./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product21.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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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 7cf7ce6a809409f6f4ca5aec26ee44d6ee6c1bd8459af1b8b074817ec65bb1ea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:27:17,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:27:17,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:27:17,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:27:17,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:27:17,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:27:17,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:27:17,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:27:17,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:27:17,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:27:17,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:27:17,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:27:17,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:27:17,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:27:17,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:27:17,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:27:17,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:27:17,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:27:17,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:27:17,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:27:17,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:27:17,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:27:17,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:27:17,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:27:17,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:27:17,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:27:17,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:27:17,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:27:17,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:27:17,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:27:17,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:27:17,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:27:17,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:27:17,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:27:17,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:27:17,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:27:17,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:27:17,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:27:17,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:27:17,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:27:17,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:27:17,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:27:17,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:27:17,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:27:17,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:27:17,376 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:27:17,376 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:27:17,377 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:27:17,377 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:27:17,377 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:27:17,377 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:27:17,377 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:27:17,384 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:27:17,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:27:17,385 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:27:17,385 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:27:17,385 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:27:17,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:27:17,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:27:17,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:27:17,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:27:17,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:27:17,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:27:17,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:27:17,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:27:17,388 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:27:17,388 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:27:17,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:27:17,388 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:27:17,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:27:17,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:27:17,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:27:17,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:17,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:27:17,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:27:17,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:27:17,391 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:27:17,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:27:17,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:27:17,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:27:17,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:27:17,392 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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cf7ce6a809409f6f4ca5aec26ee44d6ee6c1bd8459af1b8b074817ec65bb1ea [2021-11-07 01:27:17,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:27:17,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:27:17,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:27:17,703 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:27:17,704 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:27:17,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product21.cil.c [2021-11-07 01:27:17,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/6cc05e8e8/e81fe10b08b0465699718e2f3f2bee8e/FLAGb1a970192 [2021-11-07 01:27:18,409 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:27:18,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c [2021-11-07 01:27:18,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/6cc05e8e8/e81fe10b08b0465699718e2f3f2bee8e/FLAGb1a970192 [2021-11-07 01:27:18,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/6cc05e8e8/e81fe10b08b0465699718e2f3f2bee8e [2021-11-07 01:27:18,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:27:18,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:27:18,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:18,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:27:18,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:27:18,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:18" (1/1) ... [2021-11-07 01:27:18,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1a4b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:18, skipping insertion in model container [2021-11-07 01:27:18,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:18" (1/1) ... [2021-11-07 01:27:18,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:27:18,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:19,208 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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c[54302,54315] [2021-11-07 01:27:19,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:19,271 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:27:19,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10baf02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:19, skipping insertion in model container [2021-11-07 01:27:19,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:19,272 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:27:19,278 INFO L168 Benchmark]: Toolchain (without parser) took 640.26 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 55.8 MB in the beginning and 81.9 MB in the end (delta: -26.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:27:19,279 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 45.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:27:19,280 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.76 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 55.6 MB in the beginning and 81.9 MB in the end (delta: -26.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:27:19,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 90.2 MB. Free memory is still 45.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 637.76 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 55.6 MB in the beginning and 81.9 MB in the end (delta: -26.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2630]: 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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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 7cf7ce6a809409f6f4ca5aec26ee44d6ee6c1bd8459af1b8b074817ec65bb1ea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:27:21,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:27:21,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:27:21,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:27:21,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:27:21,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:27:21,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:27:21,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:27:21,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:27:21,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:27:21,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:27:21,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:27:21,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:27:21,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:27:21,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:27:21,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:27:21,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:27:21,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:27:21,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:27:21,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:27:21,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:27:21,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:27:21,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:27:21,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:27:21,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:27:21,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:27:21,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:27:21,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:27:21,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:27:21,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:27:21,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:27:21,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:27:21,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:27:21,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:27:21,630 