./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product23.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_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/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_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/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_4e8d365b-5481-4ea4-953e-8458586d83b4/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 aa34593061e3e0a5eeea5cc3a3930a050ef50f60dff03c88799c643f69d7f641 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:19:13,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:19:13,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:19:13,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:19:13,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:19:13,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:19:13,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:19:13,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:19:13,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:19:13,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:19:13,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:19:13,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:19:13,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:19:13,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:19:13,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:19:13,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:19:13,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:19:13,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:19:13,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:19:13,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:19:13,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:19:13,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:19:13,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:19:13,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:19:13,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:19:13,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:19:13,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:19:13,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:19:13,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:19:13,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:19:13,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:19:13,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:19:13,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:19:13,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:19:13,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:19:13,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:19:13,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:19:13,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:19:13,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:19:13,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:19:13,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:19:13,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:19:13,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:19:13,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:19:13,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:19:13,432 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:19:13,432 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:19:13,432 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:19:13,433 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:19:13,433 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:19:13,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:19:13,440 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:19:13,440 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:19:13,440 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:19:13,440 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:19:13,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:19:13,441 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:19:13,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:19:13,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:19:13,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:19:13,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:19:13,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:19:13,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:19:13,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:19:13,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:19:13,443 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:19:13,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:19:13,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:19:13,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:19:13,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:19:13,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:19:13,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:19:13,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:13,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:19:13,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:19:13,445 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:19:13,445 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:19:13,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:19:13,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:19:13,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:19:13,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:19:13,446 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_4e8d365b-5481-4ea4-953e-8458586d83b4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34593061e3e0a5eeea5cc3a3930a050ef50f60dff03c88799c643f69d7f641 [2021-11-07 01:19:13,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:19:13,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:19:13,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:19:13,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:19:13,780 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:19:13,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product23.cil.c [2021-11-07 01:19:13,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/c4b14015e/1f22f1376e1841589bd06230f857b614/FLAG299ea7471 [2021-11-07 01:19:14,497 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:19:14,497 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/sv-benchmarks/c/product-lines/email_spec4_product23.cil.c [2021-11-07 01:19:14,529 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/c4b14015e/1f22f1376e1841589bd06230f857b614/FLAG299ea7471 [2021-11-07 01:19:14,857 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/c4b14015e/1f22f1376e1841589bd06230f857b614 [2021-11-07 01:19:14,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:19:14,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:19:14,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:14,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:19:14,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:19:14,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:14" (1/1) ... [2021-11-07 01:19:14,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758f92e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:14, skipping insertion in model container [2021-11-07 01:19:14,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:14" (1/1) ... [2021-11-07 01:19:14,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:19:14,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:15,595 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_4e8d365b-5481-4ea4-953e-8458586d83b4/sv-benchmarks/c/product-lines/email_spec4_product23.cil.c[63051,63064] [2021-11-07 01:19:15,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:15,621 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 01:19:15,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73185e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:15, skipping insertion in model container [2021-11-07 01:19:15,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:15,623 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:19:15,626 INFO L168 Benchmark]: Toolchain (without parser) took 760.21 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 58.2 MB in the beginning and 84.4 MB in the end (delta: -26.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:19:15,627 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:19:15,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 754.28 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 58.1 MB in the beginning and 84.4 MB in the end (delta: -26.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:19:15,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 754.28 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 58.1 MB in the beginning and 84.4 MB in the end (delta: -26.