead ends: 76195 [2021-11-07 01:11:12,126 INFO L226 Difference]: Without dead ends: 38339 [2021-11-07 01:11:12,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:12,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38339 states. [2021-11-07 01:11:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38339 to 38115. [2021-11-07 01:11:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38115 states, 38113 states have (on average 1.7840631805420724) internal successors, (67996), 38114 states have internal predecessors, (67996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38115 states to 38115 states and 67996 transitions. [2021-11-07 01:11:14,189 INFO L78 Accepts]: Start accepts. Automaton has 38115 states and 67996 transitions. Word has length 72 [2021-11-07 01:11:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:14,189 INFO L470 AbstractCegarLoop]: Abstraction has 38115 states and 67996 transitions. [2021-11-07 01:11:14,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 38115 states and 67996 transitions. [2021-11-07 01:11:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:11:14,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:14,195 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:14,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:14,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:14,400 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:11:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1396684202, now seen corresponding path program 1 times [2021-11-07 01:11:14,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:14,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828793650] [2021-11-07 01:11:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:14,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:14,402 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:14,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50ee6b20-83c1-4cf8-9344-40b7bb767b4b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:11:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:15,242 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 01:11:15,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:15,404 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 01:11:15,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:15,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828793650] [2021-11-07 01:11:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828793650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:15,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:15,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942381390] [2021-11-07 01:11:15,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:15,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:15,410 INFO L87 Difference]: Start difference. First operand 38115 states and 67996 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:18,589 INFO L93 Difference]: Finished difference Result 105933 states and 188616 transitions. [2021-11-07 01:11:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:11:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:18,703 INFO L225 Difference]: With dead ends: 105933 [2021-11-07 01:11:18,703 INFO L226 Difference]: Without dead ends: 68037 [2021-11-07 01:11:18,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:18,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68037 states.