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:27:21,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:27:21,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:27:21,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:27:21,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:27:21,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:27:21,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:27:21,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:27:21,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:27:21,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:27:21,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:27:21,686 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:27:21,686 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:27:21,686 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:27:21,687 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:27:21,687 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:27:21,687 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:27:21,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:27:21,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:27:21,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:27:21,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:27:21,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:27:21,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:27:21,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:27:21,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:27:21,691 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:27:21,691 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:27:21,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:27:21,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:27:21,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:27:21,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:27:21,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:27:21,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:27:21,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:27:21,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:21,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:27:21,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:27:21,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:27:21,694 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:27:21,694 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:21,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:27:21,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:27:21,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:27:21,696 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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cf7ce6a809409f6f4ca5aec26ee44d6ee6c1bd8459af1b8b074817ec65bb1ea [2021-11-07 01:27:22,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:27:22,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:27:22,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:27:22,092 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:27:22,094 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:27:22,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product21.cil.c [2021-11-07 01:27:22,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/e2cae266f/e3447619837b46b780272f6e6b0c6637/FLAG7f9a31e5c [2021-11-07 01:27:23,003 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:27:23,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c [2021-11-07 01:27:23,024 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/e2cae266f/e3447619837b46b780272f6e6b0c6637/FLAG7f9a31e5c [2021-11-07 01:27:23,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/data/e2cae266f/e3447619837b46b780272f6e6b0c6637 [2021-11-07 01:27:23,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:27:23,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:27:23,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:23,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:27:23,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:27:23,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:23" (1/1) ... [2021-11-07 01:27:23,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7bf678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:23, skipping insertion in model container [2021-11-07 01:27:23,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:27:23" (1/1) ... [2021-11-07 01:27:23,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:27:23,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:23,769 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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c[54302,54315] [2021-11-07 01:27:23,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:23,826 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:27:23,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:23,922 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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c[54302,54315] [2021-11-07 01:27:23,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:23,960 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:27:24,081 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_db258f4f-ae92-4ca7-8aa2-7896c205efd7/sv-benchmarks/c/product-lines/email_spec6_product21.cil.c[54302,54315] [2021-11-07 01:27:24,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:24,149 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:27:24,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24 WrapperNode [2021-11-07 01:27:24,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:24,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:24,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:27:24,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:27:24,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:24,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:27:24,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:27:24,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:27:24,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:27:24,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:27:24,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:27:24,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:27:24,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (1/1) ... [2021-11-07 01:27:24,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:24,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:24,551 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:27:24,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:27:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:27:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:27:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:27:24,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:27:24,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:27:30,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:27:30,394 INFO L299 CfgBuilder]: Removed 673 assume(true) statements. [2021-11-07 01:27:30,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:30 BoogieIcfgContainer [2021-11-07 01:27:30,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:27:30,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:27:30,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:27:30,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:27:30,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:27:23" (1/3) ... [2021-11-07 01:27:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c9a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:30, skipping insertion in model container [2021-11-07 01:27:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:24" (2/3) ... [2021-11-07 01:27:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c9a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:30, skipping insertion in model container [2021-11-07 01:27:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:30" (3/3) ... [2021-11-07 01:27:30,405 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product21.cil.c [2021-11-07 01:27:30,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:27:30,411 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:27:30,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:27:30,468 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:27:30,469 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:27:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 1004 states, 997 states have (on average 1.733199598796389) internal successors, (1728), 1003 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:27:30,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:30,521 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:30,522 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1808309319, now seen corresponding path program 1 times [2021-11-07 01:27:30,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:30,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696809105] [2021-11-07 01:27:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:30,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:30,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:30,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:30,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:27:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:27:31,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:31,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:31,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696809105] [2021-11-07 01:27:31,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696809105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:31,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:31,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:27:31,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005084746] [2021-11-07 01:27:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:27:31,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:27:31,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:27:31,510 INFO L87 Difference]: Start difference. First operand has 1004 states, 997 states have (on average 1.733199598796389) internal successors, (1728), 1003 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:31,669 INFO L93 Difference]: Finished difference Result 1723 states and 2933 transitions. [2021-11-07 01:27:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:27:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:27:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:31,716 INFO L225 Difference]: With dead ends: 1723 [2021-11-07 01:27:31,716 INFO L226 Difference]: Without dead ends: 890 [2021-11-07 01:27:31,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:27:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-07 01:27:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-11-07 01:27:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 884 states have (on average 1.7319004524886878) internal successors, (1531), 889 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1531 transitions. [2021-11-07 01:27:31,892 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1531 transitions. Word has length 53 [2021-11-07 01:27:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:31,893 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1531 