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1157]: 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_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/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_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/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_4e8d365b-5481-4ea4-953e-8458586d83b4/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 aa34593061e3e0a5eeea5cc3a3930a050ef50f60dff03c88799c643f69d7f641 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:19:17,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:19:17,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:19:17,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:19:17,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:19:17,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:19:17,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:19:17,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:19:17,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:19:17,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:19:17,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:19:17,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:19:17,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:19:17,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:19:17,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:19:17,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:19:17,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:19:17,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:19:17,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:19:17,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:19:17,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:19:17,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:19:17,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:19:17,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:19:17,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:19:17,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:19:17,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:19:17,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:19:17,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:19:17,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:19:17,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:19:17,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:19:17,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:19:17,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:19:17,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:19:17,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:19:17,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:19:17,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:19:17,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:19:17,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:19:17,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:19:17,965 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:19:18,003 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:19:18,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:19:18,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:19:18,006 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:19:18,006 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:19:18,006 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:19:18,006 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:19:18,007 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:19:18,007 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:19:18,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:19:18,009 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:19:18,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:19:18,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:19:18,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:19:18,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:19:18,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:19:18,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:19:18,011 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:19:18,011 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:19:18,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:19:18,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:19:18,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:19:18,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:19:18,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:19:18,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:19:18,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:19:18,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:18,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:19:18,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:19:18,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:19:18,014 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:19:18,014 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:18,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:19:18,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:19:18,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:19:18,015 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_4e8d365b-5481-4ea4-953e-8458586d83b4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34593061e3e0a5eeea5cc3a3930a050ef50f60dff03c88799c643f69d7f641 [2021-11-07 01:19:18,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:19:18,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:19:18,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:19:18,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:19:18,483 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:19:18,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product23.cil.c [2021-11-07 01:19:18,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/89ebe85ca/de2f1b86c33a48a69181539856760d4f/FLAGf69d5defd [2021-11-07 01:19:19,404 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:19:19,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/sv-benchmarks/c/product-lines/email_spec4_product23.cil.c [2021-11-07 01:19:19,454 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/89ebe85ca/de2f1b86c33a48a69181539856760d4f/FLAGf69d5defd [2021-11-07 01:19:19,470 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/data/89ebe85ca/de2f1b86c33a48a69181539856760d4f [2021-11-07 01:19:19,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:19:19,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:19:19,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:19,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:19:19,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:19:19,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:19" (1/1) ... [2021-11-07 01:19:19,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124f85c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:19, skipping insertion in model container [2021-11-07 01:19:19,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:19" (1/1) ... [2021-11-07 01:19:19,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:19:19,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:20,205 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_4e8d365b-5481-4ea4-953e-8458586d83b4/sv-benchmarks/c/product-lines/email_spec4_product23.cil.c[63051,63064] [2021-11-07 01:19:20,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:20,239 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:19:20,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:20,417 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_4e8d365b-5481-4ea4-953e-8458586d83b4/sv-benchmarks/c/product-lines/email_spec4_product23.cil.c[63051,63064] [2021-11-07 01:19:20,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:20,431 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:19:20,533 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_4e8d365b-5481-4ea4-953e-8458586d83b4/sv-benchmarks/c/product-lines/email_spec4_product23.cil.c[63051,63064] [2021-11-07 01:19:20,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:20,587 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:19:20,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20 WrapperNode [2021-11-07 01:19:20,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:20,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:20,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:19:20,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:19:20,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:20,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:19:20,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:19:20,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:19:20,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:20,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:19:20,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:19:20,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:19:20,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:19:20,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (1/1) ... [2021-11-07 01:19:21,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:21,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:21,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:19:21,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:19:21,084 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:19:21,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:19:21,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:19:21,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:19:21,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:19:26,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:19:26,602 INFO L299 CfgBuilder]: Removed 513 assume(true) statements. [2021-11-07 01:19:26,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:26 BoogieIcfgContainer [2021-11-07 01:19:26,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:19:26,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:19:26,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:19:26,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:19:26,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:19:19" (1/3) ... [2021-11-07 01:19:26,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e08aead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:26, skipping insertion in model container [2021-11-07 01:19:26,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:20" (2/3) ... [2021-11-07 01:19:26,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e08aead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:26, skipping