./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product33.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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 78f09f881cef26d11456f7baabcb58a727aa2f4d67cef56365b42a1e169c7203 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:47,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:47,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:47,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:47,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:47,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:47,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:47,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:47,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:47,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:47,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:47,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:47,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:47,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:47,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:47,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:47,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:47,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:47,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:47,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:47,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:47,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:47,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:47,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:47,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:47,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:47,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:47,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:47,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:47,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:47,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:47,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:47,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:47,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:47,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:47,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:47,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:47,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:47,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:47,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:47,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:47,375 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:30:47,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:47,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:47,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:47,414 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:47,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:47,414 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:47,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:30:47,415 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:47,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:47,415 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:30:47,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:30:47,416 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:47,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:30:47,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:30:47,417 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:30:47,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:47,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:47,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:30:47,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:47,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:47,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:47,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:47,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:47,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:47,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:47,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:47,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:47,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:47,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:47,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:47,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:47,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:47,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:47,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:47,422 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:30:47,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:30:47,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:47,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:47,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:47,423 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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78f09f881cef26d11456f7baabcb58a727aa2f4d67cef56365b42a1e169c7203 [2021-11-07 01:30:47,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:47,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:47,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:47,676 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:47,677 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:47,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product33.cil.c [2021-11-07 01:30:47,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/38bad51a0/8a53a69aa50e407ea8149eb2855c4f79/FLAG26256ece6 [2021-11-07 01:30:48,419 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:48,421 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/sv-benchmarks/c/product-lines/email_spec3_product33.cil.c [2021-11-07 01:30:48,458 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/38bad51a0/8a53a69aa50e407ea8149eb2855c4f79/FLAG26256ece6 [2021-11-07 01:30:48,598 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/38bad51a0/8a53a69aa50e407ea8149eb2855c4f79 [2021-11-07 01:30:48,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:48,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:48,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:48,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:48,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:48,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:48" (1/1) ... [2021-11-07 01:30:48,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d2bf407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:48, skipping insertion in model container [2021-11-07 01:30:48,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:48" (1/1) ... [2021-11-07 01:30:48,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:48,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:49,267 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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/sv-benchmarks/c/product-lines/email_spec3_product33.cil.c[65706,65719] [2021-11-07 01:30:49,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:49,282 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 01:30:49,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@420aa15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:49, skipping insertion in model container [2021-11-07 01:30:49,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:49,284 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:30:49,286 INFO L168 Benchmark]: Toolchain (without parser) took 681.18 ms. Allocated memory is still 100.7 MB. Free memory was 64.8 MB in the beginning and 61.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:49,287 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory was 54.7 MB in the beginning and 54.7 MB in the end (delta: 44.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:49,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 678.60 ms. Allocated memory is still 100.7 MB. Free memory was 64.6 MB in the beginning and 61.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:49,290 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory was 54.7 MB in the beginning and 54.7 MB in the end (delta: 44.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 678.60 ms. Allocated memory is still 100.7 MB. Free memory was 64.6 MB in the beginning and 61.3 MB in the end (delta: 3.