transitions. [2021-11-07 01:27:31,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1531 transitions. [2021-11-07 01:27:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:27:31,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:31,898 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 01:27:31,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:32,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:32,113 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:32,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1665555471, now seen corresponding path program 1 times [2021-11-07 01:27:32,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:32,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080434147] [2021-11-07 01:27:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:32,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:32,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:32,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:32,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:27:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:32,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:27:32,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:32,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:32,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:32,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080434147] [2021-11-07 01:27:32,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080434147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:32,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:32,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440723189] [2021-11-07 01:27:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:32,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:32,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:32,893 INFO L87 Difference]: Start difference. First operand 890 states and 1531 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:33,064 INFO L93 Difference]: Finished difference Result 2640 states and 4545 transitions. [2021-11-07 01:27:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:27:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:33,082 INFO L225 Difference]: With dead ends: 2640 [2021-11-07 01:27:33,083 INFO L226 Difference]: Without dead ends: 1765 [2021-11-07 01:27:33,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-11-07 01:27:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 889. [2021-11-07 01:27:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 883 states have (on average 1.7281993204983013) internal successors, (1526), 888 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1526 transitions. [2021-11-07 01:27:33,164 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1526 transitions. Word has length 54 [2021-11-07 01:27:33,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:33,166 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1526 transitions. [2021-11-07 01:27:33,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1526 transitions. [2021-11-07 01:27:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:27:33,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:33,177 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] [2021-11-07 01:27:33,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:27:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:33,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1006102633, now seen corresponding path program 1 times [2021-11-07 01:27:33,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:33,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884663267] [2021-11-07 01:27:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:33,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:33,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:33,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:27:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:33,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:27:33,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:34,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:34,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:34,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884663267] [2021-11-07 01:27:34,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884663267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:34,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:34,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:34,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262343017] [2021-11-07 01:27:34,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:34,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:34,168 INFO L87 Difference]: Start difference. First operand 889 states and 1526 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 01:27:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:34,559 INFO L93 Difference]: Finished difference Result 3473 states and 5966 transitions. [2021-11-07 01:27:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:27:34,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 56 [2021-11-07 01:27:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:34,577 INFO L225 Difference]: With dead ends: 3473 [2021-11-07 01:27:34,578 INFO L226 Difference]: Without dead ends: 2602 [2021-11-07 01:27:34,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-11-07 01:27:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 888. [2021-11-07 01:27:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 882 states have (on average 1.72562358276644) internal successors, (1522), 887 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1522 transitions. [2021-11-07 01:27:34,652 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1522 transitions. Word has length 56 [2021-11-07 01:27:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:34,652 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1522 transitions. [2021-11-07 01:27:34,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 01:27:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1522 transitions. [2021-11-07 01:27:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:27:34,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:34,655 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:34,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:34,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,869 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash -625182538, now seen corresponding path program 1 times [2021-11-07 01:27:34,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:34,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311404678] [2021-11-07 01:27:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:34,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:34,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:34,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:34,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:27:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:35,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:27:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:35,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:35,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:35,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311404678] [2021-11-07 01:27:35,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311404678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:35,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:35,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:35,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288999530] [2021-11-07 01:27:35,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:35,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:35,657 INFO L87 Difference]: Start difference. First operand 888 states and 1522 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:35,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:35,761 INFO L93 Difference]: Finished difference Result 1773 states and 3041 transitions. [2021-11-07 01:27:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:35,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:27:35,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:35,768 INFO L225 Difference]: With dead ends: 1773 [2021-11-07 01:27:35,768 INFO L226 Difference]: Without dead ends: 893 [2021-11-07 01:27:35,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-07 01:27:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 888. [2021-11-07 01:27:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 882 states have (on average 1.7222222222222223) internal successors, (1519), 887 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1519 transitions. [2021-11-07 01:27:35,833 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1519 transitions. Word has length 57 [2021-11-07 01:27:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:35,835 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1519 transitions. [2021-11-07 01:27:35,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1519 transitions. [2021-11-07 01:27:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:27:35,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:35,839 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:35,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:36,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:36,053 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1647116671, now seen corresponding path program 1 times [2021-11-07 01:27:36,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:36,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663515187] [2021-11-07 01:27:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:36,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:36,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:36,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:36,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:27:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:27:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:36,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:36,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:36,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663515187] [2021-11-07 01:27:36,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663515187] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:36,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:36,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:36,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414916203] [2021-11-07 01:27:36,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:36,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:36,867 INFO L87 Difference]: Start difference. First operand 888 states and 1519 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:37,263 INFO L93 Difference]: Finished difference Result 3460 states and 5942 transitions. [2021-11-07 01:27:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:27:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:27:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:37,280 