insertion in model container [2021-11-07 01:19:26,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:26" (3/3) ... [2021-11-07 01:19:26,617 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product23.cil.c [2021-11-07 01:19:26,624 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:19:26,625 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:19:26,692 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:19:26,700 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 01:19:26,701 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:19:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 798 states, 791 states have (on average 1.7623261694058154) internal successors, (1394), 797 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:19:26,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:26,754 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:26,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:26,760 INFO L85 PathProgramCache]: Analyzing trace with hash 696940052, now seen corresponding path program 1 times [2021-11-07 01:19:26,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:26,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785586422] [2021-11-07 01:19:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:26,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:26,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:19:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:27,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:19:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:27,419 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 01:19:27,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:27,546 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 01:19:27,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:27,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785586422] [2021-11-07 01:19:27,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785586422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:27,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:27,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:19:27,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215815091] [2021-11-07 01:19:27,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:19:27,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:19:27,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:19:27,572 INFO L87 Difference]: Start difference. First operand has 798 states, 791 states have (on average 1.7623261694058154) internal successors, (1394), 797 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:27,675 INFO L93 Difference]: Finished difference Result 1311 states and 2265 transitions. [2021-11-07 01:19:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:19:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 01:19:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:27,703 INFO L225 Difference]: With dead ends: 1311 [2021-11-07 01:19:27,704 INFO L226 Difference]: Without dead ends: 700 [2021-11-07 01:19:27,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:19:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-07 01:19:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2021-11-07 01:19:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.7536023054755043) internal successors, (1217), 699 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1217 transitions. [2021-11-07 01:19:27,818 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1217 transitions. Word has length 43 [2021-11-07 01:19:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:27,819 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1217 transitions. [2021-11-07 01:19:27,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1217 transitions. [2021-11-07 01:19:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:19:27,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:27,828 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] [2021-11-07 01:19:27,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:28,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:28,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:28,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1350029276, now seen corresponding path program 1 times [2021-11-07 01:19:28,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:28,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019408826] [2021-11-07 01:19:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:28,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:28,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:28,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:19:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:28,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:28,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:28,866 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 01:19:28,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:28,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019408826] [2021-11-07 01:19:28,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019408826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:28,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:28,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:19:28,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586413166] [2021-11-07 01:19:28,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:28,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:28,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:28,871 INFO L87 Difference]: Start difference. First operand 700 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:28,992 INFO L93 Difference]: Finished difference Result 2070 states and 3603 transitions. [2021-11-07 01:19:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 44 [2021-11-07 01:19:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:29,002 INFO L225 Difference]: With dead ends: 2070 [2021-11-07 01:19:29,003 INFO L226 Difference]: Without dead ends: 1385 [2021-11-07 01:19:29,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 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 01:19:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-11-07 01:19:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 699. [2021-11-07 01:19:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 693 states have (on average 1.748917748917749) internal successors, (1212), 698 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1212 transitions. [2021-11-07 01:19:29,041 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1212 transitions. Word has length 44 [2021-11-07 01:19:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:29,041 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 1212 transitions. [2021-11-07 01:19:29,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1212 transitions. [2021-11-07 01:19:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:19:29,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:29,044 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 01:19:29,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:29,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:29,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash 138552502, now seen corresponding path program 1 times [2021-11-07 01:19:29,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:29,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564460203] [2021-11-07 01:19:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:29,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:29,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:29,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:29,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:19:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:19:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:29,853 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 01:19:29,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:29,988 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 01:19:29,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:29,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564460203] [2021-11-07 01:19:29,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564460203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:29,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:19:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957529915] [2021-11-07 01:19:29,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:29,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:29,991 INFO L87 Difference]: Start difference. First operand 699 states and 1212 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:30,295 INFO L93 Difference]: Finished difference Result 2713 states and 4710 transitions. [2021-11-07 01:19:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:30,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:19:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:30,310 INFO L225 Difference]: With dead ends: 2713 [2021-11-07 01:19:30,310 INFO L226 Difference]: Without dead ends: 2032 [2021-11-07 01:19:30,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 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 01:19:30,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-11-07 01:19:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 698. [2021-11-07 01:19:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 692 states have (on average 1.745664739884393) internal successors, (1208), 697 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1208 transitions. [2021-11-07 01:19:30,381 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1208 transitions. Word has