./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product16.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_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/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_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/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_b86c2443-a582-434c-86df-e77c19fceaa6/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 5ce5fd5bda0c8594f52541a2ff1031f1544bc9165bf7645718c7801e066263fc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:22:12,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:22:12,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:22:12,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:22:12,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:22:12,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:22:12,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:22:12,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:22:12,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:22:12,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:22:12,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:22:12,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:22:12,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:22:12,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:22:12,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:22:12,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:22:12,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:22:12,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:22:12,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:22:12,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:22:12,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:22:12,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:22:12,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:22:12,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:22:12,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:22:12,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:22:12,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:22:12,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:22:12,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:22:12,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:22:12,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:22:12,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:22:12,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:22:12,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:22:12,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:22:12,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:22:12,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:22:12,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:22:12,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:22:12,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:22:12,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:22:12,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:22:12,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:22:12,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:22:12,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:22:12,359 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:22:12,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:22:12,360 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:22:12,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:22:12,360 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:22:12,360 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:22:12,361 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:22:12,368 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:22:12,368 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:22:12,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:22:12,369 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:22:12,369 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:22:12,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:22:12,370 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:22:12,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:22:12,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:22:12,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:22:12,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:22:12,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:22:12,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:22:12,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:22:12,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:22:12,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:22:12,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:22:12,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:22:12,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:22:12,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:22:12,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:12,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:22:12,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:22:12,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:22:12,377 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:22:12,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:22:12,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:22:12,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:22:12,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:22:12,378 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_b86c2443-a582-434c-86df-e77c19fceaa6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ce5fd5bda0c8594f52541a2ff1031f1544bc9165bf7645718c7801e066263fc [2021-11-07 02:22:12,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:22:12,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:22:12,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:22:12,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:22:12,696 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:22:12,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product16.cil.c [2021-11-07 02:22:12,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/cd7bea28d/21beba5a2732497fb37dd3a6a083440d/FLAG73dec3f9a [2021-11-07 02:22:13,421 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:22:13,421 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c [2021-11-07 02:22:13,448 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/cd7bea28d/21beba5a2732497fb37dd3a6a083440d/FLAG73dec3f9a [2021-11-07 02:22:13,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/cd7bea28d/21beba5a2732497fb37dd3a6a083440d [2021-11-07 02:22:13,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:22:13,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:22:13,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:13,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:22:13,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:22:13,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:13" (1/1) ... [2021-11-07 02:22:13,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e85f690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:13, skipping insertion in model container [2021-11-07 02:22:13,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:13" (1/1) ... [2021-11-07 02:22:13,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:22:13,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:14,075 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_b86c2443-a582-434c-86df-e77c19fceaa6/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c[7449,7462] [2021-11-07 02:22:14,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:14,394 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:22:14,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e4a96f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:14, skipping insertion in model container [2021-11-07 02:22:14,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:14,395 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:22:14,397 INFO L168 Benchmark]: Toolchain (without parser) took 769.99 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 46.4 MB in the beginning and 66.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:22:14,398 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 38.4 MB in the beginning and 38.4 MB in the end (delta: 38.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:22:14,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 759.48 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 46.3 MB in the beginning and 66.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:22:14,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory was 38.4 MB in the beginning and 38.4 MB in the end (delta: 38.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 759.48 ms. Allocated memory was 81.8 MB in the beginning and 102.8 MB in the end (delta: 21.0 MB). Free memory was 46.3 MB in the beginning and 66.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 764]: 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_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/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_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product16.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/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_b86c2443-a582-434c-86df-e77c19fceaa6/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 5ce5fd5bda0c8594f52541a2ff1031f1544bc9165bf7645718c7801e066263fc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:22:16,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:22:16,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:22:16,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:22:16,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:22:16,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:22:16,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:22:16,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:22:16,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:22:16,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:22:16,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:22:16,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:22:16,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:22:16,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:22:16,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:22:16,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:22:16,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:22:16,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:22:16,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:22:16,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:22:16,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:22:16,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:22:16,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:22:16,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:22:16,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:22:16,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:22:16,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:22:16,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:22:16,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:22:16,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:22:16,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:22:16,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:22:16,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:22:16,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:22:16,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:22:16,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:22:16,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:22:16,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:22:16,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:22:16,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:22:16,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:22:16,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:22:16,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:22:16,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:22:16,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:22:16,777 