INFO L225 Difference]: With dead ends: 3460 [2021-11-07 01:27:37,280 INFO L226 Difference]: Without dead ends: 2598 [2021-11-07 01:27:37,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-11-07 01:27:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 888. [2021-11-07 01:27:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 882 states have (on average 1.7188208616780045) internal successors, (1516), 887 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1516 transitions. [2021-11-07 01:27:37,381 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1516 transitions. Word has length 58 [2021-11-07 01:27:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:37,381 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1516 transitions. [2021-11-07 01:27:37,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1516 transitions. [2021-11-07 01:27:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:27:37,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:37,384 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:37,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:27:37,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:37,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 876761702, now seen corresponding path program 1 times [2021-11-07 01:27:37,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:37,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385782383] [2021-11-07 01:27:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:37,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:37,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:37,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:27:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:38,165 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 01:27:38,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:38,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:38,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385782383] [2021-11-07 01:27:38,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385782383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:38,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:38,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:38,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749930310] [2021-11-07 01:27:38,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:38,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:38,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:38,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:38,338 INFO L87 Difference]: Start difference. First operand 888 states and 1516 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:38,529 INFO L93 Difference]: Finished difference Result 2355 states and 4013 transitions. [2021-11-07 01:27:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:27:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:38,541 INFO L225 Difference]: With dead ends: 2355 [2021-11-07 01:27:38,541 INFO L226 Difference]: Without dead ends: 1750 [2021-11-07 01:27:38,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-11-07 01:27:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1145. [2021-11-07 01:27:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1139 states have (on average 1.7462686567164178) internal successors, (1989), 1144 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1989 transitions. [2021-11-07 01:27:38,652 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1989 transitions. Word has length 60 [2021-11-07 01:27:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:38,652 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1989 transitions. [2021-11-07 01:27:38,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1989 transitions. [2021-11-07 01:27:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:27:38,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:38,655 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:38,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:38,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:38,870 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2007848693, now seen corresponding path program 1 times [2021-11-07 01:27:38,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:38,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339128847] [2021-11-07 01:27:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:38,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:38,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:38,873 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:38,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:27:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:39,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:39,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339128847] [2021-11-07 01:27:39,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339128847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:39,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:39,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:39,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821063150] [2021-11-07 01:27:39,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:39,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:39,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:39,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:39,746 INFO L87 Difference]: Start difference. First operand 1145 states and 1989 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:39,937 INFO L93 Difference]: Finished difference Result 3016 states and 5233 transitions. [2021-11-07 01:27:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:27:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:39,950 INFO L225 Difference]: With dead ends: 3016 [2021-11-07 01:27:39,950 INFO L226 Difference]: Without dead ends: 1955 [2021-11-07 01:27:39,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-11-07 01:27:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1350. [2021-11-07 01:27:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1344 states have (on average 1.759672619047619) internal successors, (2365), 1349 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2365 transitions. [2021-11-07 01:27:40,061 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2365 transitions. Word has length 72 [2021-11-07 01:27:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:40,061 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 2365 transitions. [2021-11-07 01:27:40,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2365 transitions. [2021-11-07 01:27:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:27:40,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:40,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:40,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:40,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:40,279 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1586570742, now seen corresponding path program 1 times [2021-11-07 01:27:40,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:40,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142217503] [2021-11-07 01:27:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:40,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:40,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:40,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:27:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:40,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:41,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:41,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:41,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142217503] [2021-11-07 01:27:41,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142217503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:41,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:41,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:41,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268990185] [2021-11-07 01:27:41,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:41,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:41,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:41,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:41,242 INFO L87 Difference]: Start difference. First operand 1350 states and 2365 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 01:27:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:41,418 INFO L93 Difference]: Finished difference Result 3675 states and 6447 transitions. [2021-11-07 01:27:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:41,419 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 01:27:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:41,434 INFO L225 Difference]: With dead ends: 3675 [2021-11-07 01:27:41,434 INFO L226 Difference]: Without dead ends: 2413 [2021-11-07 01:27:41,437 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 01:27:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-11-07 01:27:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1808. [2021-11-07 01:27:41,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1802 states have (on average 1.7796892341842396) internal successors, (3207), 1807 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3207 transitions. [2021-11-07 01:27:41,604 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3207 transitions. Word has length 73 [2021-11-07 01:27:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:41,605 INFO L470 AbstractCegarLoop]: Abstraction has 1808 states and 3207 transitions. [2021-11-07 01:27:41,605 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 01:27:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3207 transitions. [2021-11-07 01:27:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:27:41,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:41,610 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] [2021-11-07 01:27:41,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:41,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:41,825 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 919300358, now seen corresponding path program 1 times [2021-11-07 01:27:41,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:41,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386259423] [2021-11-07 01:27:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:41,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:41,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:41,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:41,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:27:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:42,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:42,587 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 01:27:42,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:42,743 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 01:27:42,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:42,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386259423] [2021-11-07 