length 46 [2021-11-07 01:19:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:30,382 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1208 transitions. [2021-11-07 01:19:30,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1208 transitions. [2021-11-07 01:19:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:19:30,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:30,384 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] [2021-11-07 01:19:30,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:30,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:30,598 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash 247677251, now seen corresponding path program 1 times [2021-11-07 01:19:30,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:30,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893166251] [2021-11-07 01:19:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:30,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:30,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:30,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:30,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:19:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:19:31,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:31,142 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 01:19:31,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:31,282 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 01:19:31,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:31,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893166251] [2021-11-07 01:19:31,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893166251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:31,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:31,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:19:31,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206461390] [2021-11-07 01:19:31,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:31,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:31,286 INFO L87 Difference]: Start difference. First operand 698 states and 1208 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:31,369 INFO L93 Difference]: Finished difference Result 1393 states and 2413 transitions. [2021-11-07 01:19:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 47 [2021-11-07 01:19:31,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:31,374 INFO L225 Difference]: With dead ends: 1393 [2021-11-07 01:19:31,374 INFO L226 Difference]: Without dead ends: 703 [2021-11-07 01:19:31,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 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 01:19:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-07 01:19:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 698. [2021-11-07 01:19:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 692 states have (on average 1.7413294797687862) internal successors, (1205), 697 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1205 transitions. [2021-11-07 01:19:31,419 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1205 transitions. Word has length 47 [2021-11-07 01:19:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:31,419 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1205 transitions. [2021-11-07 01:19:31,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1205 transitions. [2021-11-07 01:19:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:19:31,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:31,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:31,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:31,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:31,635 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash 835025102, now seen corresponding path program 1 times [2021-11-07 01:19:31,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:31,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371974249] [2021-11-07 01:19:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:31,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:31,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:31,638 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:31,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:19:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:32,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:19:32,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:32,224 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 01:19:32,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:32,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:32,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371974249] [2021-11-07 01:19:32,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371974249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:32,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:32,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:19:32,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756199270] [2021-11-07 01:19:32,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:32,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:32,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:32,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:32,393 INFO L87 Difference]: Start difference. First operand 698 states and 1205 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:32,754 INFO L93 Difference]: Finished difference Result 2700 states and 4686 transitions. [2021-11-07 01:19:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:32,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:19:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:32,771 INFO L225 Difference]: With dead ends: 2700 [2021-11-07 01:19:32,771 INFO L226 Difference]: Without dead ends: 2028 [2021-11-07 01:19:32,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:19:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-11-07 01:19:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 698. [2021-11-07 01:19:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 692 states have (on average 1.7369942196531791) internal successors, (1202), 697 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1202 transitions. [2021-11-07 01:19:32,865 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1202 transitions. Word has length 48 [2021-11-07 01:19:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:32,865 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 1202 transitions. [2021-11-07 01:19:32,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1202 transitions. [2021-11-07 01:19:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:19:32,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:32,868 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 01:19:32,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:33,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:33,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1991477517, now seen corresponding path program 1 times [2021-11-07 01:19:33,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:33,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478774997] [2021-11-07 01:19:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:33,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:33,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:33,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:19:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:33,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:33,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:33,634 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 01:19:33,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:33,768 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 01:19:33,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:33,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478774997] [2021-11-07 01:19:33,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478774997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:33,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:33,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:19:33,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872823514] [2021-11-07 01:19:33,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:33,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:33,771 INFO L87 Difference]: Start difference. First operand 698 states and 1202 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 01:19:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:33,899 INFO L93 Difference]: Finished difference Result 1785 states and 3071 transitions. [2021-11-07 01:19:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:33,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:19:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:33,909 INFO L225 Difference]: With dead ends: 1785 [2021-11-07 01:19:33,910 INFO L226 Difference]: Without dead ends: 1370 [2021-11-07 01:19:33,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 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 01:19:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-11-07 01:19:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 955. [2021-11-07 01:19:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 949 states have (on average 1.7650158061116965) internal successors, (1675), 954 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1675 transitions. [2021-11-07 01:19:33,997 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1675 transitions. Word has length 50 [2021-11-07 01:19:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:33,997 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 1675 transitions. [2021-11-07 