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2060]: 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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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 78f09f881cef26d11456f7baabcb58a727aa2f4d67cef56365b42a1e169c7203 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:51,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:51,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:51,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:51,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:51,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:51,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:51,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:51,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:51,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:51,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:51,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:51,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:51,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:51,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:51,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:51,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:51,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:51,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:51,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:51,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:51,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:51,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:51,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:51,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:51,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:51,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:51,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:51,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:51,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:51,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:51,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:51,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:51,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:51,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:51,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:51,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:51,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:51,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:51,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:51,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:51,578 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:30:51,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:51,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:51,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:51,605 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:51,605 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:51,605 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:51,605 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:51,606 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:51,606 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:51,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:51,607 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:51,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:51,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:51,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:51,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:51,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:51,608 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:51,608 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:30:51,608 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:30:51,608 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:51,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:51,609 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:51,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:51,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:51,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:30:51,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:51,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:51,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:51,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:51,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:51,610 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:30:51,611 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:30:51,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:51,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:51,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:51,611 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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78f09f881cef26d11456f7baabcb58a727aa2f4d67cef56365b42a1e169c7203 [2021-11-07 01:30:51,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:52,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:52,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:52,014 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:52,015 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:52,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product33.cil.c [2021-11-07 01:30:52,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/2e4e2e4c1/09c97bd8480846808b2a244947622d96/FLAG25f7ab6f8 [2021-11-07 01:30:52,831 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:52,831 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/sv-benchmarks/c/product-lines/email_spec3_product33.cil.c [2021-11-07 01:30:52,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/2e4e2e4c1/09c97bd8480846808b2a244947622d96/FLAG25f7ab6f8 [2021-11-07 01:30:52,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/data/2e4e2e4c1/09c97bd8480846808b2a244947622d96 [2021-11-07 01:30:52,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:52,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:52,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:52,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:52,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:52,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:52" (1/1) ... [2021-11-07 01:30:52,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b0176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:52, skipping insertion in model container [2021-11-07 01:30:52,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:52" (1/1) ... [2021-11-07 01:30:52,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:53,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:53,756 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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/sv-benchmarks/c/product-lines/email_spec3_product33.cil.c[65706,65719] [2021-11-07 01:30:53,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:53,778 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:30:53,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:53,937 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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/sv-benchmarks/c/product-lines/email_spec3_product33.cil.c[65706,65719] [2021-11-07 01:30:53,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:53,947 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:30:54,071 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_f6ddd280-eba7-4b45-9c7d-eb849441d83e/sv-benchmarks/c/product-lines/email_spec3_product33.cil.c[65706,65719] [2021-11-07 01:30:54,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:54,113 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:30:54,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54 WrapperNode [2021-11-07 01:30:54,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:54,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:54,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:30:54,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:30:54,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:54,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:30:54,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:30:54,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:30:54,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:30:54,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:30:54,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:30:54,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:30:54,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (1/1) ... [2021-11-07 01:30:54,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:54,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:30:54,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:30:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:30:54,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:30:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:30:54,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:30:54,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:30:59,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:30:59,368 INFO L299 CfgBuilder]: Removed 423 assume(true) statements. [2021-11-07 01:30:59,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:59 BoogieIcfgContainer [2021-11-07 01:30:59,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:30:59,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:30:59,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:30:59,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:30:59,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:52" (1/3) ... [2021-11-07 01:30:59,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df5f941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:59, skipping insertion in model container [2021-11-07 01:30:59,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:54" (2/3) ... [2021-11-07 01:30:59,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df5f941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:59, skipping insertion in model container [2021-11-07 01:30:59,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:59" (3/3) ... [2021-11-07 01:30:59,383 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product33.cil.c [2021-11-07 01:30:59,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:30:59,389 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 01:30:59,444 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:30:59,450 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 01:30:59,450 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 01:30:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 633 states, 628 states have (on average 1.7372611464968153) internal successors, (1091), 632 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:30:59,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:59,504 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:59,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:30:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1449761986, now seen corresponding path program 1 times [2021-11-07 01:30:59,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:59,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435184545] [2021-11-07 