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:22:16,777 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:22:16,777 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:22:16,777 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:22:16,778 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:22:16,778 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:22:16,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:22:16,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:22:16,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:22:16,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:22:16,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:22:16,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:22:16,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:22:16,782 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:22:16,782 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:22:16,782 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:22:16,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:22:16,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:22:16,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:22:16,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:22:16,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:22:16,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:22:16,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:22:16,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:16,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:22:16,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:22:16,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:22:16,785 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:22:16,785 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:16,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:22:16,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:22:16,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:22:16,786 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_b86c2443-a582-434c-86df-e77c19fceaa6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ce5fd5bda0c8594f52541a2ff1031f1544bc9165bf7645718c7801e066263fc [2021-11-07 02:22:17,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:22:17,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:22:17,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:22:17,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:22:17,191 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:22:17,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product16.cil.c [2021-11-07 02:22:17,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/a16e47f8f/09deda6de2884c0ab6ecc35eb68ec908/FLAG53e06ce68 [2021-11-07 02:22:17,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:22:17,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c [2021-11-07 02:22:17,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/a16e47f8f/09deda6de2884c0ab6ecc35eb68ec908/FLAG53e06ce68 [2021-11-07 02:22:18,110 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/data/a16e47f8f/09deda6de2884c0ab6ecc35eb68ec908 [2021-11-07 02:22:18,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:22:18,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:22:18,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:18,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:22:18,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:22:18,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:18" (1/1) ... [2021-11-07 02:22:18,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7b3635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:18, skipping insertion in model container [2021-11-07 02:22:18,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:22:18" (1/1) ... [2021-11-07 02:22:18,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:22:18,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:18,608 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_b86c2443-a582-434c-86df-e77c19fceaa6/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c[7449,7462] [2021-11-07 02:22:18,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:18,870 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:22:18,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:22:18,904 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_b86c2443-a582-434c-86df-e77c19fceaa6/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c[7449,7462] [2021-11-07 02:22:19,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:19,057 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:22:19,096 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_b86c2443-a582-434c-86df-e77c19fceaa6/sv-benchmarks/c/product-lines/email_spec0_product16.cil.c[7449,7462] [2021-11-07 02:22:19,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:22:19,217 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:22:19,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19 WrapperNode [2021-11-07 02:22:19,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:22:19,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:22:19,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:22:19,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:22:19,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:22:19,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:22:19,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:22:19,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:22:19,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:22:19,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:22:19,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:22:19,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:22:19,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (1/1) ... [2021-11-07 02:22:19,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:22:19,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:22:19,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:22:19,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:22:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:22:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:22:19,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:22:19,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:22:19,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:22:23,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:22:23,702 INFO L299 CfgBuilder]: Removed 295 assume(true) statements. [2021-11-07 02:22:23,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:22:23 BoogieIcfgContainer [2021-11-07 02:22:23,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:22:23,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:22:23,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:22:23,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:22:23,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:22:18" (1/3) ... [2021-11-07 02:22:23,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdf4656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:22:23, skipping insertion in model container [2021-11-07 02:22:23,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:22:19" (2/3) ... [2021-11-07 02:22:23,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdf4656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:22:23, skipping insertion in model container [2021-11-07 02:22:23,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:22:23" (3/3) ... [2021-11-07 02:22:23,713 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product16.cil.c [2021-11-07 02:22:23,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:22:23,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:22:23,780 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:22:23,788 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:22:23,788 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:22:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 444 states have (on average 1.7432432432432432) internal successors, (774), 446 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:22:23,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:23,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:23,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:23,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2111077188, now seen corresponding path program 1 times [2021-11-07 02:22:23,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:23,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128929504] [2021-11-07 02:22:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:23,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:23,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:23,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:23,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:22:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:24,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:22:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:24,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:24,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:24,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128929504] [2021-11-07 02:22:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128929504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:24,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:24,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:22:24,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810285134] [2021-11-07 02:22:24,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:22:24,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:22:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:22:24,744 INFO L87 Difference]: Start difference. First operand has 447 