01:19:33,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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 01:19:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1675 transitions. [2021-11-07 01:19:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:19:33,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:33,999 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] [2021-11-07 01:19:34,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:34,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:34,214 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:34,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1687933182, now seen corresponding path program 1 times [2021-11-07 01:19:34,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:34,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846038271] [2021-11-07 01:19:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:34,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:34,217 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:19:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:34,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:34,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:34,840 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 01:19:34,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:35,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:35,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846038271] [2021-11-07 01:19:35,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846038271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:35,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:35,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:35,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150500017] [2021-11-07 01:19:35,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:35,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:35,021 INFO L87 Difference]: Start difference. First operand 955 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:35,176 INFO L93 Difference]: Finished difference Result 2446 states and 4291 transitions. [2021-11-07 01:19:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:19:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:35,189 INFO L225 Difference]: With dead ends: 2446 [2021-11-07 01:19:35,189 INFO L226 Difference]: Without dead ends: 1575 [2021-11-07 01:19:35,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 01:19:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-07 01:19:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1160. [2021-11-07 01:19:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1154 states have (on average 1.7772963604852687) internal successors, (2051), 1159 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 2051 transitions. [2021-11-07 01:19:35,303 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 2051 transitions. Word has length 62 [2021-11-07 01:19:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:35,307 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 2051 transitions. [2021-11-07 01:19:35,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 2051 transitions. [2021-11-07 01:19:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:19:35,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:35,310 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:35,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:35,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:35,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash 940415811, now seen corresponding path program 1 times [2021-11-07 01:19:35,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:35,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28108964] [2021-11-07 01:19:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:35,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:35,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:35,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:19:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:35,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:36,161 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 01:19:36,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:36,345 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 01:19:36,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:36,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28108964] [2021-11-07 01:19:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28108964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:36,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:36,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:36,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173721323] [2021-11-07 01:19:36,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:36,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:36,348 INFO L87 Difference]: Start difference. First operand 1160 states and 2051 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:36,528 INFO L93 Difference]: Finished difference Result 3093 states and 5484 transitions. [2021-11-07 01:19:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:19:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:36,545 INFO L225 Difference]: With dead ends: 3093 [2021-11-07 01:19:36,545 INFO L226 Difference]: Without dead ends: 2025 [2021-11-07 01:19:36,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:19:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-11-07 01:19:36,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1610. [2021-11-07 01:19:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1604 states have (on average 1.7948877805486285) internal successors, (2879), 1609 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2879 transitions. [2021-11-07 01:19:36,740 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2879 transitions. Word has length 63 [2021-11-07 01:19:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:36,740 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 2879 transitions. [2021-11-07 01:19:36,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2879 transitions. [2021-11-07 01:19:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:19:36,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:36,744 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 01:19:36,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:36,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:36,962 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:36,962 INFO L85 PathProgramCache]: Analyzing trace with hash -430029548, now seen corresponding path program 1 times [2021-11-07 01:19:36,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:36,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013291421] [2021-11-07 01:19:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:36,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:36,964 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:36,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:19:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:37,620 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 01:19:37,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:37,786 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 01:19:37,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:37,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013291421] [2021-11-07 01:19:37,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013291421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:37,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:37,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:37,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171883440] [2021-11-07 01:19:37,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:37,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:37,789 INFO L87 Difference]: Start difference. First operand 1610 states and 2879 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 01:19:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:38,041 INFO L93 Difference]: Finished difference Result 4423 states and 7937 transitions. [2021-11-07 01:19:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:38,041 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 01:19:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:38,060 INFO L225 Difference]: With dead ends: 4423 [2021-11-07 01:19:38,060 INFO L226 Difference]: Without dead ends: 2913 [2021-11-07 01:19:38,063 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 01:19:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2021-11-07 01:19:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2498. [2021-11-07 01:19:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2492 states have (on average 1.8113964686998394) internal successors, (4514), 2497 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 4514 transitions. [2021-11-07 01:19:38,286 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 4514 transitions. Word has length 64 [2021-11-07 01:19:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:38,286 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 4514 transitions. [2021-11-07 01:19:38,286 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 01:19:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 4514 transitions. [2021-11-07 01:19:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:19:38,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:38,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:38,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:38,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:38,491 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash 223754132, now seen corresponding path program 1 times [2021-11-07 01:19:38,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:38,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723974463] [2021-11-07 01:19:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:38,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:38,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:38,494 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:38,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:19:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:39,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:39,148 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 01:19:39,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:39,291 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 01:19:39,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:39,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723974463] [2021-11-07 01:19:39,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723974463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:39,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:39,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:39,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7732573] [2021-11-07 01:19:39,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:39,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:39,294 INFO L87 Difference]: Start difference. First operand 2498 states and 4514 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 01:19:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:39,568 INFO L93 Difference]: Finished difference Result 6823 states and 12361 transitions. [2021-11-07 01:19:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:39,569 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 01:19:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:39,597 INFO L225 Difference]: With dead ends: 6823 [2021-11-07 01:19:39,597 INFO L226 Difference]: Without dead ends: 4459 [2021-11-07 01:19:39,600 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 01:19:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2021-11-07 01:19:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 4044. [2021-11-07 01:19:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4038 states have (on average 1.8224368499257058) internal successors, (7359), 4043 states have internal predecessors, (7359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 7359 transitions. [2021-11-07 01:19:39,892 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 7359 transitions. Word has length 65 [2021-11-07 01:19:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:39,892 INFO L470 AbstractCegarLoop]: Abstraction has 4044 states and 7359 transitions. [2021-11-07 01:19:39,893 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 01:19:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 7359 transitions. [2021-11-07 01:19:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:19:39,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:39,897 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 01:19:39,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:40,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:40,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash 269199555, now seen corresponding path program 1 times [2021-11-07 01:19:40,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:40,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55296409] [2021-11-07 01:19:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:40,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:40,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:40,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:40,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:19:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:40,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:40,754 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 01:19:40,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:40,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:40,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55296409] [2021-11-07 01:19:40,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55296409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:40,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:40,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:40,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791648711] [2021-11-07 01:19:40,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:40,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:40,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:40,907 INFO L87 Difference]: Start difference. First operand 4044 states and 7359 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 01:19:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:41,297 INFO L93 Difference]: Finished difference Result 11177 states and 20379 transitions. [2021-11-07 01:19:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:41,303 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 01:19:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:41,356 INFO L225 Difference]: With dead ends: 11177 [2021-11-07 01:19:41,356 INFO L226 Difference]: Without dead ends: 7301 [2021-11-07 01:19:41,363 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 01:19:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-11-07 01:19:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 6886. [2021-11-07 01:19:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6886 states, 6880 states have (on average 1.8290697674418606) internal successors, (12584), 6885 states have internal predecessors, (12584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6886 states to 6886 states and 12584 transitions. [2021-11-07 01:19:41,864 INFO L78 Accepts]: Start accepts. Automaton has 6886 states and 12584 transitions. Word has length 66 [2021-11-07 01:19:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:41,864 INFO L470 AbstractCegarLoop]: Abstraction has 6886 states and 12584 transitions. [2021-11-07 01:19:41,865 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 01:19:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 6886 states and 12584 transitions. [2021-11-07 01:19:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:19:41,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:41,870 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 01:19:41,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:42,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:42,088 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:42,089 INFO L85 PathProgramCache]: Analyzing trace with hash 344662115, now seen corresponding path program 1 times [2021-11-07 01:19:42,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:42,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102477352] [2021-11-07 01:19:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:42,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:42,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:42,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:42,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:19:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:42,832 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 01:19:42,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:42,990 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 01:19:42,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:42,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102477352] [2021-11-07 01:19:42,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102477352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:42,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:42,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:42,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769033060] [2021-11-07 01:19:42,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:42,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:42,997 INFO L87 Difference]: Start difference. First operand 6886 states and 12584 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 01:19:43,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:43,632 INFO L93 Difference]: Finished difference Result 20161 states and 36896 transitions. [2021-11-07 01:19:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:43,633 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 01:19:43,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:43,671 INFO L225 Difference]: With dead ends: 20161 [2021-11-07 01:19:43,671 INFO L226 Difference]: Without dead ends: 13447 [2021-11-07 01:19:43,681 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 01:19:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13447 states. [2021-11-07 01:19:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13447 to 13032. [2021-11-07 01:19:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13032 states, 13026 states have (on average 1.8321050207277751) internal successors, (23865), 13031 states have internal predecessors, (23865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13032 states to 13032 states and 23865 transitions. [2021-11-07 01:19:44,588 INFO L78 Accepts]: Start accepts. Automaton has 13032 states and 23865 transitions. Word has length 67 [2021-11-07 01:19:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:44,588 INFO L470 AbstractCegarLoop]: Abstraction has 13032 states and 23865 transitions. [2021-11-07 01:19:44,589 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 01:19:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 13032 states and 23865 transitions. [2021-11-07 