01:30:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:59,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:59,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:59,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:59,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:30:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:59,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:30:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:00,230 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 01:31:00,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:00,389 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 01:31:00,390 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:00,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435184545] [2021-11-07 01:31:00,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435184545] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:00,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:00,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:31:00,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112339831] [2021-11-07 01:31:00,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:31:00,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:31:00,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:31:00,420 INFO L87 Difference]: Start difference. First operand has 633 states, 628 states have (on average 1.7372611464968153) internal successors, (1091), 632 states have internal predecessors, (1091), 0 states have call successors, (0), 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 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:00,503 INFO L93 Difference]: Finished difference Result 1020 states and 1734 transitions. [2021-11-07 01:31:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:31:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:31:00,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:00,529 INFO L225 Difference]: With dead ends: 1020 [2021-11-07 01:31:00,529 INFO L226 Difference]: Without dead ends: 537 [2021-11-07 01:31:00,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 112 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 01:31:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-07 01:31:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2021-11-07 01:31:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 533 states have (on average 1.7392120075046904) internal successors, (927), 536 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 927 transitions. [2021-11-07 01:31:00,635 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 927 transitions. Word has length 57 [2021-11-07 01:31:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:00,635 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 927 transitions. [2021-11-07 01:31:00,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 927 transitions. [2021-11-07 01:31:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:31:00,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:00,642 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:00,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:00,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:00,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1327563855, now seen corresponding path program 1 times [2021-11-07 01:31:00,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:00,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231824569] [2021-11-07 01:31:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:00,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:00,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:00,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:00,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:31:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:31:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:01,401 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 01:31:01,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:01,581 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 01:31:01,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:01,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231824569] [2021-11-07 01:31:01,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231824569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:01,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:01,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:01,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895782306] [2021-11-07 01:31:01,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:01,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:01,589 INFO L87 Difference]: Start difference. First operand 537 states and 927 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:01,725 INFO L93 Difference]: Finished difference Result 1581 states and 2733 transitions. [2021-11-07 01:31:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:31:01,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:31:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:01,733 INFO L225 Difference]: With dead ends: 1581 [2021-11-07 01:31:01,734 INFO L226 Difference]: Without dead ends: 1059 [2021-11-07 01:31:01,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-11-07 01:31:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 536. [2021-11-07 01:31:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 532 states have (on average 1.7330827067669172) internal successors, (922), 535 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 922 transitions. [2021-11-07 01:31:01,777 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 922 transitions. Word has length 58 [2021-11-07 01:31:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:01,778 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 922 transitions. [2021-11-07 01:31:01,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 922 transitions. [2021-11-07 01:31:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:31:01,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:01,787 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] [2021-11-07 01:31:01,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:02,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:02,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2099328245, now seen corresponding path program 1 times [2021-11-07 01:31:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:02,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29439327] [2021-11-07 01:31:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:02,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:02,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:02,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:02,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:31:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:02,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:31:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:02,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:02,759 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 01:31:02,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:02,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29439327] [2021-11-07 01:31:02,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29439327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:02,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:02,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:31:02,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673866136] [2021-11-07 01:31:02,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:02,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:31:02,762 INFO L87 Difference]: Start difference. First operand 536 states and 922 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 01:31:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:03,020 INFO L93 Difference]: Finished difference Result 2061 states and 3550 transitions. [2021-11-07 01:31:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:31:03,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 60 [2021-11-07 01:31:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:03,032 INFO L225 Difference]: With dead ends: 2061 [2021-11-07 01:31:03,033 INFO L226 Difference]: Without dead ends: 1543 [2021-11-07 01:31:03,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 01:31:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-11-07 01:31:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 535. [2021-11-07 01:31:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 531 states have (on average 1.728813559322034) internal successors, (918), 534 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 918 transitions. [2021-11-07 01:31:03,076 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 918 transitions. Word has length 60 [2021-11-07 01:31:03,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:03,077 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 918 transitions. [2021-11-07 01:31:03,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 01:31:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 918 transitions. [2021-11-07 01:31:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:31:03,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:03,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:03,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:03,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:03,294 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash 286813400, now seen corresponding path program 1 times [2021-11-07 01:31:03,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:03,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821061442] [2021-11-07 01:31:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:03,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:03,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:03,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:31:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:31:03,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:03,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:04,112 