01:27:42,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386259423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:42,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:42,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:42,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888167258] [2021-11-07 01:27:42,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:42,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:42,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:42,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:42,745 INFO L87 Difference]: Start difference. First operand 1808 states and 3207 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:42,951 INFO L93 Difference]: Finished difference Result 3932 states and 6917 transitions. [2021-11-07 01:27:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:27:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:42,966 INFO L225 Difference]: With dead ends: 3932 [2021-11-07 01:27:42,967 INFO L226 Difference]: Without dead ends: 2413 [2021-11-07 01:27:42,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-11-07 01:27:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1808. [2021-11-07 01:27:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1802 states have (on average 1.7785793562708103) internal successors, (3205), 1807 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3205 transitions. [2021-11-07 01:27:43,092 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3205 transitions. Word has length 74 [2021-11-07 01:27:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:43,093 INFO L470 AbstractCegarLoop]: Abstraction has 1808 states and 3205 transitions. [2021-11-07 01:27:43,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3205 transitions. [2021-11-07 01:27:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:27:43,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:43,097 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:43,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:43,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,312 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -241664377, now seen corresponding path program 1 times [2021-11-07 01:27:43,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:43,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544764088] [2021-11-07 01:27:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:43,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:43,314 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:43,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:27:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:44,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:44,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:44,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544764088] [2021-11-07 01:27:44,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544764088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:44,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:44,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:44,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238540234] [2021-11-07 01:27:44,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:44,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:44,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:44,165 INFO L87 Difference]: Start difference. First operand 1808 states and 3205 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 01:27:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:44,376 INFO L93 Difference]: Finished difference Result 5021 states and 8922 transitions. [2021-11-07 01:27:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:44,377 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 01:27:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:44,397 INFO L225 Difference]: With dead ends: 5021 [2021-11-07 01:27:44,397 INFO L226 Difference]: Without dead ends: 3309 [2021-11-07 01:27:44,401 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 01:27:44,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2021-11-07 01:27:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 2704. [2021-11-07 01:27:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 2698 states have (on average 1.798369162342476) internal successors, (4852), 2703 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 4852 transitions. [2021-11-07 01:27:44,613 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 4852 transitions. Word has length 74 [2021-11-07 01:27:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:44,613 INFO L470 AbstractCegarLoop]: Abstraction has 2704 states and 4852 transitions. [2021-11-07 01:27:44,614 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 01:27:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 4852 transitions. [2021-11-07 01:27:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:27:44,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:44,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:44,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:44,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:44,834 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash 959766900, now seen corresponding path program 1 times [2021-11-07 01:27:44,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:44,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109763439] [2021-11-07 01:27:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:44,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:44,837 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:44,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:27:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:45,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:45,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:45,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109763439] [2021-11-07 01:27:45,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109763439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:45,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:45,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:45,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375913384] [2021-11-07 01:27:45,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:45,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:45,832 INFO L87 Difference]: Start difference. First operand 2704 states and 4852 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 01:27:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:46,149 INFO L93 Difference]: Finished difference Result 7445 states and 13382 transitions. [2021-11-07 01:27:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:46,150 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 01:27:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:46,192 INFO L225 Difference]: With dead ends: 7445 [2021-11-07 01:27:46,192 INFO L226 Difference]: Without dead ends: 4871 [2021-11-07 01:27:46,197 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 01:27:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-11-07 01:27:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4266. [2021-11-07 01:27:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4266 states, 4260 states have (on average 1.8124413145539906) internal successors, (7721), 4265 states have internal predecessors, (7721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:46,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4266 states to 4266 states and 7721 transitions. [2021-11-07 01:27:46,511 INFO L78 Accepts]: Start accepts. Automaton has 4266 states and 7721 transitions. Word has length 75 [2021-11-07 01:27:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:46,512 INFO L470 AbstractCegarLoop]: Abstraction has 4266 states and 7721 transitions. [2021-11-07 01:27:46,512 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 01:27:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4266 states and 7721 transitions. [2021-11-07 01:27:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:27:46,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:46,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:46,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:46,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:46,749 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1565630186, now seen corresponding path program 1 times [2021-11-07 01:27:46,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:46,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160377630] [2021-11-07 01:27:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:46,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:46,751 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:46,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:27:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:47,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:47,678 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 01:27:47,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:47,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160377630] [2021-11-07 01:27:47,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160377630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:47,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:47,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:47,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379946168] [2021-11-07 01:27:47,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:47,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:47,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:47,682 INFO L87 Difference]: Start difference. First operand 4266 states and 7721 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:47,989 INFO L93 Difference]: Finished difference Result 11847 states and 21472 transitions. [2021-11-07 01:27:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:47,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:27:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:48,014 INFO L225 Difference]: With dead ends: 11847 [2021-11-07 01:27:48,014 INFO L226 Difference]: Without dead ends: 7745 [2021-11-07 01:27:48,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7745 states. [2021-11-07 01:27:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7745 to 7140. [2021-11-07 01:27:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7134 states have (on average 1.8214185590131764) internal successors, (12994), 7139 states have internal predecessors, (12994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 12994 transitions. [2021-11-07 01:27:48,564 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 12994 transitions. Word has length 76 [2021-11-07 01:27:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:48,564 INFO L470 AbstractCegarLoop]: Abstraction has 7140 states and 12994 transitions. [2021-11-07 01:27:48,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 12994 transitions. [2021-11-07 