states, 444 states have (on average 1.7432432432432432) internal successors, (774), 446 states have internal predecessors, (774), 0 states have call successors, (0), 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 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:24,819 INFO L93 Difference]: Finished difference Result 652 states and 1107 transitions. [2021-11-07 02:22:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:22:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:22:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:24,851 INFO L225 Difference]: With dead ends: 652 [2021-11-07 02:22:24,852 INFO L226 Difference]: Without dead ends: 419 [2021-11-07 02:22:24,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:22:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-07 02:22:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2021-11-07 02:22:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 417 states have (on average 1.7410071942446044) internal successors, (726), 418 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 726 transitions. [2021-11-07 02:22:24,940 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 726 transitions. Word has length 54 [2021-11-07 02:22:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 726 transitions. [2021-11-07 02:22:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 726 transitions. [2021-11-07 02:22:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:22:24,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:24,945 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:24,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:25,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,164 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:25,165 INFO L85 PathProgramCache]: Analyzing trace with hash 687402929, now seen corresponding path program 1 times [2021-11-07 02:22:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:25,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273876810] [2021-11-07 02:22:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:25,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:25,168 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:25,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:22:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:25,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:22:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:25,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:25,942 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 02:22:25,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:25,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273876810] [2021-11-07 02:22:25,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273876810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:25,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:25,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:25,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336793341] [2021-11-07 02:22:25,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:25,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:25,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:25,949 INFO L87 Difference]: Start difference. First operand 419 states and 726 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:26,058 INFO L93 Difference]: Finished difference Result 1227 states and 2130 transitions. [2021-11-07 02:22:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:22:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:26,065 INFO L225 Difference]: With dead ends: 1227 [2021-11-07 02:22:26,065 INFO L226 Difference]: Without dead ends: 823 [2021-11-07 02:22:26,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-07 02:22:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 418. [2021-11-07 02:22:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 1.7331730769230769) internal successors, (721), 417 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 721 transitions. [2021-11-07 02:22:26,131 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 721 transitions. Word has length 55 [2021-11-07 02:22:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:26,133 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 721 transitions. [2021-11-07 02:22:26,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:26,133 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 721 transitions. [2021-11-07 02:22:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:22:26,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:26,143 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 02:22:26,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:26,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:26,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1719201431, now seen corresponding path program 1 times [2021-11-07 02:22:26,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:26,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903475668] [2021-11-07 02:22:26,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:26,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:26,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:26,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:22:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:26,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:22:26,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:26,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:27,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:27,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903475668] [2021-11-07 02:22:27,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903475668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:27,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:27,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:22:27,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310909652] [2021-11-07 02:22:27,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:27,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:27,083 INFO L87 Difference]: Start difference. First operand 418 states and 721 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:27,333 INFO L93 Difference]: Finished difference Result 1589 states and 2746 transitions. [2021-11-07 02:22:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:22:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:22:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:27,341 INFO L225 Difference]: With dead ends: 1589 [2021-11-07 02:22:27,341 INFO L226 Difference]: Without dead ends: 1189 [2021-11-07 02:22:27,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-07 02:22:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 417. [2021-11-07 02:22:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.727710843373494) internal successors, (717), 416 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 717 transitions. [2021-11-07 02:22:27,376 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 717 transitions. Word has length 57 [2021-11-07 02:22:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:27,377 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 717 transitions. [2021-11-07 02:22:27,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 717 transitions. [2021-11-07 02:22:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:22:27,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:27,379 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:27,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 02:22:27,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:27,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1605998614, now seen corresponding path program 1 times [2021-11-07 02:22:27,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:27,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187238209] [2021-11-07 02:22:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:27,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:27,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:27,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:27,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:22:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:22:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:28,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:28,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:28,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187238209] [2021-11-07 02:22:28,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187238209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:28,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:28,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:28,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814254332] [2021-11-07 02:22:28,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:28,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:28,341 INFO L87 Difference]: Start difference. First operand 417 states and 717 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:28,413 INFO L93 Difference]: Finished difference Result 831 states and 1431 transitions. [2021-11-07 02:22:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:22:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:28,417 INFO L225 Difference]: With dead ends: 831 [2021-11-07 02:22:28,417 INFO L226 Difference]: Without dead ends: 422 [2021-11-07 02:22:28,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-07 02:22:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 417. [2021-11-07 02:22:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.7204819277108434) internal successors, (714), 416 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 714 transitions. [2021-11-07 02:22:28,451 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 714 transitions. Word has length 58 [2021-11-07 02:22:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:28,453 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 714 transitions. [2021-11-07 02:22:28,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 714 transitions. [2021-11-07 02:22:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:22:28,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:28,457 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] [2021-11-07 02:22:28,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:28,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:28,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1073781631, now seen corresponding path program 1 times [2021-11-07 02:22:28,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:28,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603311311] [2021-11-07 