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 01:31:04,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:04,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821061442] [2021-11-07 01:31:04,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821061442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:04,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:04,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:04,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104525727] [2021-11-07 01:31:04,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:04,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:04,115 INFO L87 Difference]: Start difference. First operand 535 states and 918 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 01:31:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:04,208 INFO L93 Difference]: Finished difference Result 1067 states and 1833 transitions. [2021-11-07 01:31:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:31:04,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:31:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:04,212 INFO L225 Difference]: With dead ends: 1067 [2021-11-07 01:31:04,212 INFO L226 Difference]: Without dead ends: 540 [2021-11-07 01:31:04,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 01:31:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-07 01:31:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 535. [2021-11-07 01:31:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 531 states have (on average 1.7231638418079096) internal successors, (915), 534 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 915 transitions. [2021-11-07 01:31:04,252 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 915 transitions. Word has length 61 [2021-11-07 01:31:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:04,253 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 915 transitions. [2021-11-07 01:31:04,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 01:31:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 915 transitions. [2021-11-07 01:31:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:31:04,256 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:04,256 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 01:31:04,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:31:04,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:04,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1232005853, now seen corresponding path program 1 times [2021-11-07 01:31:04,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:04,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459521532] [2021-11-07 01:31:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:04,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:04,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:04,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:04,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:31:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:31:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:05,148 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 01:31:05,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:05,332 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 01:31:05,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:05,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459521532] [2021-11-07 01:31:05,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459521532] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:05,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:05,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:31:05,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810607730] [2021-11-07 01:31:05,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:05,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:05,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:31:05,335 INFO L87 Difference]: Start difference. First operand 535 states and 915 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 01:31:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:05,613 INFO L93 Difference]: Finished difference Result 2048 states and 3526 transitions. [2021-11-07 01:31:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:31:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 62 [2021-11-07 01:31:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:05,624 INFO L225 Difference]: With dead ends: 2048 [2021-11-07 01:31:05,624 INFO L226 Difference]: Without dead ends: 1539 [2021-11-07 01:31:05,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 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 01:31:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-11-07 01:31:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 535. [2021-11-07 01:31:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 531 states have (on average 1.7175141242937852) internal successors, (912), 534 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 912 transitions. [2021-11-07 01:31:05,676 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 912 transitions. Word has length 62 [2021-11-07 01:31:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:05,676 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 912 transitions. [2021-11-07 01:31:05,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 01:31:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 912 transitions. [2021-11-07 01:31:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:31:05,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:05,678 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 01:31:05,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:05,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:05,896 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash 465170056, now seen corresponding path program 1 times [2021-11-07 01:31:05,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:05,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673358684] [2021-11-07 01:31:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:05,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:05,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:05,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:31:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:06,493 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 01:31:06,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:06,663 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 01:31:06,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:06,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673358684] [2021-11-07 01:31:06,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673358684] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:06,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:06,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:06,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600228483] [2021-11-07 01:31:06,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:06,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:06,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:06,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:06,665 INFO L87 Difference]: Start difference. First operand 535 states and 912 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:06,777 INFO L93 Difference]: Finished difference Result 1335 states and 2276 transitions. [2021-11-07 01:31:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:31:06,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:31:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:06,784 INFO L225 Difference]: With dead ends: 1335 [2021-11-07 01:31:06,785 INFO L226 Difference]: Without dead ends: 1044 [2021-11-07 01:31:06,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 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 01:31:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-07 01:31:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 753. [2021-11-07 01:31:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 749 states have (on average 1.7489986648865155) internal successors, (1310), 752 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1310 transitions. [2021-11-07 01:31:06,847 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1310 transitions. Word has length 64 [2021-11-07 01:31:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:06,848 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1310 transitions. [2021-11-07 01:31:06,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1310 transitions. [2021-11-07 01:31:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:31:06,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:06,850 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:06,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:07,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:07,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1495402807, now seen corresponding path program 1 times [2021-11-07 01:31:07,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:07,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73621844] [2021-11-07 01:31:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:07,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:07,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:07,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:07,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:31:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:07,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:07,745 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 01:31:07,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:07,942 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 