01:27:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:27:48,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:48,576 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] [2021-11-07 01:27:48,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:48,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:48,790 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash 396233266, now seen corresponding path program 1 times [2021-11-07 01:27:48,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:48,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090162934] [2021-11-07 01:27:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:48,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:48,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:48,793 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:48,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:27:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:49,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:49,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:49,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090162934] [2021-11-07 01:27:49,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090162934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:49,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:49,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:49,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213433841] [2021-11-07 01:27:49,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:49,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:49,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:49,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:49,841 INFO L87 Difference]: Start difference. First operand 7140 states and 12994 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:53,163 INFO L93 Difference]: Finished difference Result 27071 states and 49311 transitions. [2021-11-07 01:27:53,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:27:53,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:27:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:53,225 INFO L225 Difference]: With dead ends: 27071 [2021-11-07 01:27:53,225 INFO L226 Difference]: Without dead ends: 20218 [2021-11-07 01:27:53,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2021-11-07 01:27:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 7090. [2021-11-07 01:27:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7090 states, 7084 states have (on average 1.806041784302654) internal successors, (12794), 7089 states have internal predecessors, (12794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7090 states to 7090 states and 12794 transitions. [2021-11-07 01:27:53,926 INFO L78 Accepts]: Start accepts. Automaton has 7090 states and 12794 transitions. Word has length 77 [2021-11-07 01:27:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:53,926 INFO L470 AbstractCegarLoop]: Abstraction has 7090 states and 12794 transitions. [2021-11-07 01:27:53,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7090 states and 12794 transitions. [2021-11-07 01:27:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:27:53,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:53,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:53,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:54,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:54,153 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:54,153 INFO L85 PathProgramCache]: Analyzing trace with hash -94111261, now seen corresponding path program 1 times [2021-11-07 01:27:54,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:54,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614106311] [2021-11-07 01:27:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:54,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:54,155 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:54,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:27:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:54,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:55,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:55,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614106311] [2021-11-07 01:27:55,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614106311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:55,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:55,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:55,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386126309] [2021-11-07 01:27:55,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:55,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:55,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:55,150 INFO L87 Difference]: Start difference. First operand 7090 states and 12794 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:55,698 INFO L93 Difference]: Finished difference Result 20648 states and 37314 transitions. [2021-11-07 01:27:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:55,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:27:55,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:55,732 INFO L225 Difference]: With dead ends: 20648 [2021-11-07 01:27:55,732 INFO L226 Difference]: Without dead ends: 13729 [2021-11-07 01:27:55,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13729 states. [2021-11-07 01:27:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13729 to 13124. [2021-11-07 01:27:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13124 states, 13118 states have (on average 1.8108705595365147) internal successors, (23755), 13123 states have internal predecessors, (23755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13124 states to 13124 states and 23755 transitions. [2021-11-07 01:27:56,439 INFO L78 Accepts]: Start accepts. Automaton has 13124 states and 23755 transitions. Word has length 77 [2021-11-07 01:27:56,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:56,440 INFO L470 AbstractCegarLoop]: Abstraction has 13124 states and 23755 transitions. [2021-11-07 01:27:56,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 13124 states and 23755 transitions. [2021-11-07 01:27:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:27:56,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:56,452 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 01:27:56,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:56,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:56,665 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1949874199, now seen corresponding path program 1 times [2021-11-07 01:27:56,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:56,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648313635] [2021-11-07 01:27:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:56,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:56,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:56,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:56,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:27:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:57,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:57,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:57,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648313635] [2021-11-07 01:27:57,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648313635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:57,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822672381] [2021-11-07 01:27:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:57,812 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:57,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:57,812 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:57,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:27:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:27:58,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:27:59,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:27:59,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822672381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:59,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:59,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:27:59,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853283188] [2021-11-07 01:27:59,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:27:59,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:27:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:27:59,941 INFO L87 Difference]: Start difference. First operand 13124 states and 23755 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 01:28:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:24,523 INFO L93 Difference]: Finished difference Result 33741 states and 59765 transitions. [2021-11-07 01:28:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:28:24,523 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 78 [2021-11-07 01:28:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:24,585 INFO L225 Difference]: With dead ends: 33741 [2021-11-07 01:28:24,585 INFO L226 Difference]: Without dead ends: 33193 [2021-11-07 01:28:24,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:28:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33193 states. [2021-11-07 01:28:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33193 to 26406. [2021-11-07 01:28:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26406 states, 26400 states have (on average 1.810151515151515) internal successors, (47788), 26405 states have internal predecessors, (47788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26406 states to 26406 states and 47788 transitions. [2021-11-07 01:28:26,092 INFO L78 Accepts]: Start accepts. Automaton has 26406 states and 47788 transitions. Word has length 78 [2021-11-07 01:28:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:26,092 INFO L470 AbstractCegarLoop]: Abstraction has 26406 states and 47788 transitions. [2021-11-07 01:28:26,093 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 01:28:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 26406 states and 47788 transitions. [2021-11-07 01:28:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:28:26,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:26,114 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 01:28:26,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:26,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:26,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:26,529 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:28:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1912030965, now seen corresponding path program 1 times [2021-11-07 01:28:26,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:26,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425333154] [2021-11-07 01:28:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:26,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:26,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:26,531 