02:22:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:28,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:28,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:28,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:22:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:22:29,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:29,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:29,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:29,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603311311] [2021-11-07 02:22:29,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603311311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:29,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:29,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:22:29,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78805620] [2021-11-07 02:22:29,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:29,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:29,412 INFO L87 Difference]: Start difference. First operand 417 states and 714 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 02:22:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:29,707 INFO L93 Difference]: Finished difference Result 1576 states and 2722 transitions. [2021-11-07 02:22:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:22:29,708 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 59 [2021-11-07 02:22:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:29,716 INFO L225 Difference]: With dead ends: 1576 [2021-11-07 02:22:29,717 INFO L226 Difference]: Without dead ends: 1185 [2021-11-07 02:22:29,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-07 02:22:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 417. [2021-11-07 02:22:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.7132530120481928) internal successors, (711), 416 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 711 transitions. [2021-11-07 02:22:29,761 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 711 transitions. Word has length 59 [2021-11-07 02:22:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:29,761 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 711 transitions. [2021-11-07 02:22:29,761 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 02:22:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 711 transitions. [2021-11-07 02:22:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:22:29,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:29,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:29,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:29,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:29,977 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:29,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2004599866, now seen corresponding path program 1 times [2021-11-07 02:22:29,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:29,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087635052] [2021-11-07 02:22:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:29,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:29,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:29,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:29,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:22:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:30,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:30,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:30,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087635052] [2021-11-07 02:22:30,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087635052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:30,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:30,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:30,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293550399] [2021-11-07 02:22:30,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:30,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:30,747 INFO L87 Difference]: Start difference. First operand 417 states and 711 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 02:22:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:30,836 INFO L93 Difference]: Finished difference Result 985 states and 1680 transitions. [2021-11-07 02:22:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:30,836 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 02:22:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:30,842 INFO L225 Difference]: With dead ends: 985 [2021-11-07 02:22:30,842 INFO L226 Difference]: Without dead ends: 808 [2021-11-07 02:22:30,843 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 02:22:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-11-07 02:22:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 631. [2021-11-07 02:22:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 629 states have (on average 1.751987281399046) internal successors, (1102), 630 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1102 transitions. [2021-11-07 02:22:30,896 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1102 transitions. Word has length 61 [2021-11-07 02:22:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1102 transitions. [2021-11-07 02:22:30,897 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 02:22:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1102 transitions. [2021-11-07 02:22:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:22:30,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:30,899 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:30,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:31,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:31,113 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1916803125, now seen corresponding path program 1 times [2021-11-07 02:22:31,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:31,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567645553] [2021-11-07 02:22:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:31,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:31,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:31,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:22:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:31,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:31,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:31,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:31,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567645553] [2021-11-07 02:22:31,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567645553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:31,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:31,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:31,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763990123] [2021-11-07 02:22:31,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:31,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:31,907 INFO L87 Difference]: Start difference. First operand 631 states and 1102 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:32,001 INFO L93 Difference]: Finished difference Result 1517 states and 2654 transitions. [2021-11-07 02:22:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:22:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:32,008 INFO L225 Difference]: With dead ends: 1517 [2021-11-07 02:22:32,008 INFO L226 Difference]: Without dead ends: 970 [2021-11-07 02:22:32,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-07 02:22:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 793. [2021-11-07 02:22:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 791 states have (on average 1.7648546144121366) internal successors, (1396), 792 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1396 transitions. [2021-11-07 02:22:32,076 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1396 transitions. Word has length 73 [2021-11-07 02:22:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:32,079 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1396 transitions. [2021-11-07 02:22:32,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1396 transitions. [2021-11-07 02:22:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:22:32,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:32,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:32,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:32,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:32,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2091517718, now seen corresponding path program 1 times [2021-11-07 02:22:32,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:32,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296481377] [2021-11-07 02:22:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:32,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:32,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:32,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:32,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:22:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:32,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:33,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:33,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296481377] [2021-11-07 02:22:33,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296481377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:33,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:33,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:33,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388762874] [2021-11-07 02:22:33,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:33,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:33,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:33,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:33,128 INFO L87 Difference]: Start difference. First operand 793 states and 1396 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:33,236 INFO L93 Difference]: Finished difference Result 2047 states and 3622 transitions. [2021-11-07 02:22:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:22:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:33,245 INFO L225 Difference]: With dead ends: 2047 [2021-11-07 02:22:33,245 INFO L226 Difference]: Without dead ends: 1342 [2021-11-07 02:22:33,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-07 02:22:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1165. [2021-11-07 02:22:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1163 states have (on average 1.7833190025795356) internal successors, (2074), 1164 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2074 transitions. [2021-11-07 02:22:33,352 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2074 transitions. Word has length 74 [2021-11-07 02:22:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:33,352 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2074 transitions. [2021-11-07 02:22:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2074 transitions. [2021-11-07 02:22:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:22:33,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:33,356 