01:31:07,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:07,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73621844] [2021-11-07 01:31:07,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73621844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:07,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:07,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:07,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077652230] [2021-11-07 01:31:07,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:07,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:07,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:07,945 INFO L87 Difference]: Start difference. First operand 753 states and 1310 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:08,059 INFO L93 Difference]: Finished difference Result 1879 states and 3271 transitions. [2021-11-07 01:31:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:08,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:31:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:08,068 INFO L225 Difference]: With dead ends: 1879 [2021-11-07 01:31:08,068 INFO L226 Difference]: Without dead ends: 1210 [2021-11-07 01:31:08,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-11-07 01:31:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 919. [2021-11-07 01:31:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 915 states have (on average 1.7606557377049181) internal successors, (1611), 918 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1611 transitions. [2021-11-07 01:31:08,150 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1611 transitions. Word has length 76 [2021-11-07 01:31:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:08,150 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1611 transitions. [2021-11-07 01:31:08,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1611 transitions. [2021-11-07 01:31:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:31:08,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:08,153 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:08,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:31:08,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:08,369 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2073325496, now seen corresponding path program 1 times [2021-11-07 01:31:08,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:08,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545942254] [2021-11-07 01:31:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:08,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:08,371 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:08,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:31:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:08,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:09,145 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 01:31:09,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:09,339 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 01:31:09,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:09,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545942254] [2021-11-07 01:31:09,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545942254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:09,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:09,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:09,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748286348] [2021-11-07 01:31:09,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:09,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:09,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:09,345 INFO L87 Difference]: Start difference. First operand 919 states and 1611 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:09,475 INFO L93 Difference]: Finished difference Result 2409 states and 4239 transitions. [2021-11-07 01:31:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:09,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:31:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:09,485 INFO L225 Difference]: With dead ends: 2409 [2021-11-07 01:31:09,486 INFO L226 Difference]: Without dead ends: 1582 [2021-11-07 01:31:09,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-11-07 01:31:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1291. [2021-11-07 01:31:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1287 states have (on average 1.7785547785547786) internal successors, (2289), 1290 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 2289 transitions. [2021-11-07 01:31:09,619 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 2289 transitions. Word has length 77 [2021-11-07 01:31:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:09,619 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 2289 transitions. [2021-11-07 01:31:09,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 2289 transitions. [2021-11-07 01:31:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:31:09,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:09,625 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:09,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:09,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:09,840 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash 321591241, now seen corresponding path program 1 times [2021-11-07 01:31:09,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:09,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31713491] [2021-11-07 01:31:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:09,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:09,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:09,842 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:09,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:31:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:10,585 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 01:31:10,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:10,777 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 01:31:10,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:10,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31713491] [2021-11-07 01:31:10,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31713491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:10,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:10,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:10,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607341497] [2021-11-07 01:31:10,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:10,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:10,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:10,779 INFO L87 Difference]: Start difference. First operand 1291 states and 2289 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:10,945 INFO L93 Difference]: Finished difference Result 3505 states and 6242 transitions. [2021-11-07 01:31:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:31:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:10,960 INFO L225 Difference]: With dead ends: 3505 [2021-11-07 01:31:10,960 INFO L226 Difference]: Without dead ends: 2314 [2021-11-07 01:31:10,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-11-07 01:31:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2023. [2021-11-07 01:31:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2019 states have (on average 1.7949479940564637) internal successors, (3624), 2022 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3624 transitions. [2021-11-07 01:31:11,128 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3624 transitions. Word has length 78 [2021-11-07 01:31:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:11,128 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 3624 transitions. [2021-11-07 01:31:11,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3624 transitions. [2021-11-07 01:31:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:31:11,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:11,133 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:11,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:11,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:11,358 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1777817015, now seen corresponding path program 1 times [2021-11-07 01:31:11,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:11,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467766115] [2021-11-07 01:31:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:11,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:11,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:11,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:11,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:31:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:12,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:12,226 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 01:31:12,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:12,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467766115] [2021-11-07 01:31:12,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467766115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:12,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:12,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:12,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563394816] [2021-11-07 01:31:12,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:12,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:12,228 INFO L87 Difference]: Start difference. First operand 2023 states and 3624 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:12,478 INFO L93 Difference]: Finished difference Result 5437 states and 9766 transitions. [2021-11-07 01:31:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:31:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:12,500 