01:19:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:19:44,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:44,598 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] [2021-11-07 01:19:44,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:44,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:44,814 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1226669139, now seen corresponding path program 1 times [2021-11-07 01:19:44,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:44,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519357062] [2021-11-07 01:19:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:44,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:44,817 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:44,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:19:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:45,587 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 01:19:45,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:45,780 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 01:19:45,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:45,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519357062] [2021-11-07 01:19:45,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519357062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:45,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:45,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:19:45,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887159799] [2021-11-07 01:19:45,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:45,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:45,782 INFO L87 Difference]: Start difference. First operand 13032 states and 23865 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:48,950 INFO L93 Difference]: Finished difference Result 32265 states and 59086 transitions. [2021-11-07 01:19:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:19:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:19:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:49,027 INFO L225 Difference]: With dead ends: 32265 [2021-11-07 01:19:49,028 INFO L226 Difference]: Without dead ends: 19526 [2021-11-07 01:19:49,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 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 01:19:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19526 states. [2021-11-07 01:19:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19526 to 12999. [2021-11-07 01:19:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 12993 states have (on average 1.8265989378896328) internal successors, (23733), 12998 states have internal predecessors, (23733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 23733 transitions. [2021-11-07 01:19:50,025 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 23733 transitions. Word has length 68 [2021-11-07 01:19:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:50,026 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 23733 transitions. [2021-11-07 01:19:50,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 23733 transitions. [2021-11-07 01:19:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:19:50,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:50,034 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 01:19:50,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:50,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:50,247 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1792524300, now seen corresponding path program 1 times [2021-11-07 01:19:50,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:50,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755553790] [2021-11-07 01:19:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:50,248 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:50,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:50,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:50,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:19:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:50,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:50,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:50,983 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 01:19:50,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:51,141 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 01:19:51,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:51,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755553790] [2021-11-07 01:19:51,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755553790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:51,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:51,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:51,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237131947] [2021-11-07 01:19:51,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:51,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:51,143 INFO L87 Difference]: Start difference. First operand 12999 states and 23733 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 01:19:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:52,033 INFO L93 Difference]: Finished difference Result 38204 states and 69826 transitions. [2021-11-07 01:19:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:52,033 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 01:19:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:52,108 INFO L225 Difference]: With dead ends: 38204 [2021-11-07 01:19:52,109 INFO L226 Difference]: Without dead ends: 25384 [2021-11-07 01:19:52,124 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 01:19:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25384 states. [2021-11-07 01:19:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25384 to 24969. [2021-11-07 01:19:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24969 states, 24963 states have (on average 1.827584825541802) internal successors, (45622), 24968 states have internal predecessors, (45622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24969 states to 24969 states and 45622 transitions. [2021-11-07 01:19:53,523 INFO L78 Accepts]: Start accepts. Automaton has 24969 states and 45622 transitions. Word has length 68 [2021-11-07 01:19:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:53,524 INFO L470 AbstractCegarLoop]: Abstraction has 24969 states and 45622 transitions. [2021-11-07 01:19:53,524 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 01:19:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 24969 states and 45622 transitions. [2021-11-07 01:19:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:19:53,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:53,533 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 01:19:53,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:53,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:53,750 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:53,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1480480865, now seen corresponding path program 1 times [2021-11-07 01:19:53,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:53,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748705238] [2021-11-07 01:19:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:53,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:53,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:53,752 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:53,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:19:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:54,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:19:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:54,547 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 01:19:54,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:54,717 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 01:19:54,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:54,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748705238] [2021-11-07 01:19:54,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748705238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:54,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:54,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:19:54,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242600870] [2021-11-07 01:19:54,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:54,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:54,720 INFO L87 Difference]: Start difference. First operand 24969 states and 45622 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 01:19:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:56,316 INFO L93 Difference]: Finished difference Result 68753 states and 125229 transitions. [2021-11-07 01:19:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:56,317 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 01:19:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:56,403 INFO L225 Difference]: With dead ends: 68753 [2021-11-07 01:19:56,403 INFO L226 Difference]: Without dead ends: 44010 [2021-11-07 01:19:56,433 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 01:19:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44010 states. [2021-11-07 01:19:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44010 to 43595. [2021-11-07 01:19:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43595 states, 43589 states have (on average 1.8160315675973295) internal successors, (79159), 43594 states have internal predecessors, (79159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43595 states to 43595 states and 79159 transitions. [2021-11-07 01:19:59,087 INFO L78 Accepts]: Start accepts. Automaton has 