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:33,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:33,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:33,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:33,571 INFO L85 PathProgramCache]: Analyzing trace with hash -971669094, now seen corresponding path program 1 times [2021-11-07 02:22:33,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:33,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518369029] [2021-11-07 02:22:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:33,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:33,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:33,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:33,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:22:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:34,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:34,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:34,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:34,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:34,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518369029] [2021-11-07 02:22:34,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518369029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:34,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:34,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:34,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987727914] [2021-11-07 02:22:34,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:34,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:34,367 INFO L87 Difference]: Start difference. First operand 1165 states and 2074 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 02:22:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:34,486 INFO L93 Difference]: Finished difference Result 2261 states and 4010 transitions. [2021-11-07 02:22:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 75 [2021-11-07 02:22:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:34,495 INFO L225 Difference]: With dead ends: 2261 [2021-11-07 02:22:34,495 INFO L226 Difference]: Without dead ends: 1342 [2021-11-07 02:22:34,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-07 02:22:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1165. [2021-11-07 02:22:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1163 states have (on average 1.7815993121238176) internal successors, (2072), 1164 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2072 transitions. [2021-11-07 02:22:34,577 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2072 transitions. Word has length 75 [2021-11-07 02:22:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:34,578 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2072 transitions. [2021-11-07 02:22:34,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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 02:22:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2072 transitions. [2021-11-07 02:22:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:22:34,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:34,581 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:34,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:34,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:34,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1362735737, now seen corresponding path program 1 times [2021-11-07 02:22:34,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:34,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888509829] [2021-11-07 02:22:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:34,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:34,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:34,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:22:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:35,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:35,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:35,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888509829] [2021-11-07 02:22:35,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888509829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:35,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:35,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:35,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643268806] [2021-11-07 02:22:35,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:35,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:35,619 INFO L87 Difference]: Start difference. First operand 1165 states and 2072 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:35,773 INFO L93 Difference]: Finished difference Result 3135 states and 5605 transitions. [2021-11-07 02:22:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:22:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:35,787 INFO L225 Difference]: With dead ends: 3135 [2021-11-07 02:22:35,787 INFO L226 Difference]: Without dead ends: 2066 [2021-11-07 02:22:35,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-11-07 02:22:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1889. [2021-11-07 02:22:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1887 states have (on average 1.797032326444091) internal successors, (3391), 1888 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 3391 transitions. [2021-11-07 02:22:35,938 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 3391 transitions. Word has length 75 [2021-11-07 02:22:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:35,938 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 3391 transitions. [2021-11-07 02:22:35,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 3391 transitions. [2021-11-07 02:22:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:22:35,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:35,943 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 02:22:35,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:36,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:36,161 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -47600340, now seen corresponding path program 1 times [2021-11-07 02:22:36,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:36,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315591867] [2021-11-07 02:22:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:36,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:36,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:22:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:36,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:36,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:36,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:37,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:37,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315591867] [2021-11-07 02:22:37,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315591867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:37,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:37,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:37,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450575355] [2021-11-07 02:22:37,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:37,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:37,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:37,040 INFO L87 Difference]: Start difference. First operand 1889 states and 3391 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 02:22:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:37,242 INFO L93 Difference]: Finished difference Result 5043 states and 9081 transitions. [2021-11-07 02:22:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:37,243 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 02:22:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:37,265 INFO L225 Difference]: With dead ends: 5043 [2021-11-07 02:22:37,265 INFO L226 Difference]: Without dead ends: 3284 [2021-11-07 02:22:37,270 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 02:22:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-11-07 02:22:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3107. [2021-11-07 02:22:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3105 states have (on average 1.8048309178743962) internal successors, (5604), 3106 states have internal predecessors, (5604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 5604 transitions. [2021-11-07 02:22:37,498 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 5604 transitions. Word has length 76 [2021-11-07 02:22:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:37,499 INFO L470 AbstractCegarLoop]: Abstraction has 3107 states and 5604 transitions. [2021-11-07 02:22:37,500 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 02:22:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 5604 transitions. [2021-11-07 02:22:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:22:37,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:37,508 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 02:22:37,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:37,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:37,723 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:37,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1025498678, now seen corresponding path program 1 times [2021-11-07 02:22:37,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:37,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653369129] [2021-11-07 02:22:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:37,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:37,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:37,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:37,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:22:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:38,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:38,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:38,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:38,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653369129] [2021-11-07 02:22:38,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653369129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:38,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:38,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:38,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014431072] [2021-11-07 02:22:38,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:38,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:38,680 INFO L87 Difference]: Start difference. First operand 3107 states and 5604 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 02:22:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:38,974 INFO L93 Difference]: Finished difference Result 8413 states and 15203 transitions. [2021-11-07 02:22:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:38,975 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 