INFO L225 Difference]: With dead ends: 5437 [2021-11-07 01:31:12,500 INFO L226 Difference]: Without dead ends: 3548 [2021-11-07 01:31:12,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-11-07 01:31:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3257. [2021-11-07 01:31:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3253 states have (on average 1.8041807562250232) internal successors, (5869), 3256 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 5869 transitions. [2021-11-07 01:31:12,773 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 5869 transitions. Word has length 79 [2021-11-07 01:31:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:12,774 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 5869 transitions. [2021-11-07 01:31:12,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 5869 transitions. [2021-11-07 01:31:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:31:12,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:12,780 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:12,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:13,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:13,002 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1859330760, now seen corresponding path program 1 times [2021-11-07 01:31:13,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:13,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314703729] [2021-11-07 01:31:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:13,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:13,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:13,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:13,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:31:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:13,783 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 01:31:13,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:13,956 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 01:31:13,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:13,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314703729] [2021-11-07 01:31:13,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314703729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:13,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:13,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:13,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715032900] [2021-11-07 01:31:13,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:13,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:13,959 INFO L87 Difference]: Start difference. First operand 3257 states and 5869 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:14,332 INFO L93 Difference]: Finished difference Result 8855 states and 15984 transitions. [2021-11-07 01:31:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-07 01:31:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:14,368 INFO L225 Difference]: With dead ends: 8855 [2021-11-07 01:31:14,368 INFO L226 Difference]: Without dead ends: 5766 [2021-11-07 01:31:14,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 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 01:31:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-11-07 01:31:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5475. [2021-11-07 01:31:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5471 states have (on average 1.8084445256808628) internal successors, (9894), 5474 states have internal predecessors, (9894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 9894 transitions. [2021-11-07 01:31:14,754 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 9894 transitions. Word has length 80 [2021-11-07 01:31:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:14,755 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 9894 transitions. [2021-11-07 01:31:14,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:14,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 9894 transitions. [2021-11-07 01:31:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:31:14,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:14,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:14,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:14,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:14,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1928494296, now seen corresponding path program 1 times [2021-11-07 01:31:14,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:14,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799344449] [2021-11-07 01:31:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:14,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:14,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:14,985 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:14,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:31:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:15,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:15,713 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 01:31:15,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:15,895 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 01:31:15,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:15,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799344449] [2021-11-07 01:31:15,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799344449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:15,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:15,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:15,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463247402] [2021-11-07 01:31:15,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:15,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:15,897 INFO L87 Difference]: Start difference. First operand 5475 states and 9894 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:16,448 INFO L93 Difference]: Finished difference Result 15835 states and 28670 transitions. [2021-11-07 01:31:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:31:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:16,492 INFO L225 Difference]: With dead ends: 15835 [2021-11-07 01:31:16,492 INFO L226 Difference]: Without dead ends: 10536 [2021-11-07 01:31:16,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 01:31:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-11-07 01:31:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 10245. [2021-11-07 01:31:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10241 states have (on average 1.8114441949028415) internal successors, (18551), 10244 states have internal predecessors, (18551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 18551 transitions. [2021-11-07 01:31:17,140 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 18551 transitions. Word has length 81 [2021-11-07 01:31:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:17,141 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 18551 transitions. [2021-11-07 01:31:17,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 18551 transitions. [2021-11-07 01:31:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:31:17,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:17,153 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:17,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:31:17,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:17,368 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1428556776, now seen corresponding path program 1 times [2021-11-07 01:31:17,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:17,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999359335] [2021-11-07 01:31:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:17,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:17,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:17,371 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:17,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:31:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:31:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:18,214 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 01:31:18,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:18,504 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 01:31:18,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:18,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999359335] [2021-11-07 01:31:18,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999359335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:18,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:18,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:31:18,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622221774] [2021-11-07 01:31:18,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:18,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:31:18,507 INFO L87 Difference]: Start difference. First operand 10245 states and 18551 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:21,383 INFO L93 Difference]: Finished difference Result 25294 states and 45806 transitions. [2021-11-07 01:31:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:31:21,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:31:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:21,427 INFO L225 Difference]: With dead ends: 25294 [2021-11-07 01:31:21,427 INFO L226 Difference]: Without dead ends: 15303 [2021-11-07 01:31:21,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 01:31:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15303 states. [2021-11-07 01:31:22,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15303 to 10212. [2021-11-07 01:31:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10212 states, 10208 states have (on average 1.8043691222570533) internal successors, (18419), 10211 states have internal predecessors, (18419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10212 