43595 states and 79159 transitions. Word has length 69 [2021-11-07 01:19:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:59,088 INFO L470 AbstractCegarLoop]: Abstraction has 43595 states and 79159 transitions. [2021-11-07 01:19:59,088 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 01:19:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 43595 states and 79159 transitions. [2021-11-07 01:19:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:19:59,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:59,096 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] [2021-11-07 01:19:59,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:59,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:59,313 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:19:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1837264179, now seen corresponding path program 1 times [2021-11-07 01:19:59,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:59,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818031848] [2021-11-07 01:19:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:59,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:59,315 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:59,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:19:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:00,171 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 01:20:00,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:00,405 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 01:20:00,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:00,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818031848] [2021-11-07 01:20:00,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818031848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:00,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:00,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:20:00,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141819435] [2021-11-07 01:20:00,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:00,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:00,407 INFO L87 Difference]: Start difference. First operand 43595 states and 79159 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:07,830 INFO L93 Difference]: Finished difference Result 169660 states and 307958 transitions. [2021-11-07 01:20:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:20:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:20:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:08,131 INFO L225 Difference]: With dead ends: 169660 [2021-11-07 01:20:08,131 INFO L226 Difference]: Without dead ends: 126357 [2021-11-07 01:20:08,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 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 01:20:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126357 states. [2021-11-07 01:20:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126357 to 43337. [2021-11-07 01:20:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43337 states, 43331 states have (on average 1.803027855346057) internal successors, (78127), 43336 states have internal predecessors, (78127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43337 states to 43337 states and 78127 transitions. [2021-11-07 01:20:11,880 INFO L78 Accepts]: Start accepts. Automaton has 43337 states and 78127 transitions. Word has length 70 [2021-11-07 01:20:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:11,881 INFO L470 AbstractCegarLoop]: Abstraction has 43337 states and 78127 transitions. [2021-11-07 01:20:11,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 43337 states and 78127 transitions. [2021-11-07 01:20:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:20:11,888 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:11,889 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] [2021-11-07 01:20:11,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:12,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:12,103 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:20:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1293634961, now seen corresponding path program 1 times [2021-11-07 01:20:12,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:12,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107202042] [2021-11-07 01:20:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:12,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:12,105 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:12,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:20:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:12,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:12,928 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 01:20:12,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:13,081 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 01:20:13,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:13,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107202042] [2021-11-07 01:20:13,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107202042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:13,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:13,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:20:13,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907703129] [2021-11-07 01:20:13,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:13,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:13,083 INFO L87 Difference]: Start difference. First operand 43337 states and 78127 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:14,917 INFO L93 Difference]: Finished difference Result 86791 states and 156449 transitions. [2021-11-07 01:20:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:20:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:14,988 INFO L225 Difference]: With dead ends: 86791 [2021-11-07 01:20:14,988 INFO L226 Difference]: Without dead ends: 43752 [2021-11-07 01:20:15,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 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 01:20:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43752 states. [2021-11-07 01:20:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43752 to 43337. [2021-11-07 01:20:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43337 states, 43331 states have (on average 1.8000738501303917) internal successors, (77999), 43336 states have internal predecessors, (77999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43337 states to 43337 states and 77999 transitions. [2021-11-07 01:20:17,497 INFO L78 Accepts]: Start accepts. Automaton has 43337 states and 77999 transitions. Word has length 70 [2021-11-07 01:20:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:17,497 INFO L470 AbstractCegarLoop]: Abstraction has 43337 states and 77999 transitions. [2021-11-07 01:20:17,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 43337 states and 77999 transitions. [2021-11-07 01:20:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:20:17,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:17,505 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:17,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:17,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:17,719 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:20:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1502231650, now seen corresponding path program 1 times [2021-11-07 01:20:17,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:17,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002857692] [2021-11-07 01:20:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:17,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:17,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:17,721 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:17,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8d365b-5481-4ea4-953e-8458586d83b4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:20:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:18,572 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 01:20:18,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:18,740 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 01:20:18,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:18,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002857692] [2021-11-07 01:20:18,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002857692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:18,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:18,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:20:18,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051836999] [2021-11-07 01:20:18,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:18,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:18,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:18,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:18,743 INFO L87 Difference]: Start difference. First operand 43337 states and 77999 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 01:20:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:22,120 INFO L93 Difference]: Finished difference Result 121521 states and 218475 transitions. [2021-11-07 01:20:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:22,121 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 01:20:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:22,249 INFO L225 Difference]: With dead ends: 121521 [2021-11-07 01:20:22,249 INFO L226 Difference]: Without dead ends: 78442 [2021-11-07 01:20:22,274 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 01:20:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78442 states.