02:22:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:39,009 INFO L225 Difference]: With dead ends: 8413 [2021-11-07 02:22:39,010 INFO L226 Difference]: Without dead ends: 5470 [2021-11-07 02:22:39,016 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 02:22:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2021-11-07 02:22:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 5293. [2021-11-07 02:22:39,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 5291 states have (on average 1.8077868077868078) internal successors, (9565), 5292 states have internal predecessors, (9565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 9565 transitions. [2021-11-07 02:22:39,427 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 9565 transitions. Word has length 77 [2021-11-07 02:22:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:39,427 INFO L470 AbstractCegarLoop]: Abstraction has 5293 states and 9565 transitions. [2021-11-07 02:22:39,428 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 02:22:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 9565 transitions. [2021-11-07 02:22:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:22:39,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:39,436 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] [2021-11-07 02:22:39,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:39,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:39,652 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -6879762, now seen corresponding path program 1 times [2021-11-07 02:22:39,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:39,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632784761] [2021-11-07 02:22:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:39,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:39,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:39,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:39,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:22:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:22:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:40,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:40,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:40,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632784761] [2021-11-07 02:22:40,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632784761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:40,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:40,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:22:40,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177989791] [2021-11-07 02:22:40,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:40,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:40,731 INFO L87 Difference]: Start difference. First operand 5293 states and 9565 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:43,786 INFO L93 Difference]: Finished difference Result 19812 states and 35841 transitions. [2021-11-07 02:22:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:22:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 02:22:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:43,878 INFO L225 Difference]: With dead ends: 19812 [2021-11-07 02:22:43,878 INFO L226 Difference]: Without dead ends: 14763 [2021-11-07 02:22:43,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:43,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14763 states. [2021-11-07 02:22:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14763 to 5243. [2021-11-07 02:22:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5241 states have (on average 1.7868727342110284) internal successors, (9365), 5242 states have internal predecessors, (9365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 9365 transitions. [2021-11-07 02:22:44,429 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 9365 transitions. Word has length 78 [2021-11-07 02:22:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:44,429 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 9365 transitions. [2021-11-07 02:22:44,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 9365 transitions. [2021-11-07 02:22:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:22:44,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:44,437 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 02:22:44,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:44,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:44,653 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1641915037, now seen corresponding path program 1 times [2021-11-07 02:22:44,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:44,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115923992] [2021-11-07 02:22:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:44,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:44,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:44,655 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:44,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:22:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:45,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:45,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:45,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:45,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115923992] [2021-11-07 02:22:45,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115923992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:45,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:45,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002462095] [2021-11-07 02:22:45,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:45,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:45,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:45,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:22:45,789 INFO L87 Difference]: Start difference. First operand 5243 states and 9365 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 02:22:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:46,300 INFO L93 Difference]: Finished difference Result 15150 states and 27109 transitions. [2021-11-07 02:22:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:46,301 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 02:22:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:46,336 INFO L225 Difference]: With dead ends: 15150 [2021-11-07 02:22:46,336 INFO L226 Difference]: Without dead ends: 10078 [2021-11-07 02:22:46,345 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 02:22:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10078 states. [2021-11-07 02:22:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10078 to 9901. [2021-11-07 02:22:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9901 states, 9899 states have (on average 1.7882614405495505) internal successors, (17702), 9900 states have internal predecessors, (17702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9901 states to 9901 states and 17702 transitions. [2021-11-07 02:22:46,902 INFO L78 Accepts]: Start accepts. Automaton has 9901 states and 17702 transitions. Word has length 78 [2021-11-07 02:22:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:46,902 INFO L470 AbstractCegarLoop]: Abstraction has 9901 states and 17702 transitions. [2021-11-07 02:22:46,903 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 02:22:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 9901 states and 17702 transitions. [2021-11-07 02:22:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:22:46,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:46,913 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:46,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:47,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:47,128 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:47,129 INFO L85 PathProgramCache]: Analyzing trace with hash 911348905, now seen corresponding path program 1 times [2021-11-07 02:22:47,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:47,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397266818] [2021-11-07 02:22:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:47,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:47,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:47,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:47,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:22:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:22:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:48,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:48,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:48,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397266818] [2021-11-07 02:22:48,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397266818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:48,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1355430571] [2021-11-07 02:22:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:48,368 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:48,378 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:48,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:22:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:49,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:22:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:49,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:50,398 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 02:22:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1355430571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:50,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:50,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:22:50,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089463709] [2021-11-07 02:22:50,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:22:50,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:22:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:22:50,401 INFO L87 Difference]: Start difference. First operand 9901 states and 17702 transitions. Second operand has 16 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:05,279 INFO L93 Difference]: Finished difference Result 21816 states and 38554 transitions. [2021-11-07 02:23:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 02:23:05,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 02:23:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:05,337 INFO L225 Difference]: With dead ends: 21816 [2021-11-07 02:23:05,337 INFO L226 Difference]: Without dead ends: 21659 [2021-11-07 02:23:05,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 02:23:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21659 states. [2021-11-07 02:23:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21659 to 19630. [2021-11-07 02:23:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19630 states, 19628 states have (on average 1.7896372529040148) internal