states to 10212 states and 18419 transitions. [2021-11-07 01:31:22,225 INFO L78 Accepts]: Start accepts. Automaton has 10212 states and 18419 transitions. Word has length 82 [2021-11-07 01:31:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:22,225 INFO L470 AbstractCegarLoop]: Abstraction has 10212 states and 18419 transitions. [2021-11-07 01:31:22,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 10212 states and 18419 transitions. [2021-11-07 01:31:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:31:22,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:22,242 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:22,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:31:22,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:22,458 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:22,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1812690263, now seen corresponding path program 1 times [2021-11-07 01:31:22,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:22,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125985048] [2021-11-07 01:31:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:22,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:22,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:22,460 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:22,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:31:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:23,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:23,335 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 01:31:23,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:23,541 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 01:31:23,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:23,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125985048] [2021-11-07 01:31:23,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125985048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:23,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:23,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:23,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314350559] [2021-11-07 01:31:23,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:23,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:23,544 INFO L87 Difference]: Start difference. First operand 10212 states and 18419 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:24,703 INFO L93 Difference]: Finished difference Result 29878 states and 53952 transitions. [2021-11-07 01:31:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:31:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:24,756 INFO L225 Difference]: With dead ends: 29878 [2021-11-07 01:31:24,757 INFO L226 Difference]: Without dead ends: 19849 [2021-11-07 01:31:24,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 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 01:31:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19849 states. [2021-11-07 01:31:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19849 to 19558. [2021-11-07 01:31:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19558 states, 19554 states have (on average 1.804438989465071) internal successors, (35284), 19557 states have internal predecessors, (35284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19558 states to 19558 states and 35284 transitions. [2021-11-07 01:31:25,867 INFO L78 Accepts]: Start accepts. Automaton has 19558 states and 35284 transitions. Word has length 82 [2021-11-07 01:31:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:25,868 INFO L470 AbstractCegarLoop]: Abstraction has 19558 states and 35284 transitions. [2021-11-07 01:31:25,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19558 states and 35284 transitions. [2021-11-07 01:31:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:31:25,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:25,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:25,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:26,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:26,098 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:26,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2032447511, now seen corresponding path program 1 times [2021-11-07 01:31:26,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:26,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137822697] [2021-11-07 01:31:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:26,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:26,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:26,100 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:26,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:31:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:27,108 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 01:31:27,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:27,320 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 01:31:27,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:27,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137822697] [2021-11-07 01:31:27,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137822697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:27,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:27,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:27,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461955214] [2021-11-07 01:31:27,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:27,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:27,322 INFO L87 Difference]: Start difference. First operand 19558 states and 35284 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:28,801 INFO L93 Difference]: Finished difference Result 58102 states and 104861 transitions. [2021-11-07 01:31:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:28,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:31:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:28,899 INFO L225 Difference]: With dead ends: 58102 [2021-11-07 01:31:28,900 INFO L226 Difference]: Without dead ends: 38731 [2021-11-07 01:31:28,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 01:31:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38731 states. [2021-11-07 01:31:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38731 to 38440. [2021-11-07 01:31:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38440 states, 38436 states have (on average 1.8021906545946509) internal successors, (69269), 38439 states have internal predecessors, (69269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38440 states to 38440 states and 69269 transitions. [2021-11-07 01:31:30,852 INFO L78 Accepts]: Start accepts. Automaton has 38440 states and 69269 transitions. Word has length 83 [2021-11-07 01:31:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:30,852 INFO L470 AbstractCegarLoop]: Abstraction has 38440 states and 69269 transitions. [2021-11-07 01:31:30,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 38440 states and 69269 transitions. [2021-11-07 01:31:30,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:31:30,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:30,871 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:30,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:31,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:31,087 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:31,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1681409250, now seen corresponding path program 1 times [2021-11-07 01:31:31,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:31,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913620809] [2021-11-07 01:31:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:31,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:31,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:31,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:31,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:31:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:31,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:31:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:32,039 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 01:31:32,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:32,505 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 01:31:32,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:32,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913620809] [2021-11-07 01:31:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913620809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:32,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:32,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:31:32,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651860019] [2021-11-07 01:31:32,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:32,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:31:32,507 INFO L87 Difference]: Start difference. First operand 38440 states and 69269 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:39,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:39,113 INFO L93 Difference]: Finished difference Result 149157 states and 268623 transitions. [2021-11-07 01:31:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:31:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 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 84 [2021-11-07 01:31:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:39,434 INFO L225 Difference]: With dead ends: 149157 [2021-11-07 01:31:39,434 INFO L226 Difference]: Without dead ends: 110970 [2021-11-07 01:31:39,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 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 01:31:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110970 states. [2021-11-07 01:31:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110970 