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:26,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:28:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:27,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:28:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:27,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:27,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:27,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425333154] [2021-11-07 01:28:27,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425333154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:27,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [365639798] [2021-11-07 01:28:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:27,690 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:27,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:27,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:27,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:28:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:28,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:28:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:28:29,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:28:29,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [365639798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:29,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:29,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:28:29,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492626566] [2021-11-07 01:28:29,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:28:29,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:29,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:28:29,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:28:29,253 INFO L87 Difference]: Start difference. First operand 26406 states and 47788 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 01:28:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:32,539 INFO L93 Difference]: Finished difference Result 28151 states and 50687 transitions. [2021-11-07 01:28:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:28:32,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 79 [2021-11-07 01:28:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:32,592 INFO L225 Difference]: With dead ends: 28151 [2021-11-07 01:28:32,592 INFO L226 Difference]: Without dead ends: 26707 [2021-11-07 01:28:32,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:28:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26707 states. [2021-11-07 01:28:33,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26707 to 26352. [2021-11-07 01:28:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26352 states, 26346 states have (on average 1.8093069156608215) internal successors, (47668), 26351 states have internal predecessors, (47668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26352 states to 26352 states and 47668 transitions. [2021-11-07 01:28:33,919 INFO L78 Accepts]: Start accepts. Automaton has 26352 states and 47668 transitions. Word has length 79 [2021-11-07 01:28:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:33,919 INFO L470 AbstractCegarLoop]: Abstraction has 26352 states and 47668 transitions. [2021-11-07 01:28:33,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 01:28:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 26352 states and 47668 transitions. [2021-11-07 01:28:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:28:33,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:33,939 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 01:28:33,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:34,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:34,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:34,344 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:28:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1675534285, now seen corresponding path program 1 times [2021-11-07 01:28:34,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:34,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229810304] [2021-11-07 01:28:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:34,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:34,346 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:34,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:28:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:35,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:28:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:35,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:35,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:35,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229810304] [2021-11-07 01:28:35,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229810304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:35,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550274509] [2021-11-07 01:28:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:35,540 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:35,541 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:28:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:28:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:28:37,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:28:37,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550274509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:37,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:37,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:28:37,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285678011] [2021-11-07 01:28:37,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:28:37,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:28:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:28:37,508 INFO L87 Difference]: Start difference. First operand 26352 states and 47668 transitions. Second operand has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:58,726 INFO L93 Difference]: Finished difference Result 66097 states and 117367 transitions. [2021-11-07 01:28:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:28:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 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 79 [2021-11-07 01:28:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:58,814 INFO L225 Difference]: With dead ends: 66097 [2021-11-07 01:28:58,815 INFO L226 Difference]: Without dead ends: 64901 [2021-11-07 01:28:58,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:28:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64901 states. [2021-11-07 01:29:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64901 to 52770. [2021-11-07 01:29:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52770 states, 52764 states have (on average 1.808827988780229) internal successors, (95441), 52769 states have internal predecessors, (95441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52770 states to 52770 states and 95441 transitions. [2021-11-07 01:29:01,560 INFO L78 Accepts]: Start accepts. Automaton has 52770 states and 95441 transitions. Word has length 79 [2021-11-07 01:29:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:01,560 INFO L470 AbstractCegarLoop]: Abstraction has 52770 states and 95441 transitions. [2021-11-07 01:29:01,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 15 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 52770 states and 95441 transitions. [2021-11-07 01:29:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:29:01,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:01,583 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 01:29:01,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:01,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:01,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:01,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:29:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1894389003, now seen corresponding path program 1 times [2021-11-07 01:29:01,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:01,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764037319] [2021-11-07 01:29:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:01,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:01,988 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:01,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:29:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:03,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:03,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:03,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:03,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764037319] [2021-11-07 01:29:03,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764037319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:03,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912017325] [2021-11-07 01:29:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:03,502 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:03,514 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:03,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:29:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:29:04,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:29:05,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1912017325] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:05,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:05,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 14 [2021-11-07 01:29:05,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521070741] [2021-11-07 01:29:05,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:29:05,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:29:05,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:29:05,263 INFO L87 Difference]: Start difference. First operand 52770 states and 95441 transitions. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:13,066 INFO L93 Difference]: Finished difference Result 80206 states and 140789 transitions. [2021-11-07 01:29:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:29:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:29:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:13,163 INFO L225 Difference]: With dead ends: 80206 [2021-11-07 01:29:13,163 INFO L226 Difference]: Without dead ends: 77404 [2021-11-07 01:29:13,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:29:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77404 states. [2021-11-07 01:29:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77404 to 56052. [2021-11-07 01:29:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56052 states, 56046 states have (on average 1.7986118545480498) internal successors, (100805), 56051 states have internal predecessors, (100805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56052 states to 56052 states and 100805 transitions. [2021-11-07 01:29:16,867 INFO L78 Accepts]: Start accepts. Automaton has 56052 states and 100805 transitions. Word has length 79 [2021-11-07 01:29:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:16,867 INFO L470 AbstractCegarLoop]: Abstraction has 56052 states and 100805 transitions. [2021-11-07 01:29:16,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 56052 states and 100805 transitions. [2021-11-07 01:29:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:29:16,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:16,890 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 01:29:16,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:17,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:29:17,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:17,291 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:29:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1304679907, now seen corresponding path program 1 times [2021-11-07 01:29:17,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:17,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287303986] [2021-11-07 01:29:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:17,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:17,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:17,293 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:17,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:29:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:18,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:18,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:18,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287303986] [2021-11-07 01:29:18,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287303986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:18,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215308271] [2021-11-07 01:29:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:18,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:18,600 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:18,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:29:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:29:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:20,092 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 01:29:20,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:29:20,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [215308271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:20,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:20,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:29:20,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94404380] [2021-11-07 01:29:20,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:29:20,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:29:20,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:29:20,259 INFO L87 Difference]: Start difference. First operand 56052 states and 100805 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 01:29:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:24,377 INFO L93 Difference]: Finished difference Result 65788 states and 116830 transitions. [2021-11-07 01:29:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:29:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 01:29:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:24,472 INFO L225 Difference]: With dead ends: 65788 [2021-11-07 01:29:24,472 INFO L226 Difference]: Without dead ends: 59764 [2021-11-07 01:29:24,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:29:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59764 states. [2021-11-07 01:29:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59764 to 55527. [2021-11-07 01:29:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55527 states, 55521 states have (on average 1.79973343419607) internal successors, (99923), 55526 states have internal predecessors, (99923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55527 states to 55527 states and 99923 transitions. [2021-11-07 01:29:27,904 INFO L78 Accepts]: Start accepts. Automaton has 55527 states and 99923 transitions. Word has length 80 [2021-11-07 01:29:27,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:27,904 INFO L470 AbstractCegarLoop]: Abstraction has 55527 states and 99923 transitions. [2021-11-07 01:29:27,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 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 01:29:27,904 INFO L276 IsEmpty]: Start isEmpty. Operand 55527 states and 99923 transitions. [2021-11-07 01:29:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:29:27,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:27,921 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:27,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 01:29:28,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:28,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:28,322 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:29:28,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash 993777067, now seen corresponding path program 1 times [2021-11-07 01:29:28,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:28,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532439352] [2021-11-07 01:29:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:28,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:28,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:28,324 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:28,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:29:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:29,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:29,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:29,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:29,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:29,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532439352] [2021-11-07 01:29:29,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532439352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:29,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1620377855] [2021-11-07 01:29:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:29,678 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:29,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:29,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:29,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:29:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:31,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:31,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:29:31,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:29:31,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1620377855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:31,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:31,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:29:31,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427291] [2021-11-07 01:29:31,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:31,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:29:31,334 INFO L87 Difference]: Start difference. First operand 55527 states and 99923 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:35,887 INFO L93 Difference]: Finished difference Result 70566 states and 124539 transitions. [2021-11-07 01:29:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:29:35,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:29:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:35,984 INFO L225 Difference]: With dead ends: 70566 [2021-11-07 01:29:35,984 INFO L226 Difference]: Without dead ends: 64745 [2021-11-07 01:29:35,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 316 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 01:29:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64745 states. [2021-11-07 01:29:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64745 to 55619. [2021-11-07 01:29:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55619 states, 55613 states have (on average 1.7984104436013162) internal successors, (100015), 55618 states have internal predecessors, (100015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:38,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55619 states to 55619 states and 100015 transitions. [2021-11-07 01:29:38,928 INFO L78 Accepts]: Start accepts. Automaton has 55619 states and 100015 transitions. Word has length 82 [2021-11-07 01:29:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:38,929 INFO L470 AbstractCegarLoop]: Abstraction has 55619 states and 100015 transitions. [2021-11-07 01:29:38,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 55619 states and 100015 transitions. [2021-11-07 01:29:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:29:38,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:38,945 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:38,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:39,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:39,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:39,350 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:29:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:39,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2014549068, now seen corresponding path program 1 times [2021-11-07 01:29:39,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:39,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580584900] [2021-11-07 01:29:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:39,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:39,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:39,352 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:39,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:29:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:40,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:40,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:40,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:40,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580584900] [2021-11-07 01:29:40,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580584900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:40,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443936841] [2021-11-07 01:29:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:40,939 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:40,941 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:40,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db258f4f-ae92-4ca7-8aa2-7896c205efd7/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:29:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:29:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:29:42,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:29:42,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [443936841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:42,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:29:42,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:29:42,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404678428] [2021-11-07 01:29:42,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:42,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:29:42,812 INFO L87 Difference]: Start difference. First operand 55619 states and 100015 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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)