successors, (35127), 19629 states have internal predecessors, (35127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19630 states to 19630 states and 35127 transitions. [2021-11-07 02:23:06,471 INFO L78 Accepts]: Start accepts. Automaton has 19630 states and 35127 transitions. Word has length 79 [2021-11-07 02:23:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:06,471 INFO L470 AbstractCegarLoop]: Abstraction has 19630 states and 35127 transitions. [2021-11-07 02:23:06,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 19630 states and 35127 transitions. [2021-11-07 02:23:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:23:06,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:06,493 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] [2021-11-07 02:23:06,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:06,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:06,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:06,898 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1598716969, now seen corresponding path program 1 times [2021-11-07 02:23:06,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:06,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979829720] [2021-11-07 02:23:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:06,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:06,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:06,901 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:06,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:23:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:07,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:08,077 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:08,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979829720] [2021-11-07 02:23:08,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979829720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:08,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [645980662] [2021-11-07 02:23:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:08,078 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:08,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:08,079 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:08,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:23:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:23:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:09,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:10,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [645980662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:10,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:10,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:23:10,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721015392] [2021-11-07 02:23:10,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:23:10,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:23:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:23:10,094 INFO L87 Difference]: Start difference. First operand 19630 states and 35127 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 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) [2021-11-07 02:23:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:25,620 INFO L93 Difference]: Finished difference Result 42101 states and 74665 transitions. [2021-11-07 02:23:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 02:23:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 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) Word has length 80 [2021-11-07 02:23:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:25,716 INFO L225 Difference]: With dead ends: 42101 [2021-11-07 02:23:25,717 INFO L226 Difference]: Without dead ends: 41855 [2021-11-07 02:23:25,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 02:23:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41855 states. [2021-11-07 02:23:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41855 to 39007. [2021-11-07 02:23:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39007 states, 39005 states have (on average 1.7904371234457122) internal successors, (69836), 39006 states have internal predecessors, (69836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39007 states to 39007 states and 69836 transitions. [2021-11-07 02:23:28,111 INFO L78 Accepts]: Start accepts. Automaton has 39007 states and 69836 transitions. Word has length 80 [2021-11-07 02:23:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:28,111 INFO L470 AbstractCegarLoop]: Abstraction has 39007 states and 69836 transitions. [2021-11-07 02:23:28,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 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) [2021-11-07 02:23:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 39007 states and 69836 transitions. [2021-11-07 02:23:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:23:28,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:28,144 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] [2021-11-07 02:23:28,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:28,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 02:23:28,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:28,562 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash 997658653, now seen corresponding path program 1 times [2021-11-07 02:23:28,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:28,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298970239] [2021-11-07 02:23:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:28,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:28,564 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:28,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:23:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:29,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:29,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:29,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:29,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298970239] [2021-11-07 02:23:29,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298970239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:29,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235961490] [2021-11-07 02:23:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:29,747 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:29,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:29,753 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:29,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:23:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:23:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:31,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:31,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235961490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:31,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:31,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 02:23:31,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310640320] [2021-11-07 02:23:31,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:31,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:31,274 INFO L87 Difference]: Start difference. First operand 39007 states and 69836 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:34,907 INFO L93 Difference]: Finished difference Result 39630 states and 70849 transitions. [2021-11-07 02:23:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:23:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 02:23:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:35,002 INFO L225 Difference]: With dead ends: 39630 [2021-11-07 02:23:35,002 INFO L226 Difference]: Without dead ends: 39019 [2021-11-07 02:23:35,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:23:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39019 states. [2021-11-07 02:23:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39019 to 38959. [2021-11-07 02:23:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38959 states, 38957 states have (on average 1.7900248992478887) internal successors, (69734), 38958 states have internal predecessors, (69734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38959 states to 38959 states and 69734 transitions. [2021-11-07 02:23:37,151 INFO L78 Accepts]: Start accepts. Automaton has 38959 states and 69734 transitions. Word has length 80 [2021-11-07 02:23:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:37,151 INFO L470 AbstractCegarLoop]: Abstraction has 38959 states and 69734 transitions. [2021-11-07 02:23:37,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 38959 states and 69734 transitions. [2021-11-07 02:23:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:23:37,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:37,185 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] [2021-11-07 02:23:37,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:37,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:37,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:37,602 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash -975815435, now seen corresponding path program 1 times [2021-11-07 02:23:37,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:37,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992231831] [2021-11-07 02:23:37,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:37,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:37,605 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:37,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:23:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:38,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:38,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:38,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:38,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992231831] [2021-11-07 02:23:38,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992231831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:38,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1515891134] [2021-11-07 02:23:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:38,908 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:38,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:38,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:38,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:23:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:40,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:23:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:40,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:23:41,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1515891134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:41,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:41,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:23:41,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571343122] [2021-11-07 