to 38182. [2021-11-07 01:31:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38182 states, 38178 states have (on average 1.7873382576352874) internal successors, (68237), 38181 states have internal predecessors, (68237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38182 states to 38182 states and 68237 transitions. [2021-11-07 01:31:42,213 INFO L78 Accepts]: Start accepts. Automaton has 38182 states and 68237 transitions. Word has length 84 [2021-11-07 01:31:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:42,214 INFO L470 AbstractCegarLoop]: Abstraction has 38182 states and 68237 transitions. [2021-11-07 01:31:42,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 38182 states and 68237 transitions. [2021-11-07 01:31:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:31:42,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:42,232 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:42,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:42,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:42,448 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1290379004, now seen corresponding path program 1 times [2021-11-07 01:31:42,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:42,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366392902] [2021-11-07 01:31:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:42,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:42,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:42,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:31:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:43,382 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 01:31:43,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:43,585 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 01:31:43,585 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:43,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366392902] [2021-11-07 01:31:43,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366392902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:43,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:43,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:43,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868061969] [2021-11-07 01:31:43,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:43,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:43,592 INFO L87 Difference]: Start difference. First operand 38182 states and 68237 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:45,650 INFO L93 Difference]: Finished difference Result 76396 states and 136529 transitions. [2021-11-07 01:31:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:45,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:31:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:45,715 INFO L225 Difference]: With dead ends: 76396 [2021-11-07 01:31:45,716 INFO L226 Difference]: Without dead ends: 38473 [2021-11-07 01:31:45,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 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 01:31:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38473 states. [2021-11-07 01:31:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38473 to 38182. [2021-11-07 01:31:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38182 states, 38178 states have (on average 1.783985541411284) internal successors, (68109), 38181 states have internal predecessors, (68109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38182 states to 38182 states and 68109 transitions. [2021-11-07 01:31:47,708 INFO L78 Accepts]: Start accepts. Automaton has 38182 states and 68109 transitions. Word has length 84 [2021-11-07 01:31:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:47,709 INFO L470 AbstractCegarLoop]: Abstraction has 38182 states and 68109 transitions. [2021-11-07 01:31:47,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 38182 states and 68109 transitions. [2021-11-07 01:31:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:31:47,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:47,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:47,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:47,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:47,946 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1900224759, now seen corresponding path program 1 times [2021-11-07 01:31:47,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:47,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737255652] [2021-11-07 01:31:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:47,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:47,948 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:31:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:48,949 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 01:31:48,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:49,140 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 01:31:49,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:49,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737255652] [2021-11-07 01:31:49,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737255652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:49,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:49,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:49,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999373350] [2021-11-07 01:31:49,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:49,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:49,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:49,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:49,143 INFO L87 Difference]: Start difference. First operand 38182 states and 68109 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:51,926 INFO L93 Difference]: Finished difference Result 106134 states and 188955 transitions. [2021-11-07 01:31:51,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:51,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:31:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:52,025 INFO L225 Difference]: With dead ends: 106134 [2021-11-07 01:31:52,025 INFO L226 Difference]: Without dead ends: 68171 [2021-11-07 01:31:52,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 01:31:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68171 states. [2021-11-07 01:31:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68171 to 67880. [2021-11-07 01:31:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67880 states, 67876 states have (on average 1.7747362838116565) internal successors, (120462), 67879 states have internal predecessors, (120462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67880 states to 67880 states and 120462 transitions. [2021-11-07 01:31:55,974 INFO L78 Accepts]: Start accepts. Automaton has 67880 states and 120462 transitions. Word has length 84 [2021-11-07 01:31:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:55,974 INFO L470 AbstractCegarLoop]: Abstraction has 67880 states and 120462 transitions. [2021-11-07 01:31:55,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 67880 states and 120462 transitions. [2021-11-07 01:31:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:31:55,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:55,990 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:56,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:56,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:56,192 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:31:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1603767810, now seen corresponding path program 1 times [2021-11-07 01:31:56,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:56,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606965590] [2021-11-07 01:31:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:56,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:56,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:56,194 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:56,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:31:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:31:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:57,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:31:57,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:57,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606965590] [2021-11-07 01:31:57,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606965590] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:31:57,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1895074394] [2021-11-07 01:31:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:57,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:31:57,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:31:57,681 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:31:57,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ddd280-eba7-4b45-9c7d-eb849441d83e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:31:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:31:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:31:59,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:31:59,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1895074394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:59,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:31:59,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:31:59,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242872436] [2021-11-07 01:31:59,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:31:59,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:59,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:31:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:31:59,400 INFO L87 Difference]: Start difference. First operand 67880 states and 120462 transitions. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)