02:23:41,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:23:41,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:23:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:23:41,012 INFO L87 Difference]: Start difference. First operand 38959 states and 69734 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 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) [2021-11-07 02:24:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:04,927 INFO L93 Difference]: Finished difference Result 82470 states and 146493 transitions. [2021-11-07 02:24:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 02:24:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 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) Word has length 80 [2021-11-07 02:24:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:05,084 INFO L225 Difference]: With dead ends: 82470 [2021-11-07 02:24:05,084 INFO L226 Difference]: Without dead ends: 82046 [2021-11-07 02:24:05,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 02:24:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82046 states. [2021-11-07 02:24:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82046 to 77578. [2021-11-07 02:24:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77578 states, 77576 states have (on average 1.790386201918119) internal successors, (138891), 77577 states have internal predecessors, (138891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77578 states to 77578 states and 138891 transitions. [2021-11-07 02:24:09,434 INFO L78 Accepts]: Start accepts. Automaton has 77578 states and 138891 transitions. Word has length 80 [2021-11-07 02:24:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:09,434 INFO L470 AbstractCegarLoop]: Abstraction has 77578 states and 138891 transitions. [2021-11-07 02:24:09,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 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) [2021-11-07 02:24:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 77578 states and 138891 transitions. [2021-11-07 02:24:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:24:09,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:09,464 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] [2021-11-07 02:24:09,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:09,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:09,868 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash -913775821, now seen corresponding path program 1 times [2021-11-07 02:24:09,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:09,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975955545] [2021-11-07 02:24:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:09,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:09,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:09,872 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:09,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:24:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:10,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:11,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:11,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:11,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975955545] [2021-11-07 02:24:11,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975955545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:11,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [134263958] [2021-11-07 02:24:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:11,334 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:11,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:11,335 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:11,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:24:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 02:24:12,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:12,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [134263958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:13,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:13,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 02:24:13,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476026411] [2021-11-07 02:24:13,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:24:13,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:13,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:24:13,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:24:13,181 INFO L87 Difference]: Start difference. First operand 77578 states and 138891 transitions. Second operand has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:23,531 INFO L93 Difference]: Finished difference Result 86494 states and 152693 transitions. [2021-11-07 02:24:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 02:24:23,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 02:24:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:23,678 INFO L225 Difference]: With dead ends: 86494 [2021-11-07 02:24:23,679 INFO L226 Difference]: Without dead ends: 85693 [2021-11-07 02:24:23,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 02:24:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85693 states. [2021-11-07 02:24:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85693 to 78046. [2021-11-07 02:24:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78046 states, 78044 states have (on average 1.7883629747322023) internal successors, (139571), 78045 states have internal predecessors, (139571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78046 states to 78046 states and 139571 transitions. [2021-11-07 02:24:28,328 INFO L78 Accepts]: Start accepts. Automaton has 78046 states and 139571 transitions. Word has length 80 [2021-11-07 02:24:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:28,328 INFO L470 AbstractCegarLoop]: Abstraction has 78046 states and 139571 transitions. [2021-11-07 02:24:28,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.928571428571429) internal successors, (125), 14 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 78046 states and 139571 transitions. [2021-11-07 02:24:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:24:28,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:28,359 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] [2021-11-07 02:24:28,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 02:24:28,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:28,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:28,765 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:28,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1895346187, now seen corresponding path program 1 times [2021-11-07 02:24:28,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:28,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296988729] [2021-11-07 02:24:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:28,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:28,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:28,768 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:28,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:24:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:30,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:30,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296988729] [2021-11-07 02:24:30,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296988729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:30,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1578445600] [2021-11-07 02:24:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:30,159 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:30,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:30,160 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:30,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:24:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:24:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:31,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:24:31,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1578445600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:31,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:31,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:24:31,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181910402] [2021-11-07 02:24:31,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:31,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:24:31,820 INFO L87 Difference]: Start difference. First operand 78046 states and 139571 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:35,258 INFO L93 Difference]: Finished difference Result 78585 states and 140366 transitions. [2021-11-07 02:24:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:35,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 02:24:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:35,379 INFO L225 Difference]: With dead ends: 78585 [2021-11-07 02:24:35,379 INFO L226 Difference]: Without dead ends: 77723 [2021-11-07 02:24:35,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:24:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77723 states. [2021-11-07 02:24:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77723 to 77581. [2021-11-07 02:24:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77581 states, 77579 states have (on average 1.7890537387695125) internal successors, (138793), 77580 states have internal predecessors, (138793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77581 states to 77581 states and 138793 transitions. [2021-11-07 02:24:39,487 INFO L78 Accepts]: Start accepts. Automaton has 77581 states and 138793 transitions. Word has length 80 [2021-11-07 02:24:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:39,488 INFO L470 AbstractCegarLoop]: Abstraction has 77581 states and 138793 transitions. [2021-11-07 02:24:39,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 77581 states and 138793 transitions. [2021-11-07 02:24:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:24:39,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:39,511 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] [2021-11-07 02:24:39,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:39,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:39,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:39,940 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1738541367, now seen corresponding path program 1 times [2021-11-07 02:24:39,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:39,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251454292] [2021-11-07 02:24:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:39,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:39,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:39,942 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:39,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b86c2443-a582-434c-86df-e77c19fceaa6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process