./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product08.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_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/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_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/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_7478bf19-ff6d-472e-ba48-e22aad4f0026/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 25f377b9a54c9ee2ed75c64ae9c58ce8e9d7938b6493e908dfb7e7f7a3cef80e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:04,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:04,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:04,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:04,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:04,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:04,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:04,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:04,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:04,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:04,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:04,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:04,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:04,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:04,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:04,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:04,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:04,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:04,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:04,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:04,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:04,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:04,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:04,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:04,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:04,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:04,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:04,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:04,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:04,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:04,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:04,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:04,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:04,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:04,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:04,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:04,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:04,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:04,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:04,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:04,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:04,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:07:04,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:04,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:04,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:04,328 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:04,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:04,329 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:04,329 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:07:04,330 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:04,337 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:04,338 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:07:04,339 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:07:04,339 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:04,340 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:07:04,340 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:07:04,340 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:07:04,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:04,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:07:04,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:07:04,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:07:04,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:04,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:07:04,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:04,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:07:04,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:04,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:07:04,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:07:04,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:04,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:07:04,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:04,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:04,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:04,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:04,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:04,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:07:04,348 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:07:04,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:07:04,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:07:04,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:04,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:04,350 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_7478bf19-ff6d-472e-ba48-e22aad4f0026/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25f377b9a54c9ee2ed75c64ae9c58ce8e9d7938b6493e908dfb7e7f7a3cef80e [2021-11-07 02:07:04,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:04,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:04,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:04,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:04,717 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:04,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2021-11-07 02:07:04,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/b760b4e91/80da7e8bec584171b6cabcd6a25ff1da/FLAG5efc56eb8 [2021-11-07 02:07:05,660 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:05,661 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2021-11-07 02:07:05,702 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/b760b4e91/80da7e8bec584171b6cabcd6a25ff1da/FLAG5efc56eb8 [2021-11-07 02:07:05,798 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/b760b4e91/80da7e8bec584171b6cabcd6a25ff1da [2021-11-07 02:07:05,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:07:05,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:07:05,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:05,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:07:05,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:07:05,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:05" (1/1) ... [2021-11-07 02:07:05,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cdf0109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:05, skipping insertion in model container [2021-11-07 02:07:05,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:05" (1/1) ... [2021-11-07 02:07:05,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:07:05,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:06,647 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_7478bf19-ff6d-472e-ba48-e22aad4f0026/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c[54831,54844] [2021-11-07 02:07:06,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:06,704 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:07:06,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30697fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:06, skipping insertion in model container [2021-11-07 02:07:06,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:06,711 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:07:06,714 INFO L168 Benchmark]: Toolchain (without parser) took 904.43 ms. Allocated memory is still 121.6 MB. Free memory was 87.5 MB in the beginning and 86.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:07:06,715 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:07:06,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 897.62 ms. Allocated memory is still 121.6 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:07:06,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 897.62 ms. Allocated memory is still 121.6 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.3 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: 1729]: 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_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/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_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/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_7478bf19-ff6d-472e-ba48-e22aad4f0026/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 25f377b9a54c9ee2ed75c64ae9c58ce8e9d7938b6493e908dfb7e7f7a3cef80e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:09,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:09,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:09,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:09,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:09,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:09,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:09,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:09,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:09,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:09,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:09,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:09,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:09,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:09,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:09,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:09,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:09,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:09,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:09,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:09,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:09,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:09,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:09,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:09,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:09,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:09,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:09,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:09,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:09,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:09,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:09,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:09,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:09,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:09,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:09,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:09,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:09,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:09,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:09,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:09,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:09,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:07:09,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:09,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:09,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:09,771 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:09,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:09,772 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:09,772 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:09,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:09,773 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:09,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:09,776 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:07:09,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:07:09,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:09,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:07:09,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:09,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:07:09,777 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:09,778 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:07:09,778 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:07:09,778 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:07:09,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:07:09,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:09,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:07:09,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:09,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:07:09,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:09,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:09,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:09,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:09,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:07:09,781 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:07:09,782 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:09,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:07:09,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:09,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:09,783 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_7478bf19-ff6d-472e-ba48-e22aad4f0026/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25f377b9a54c9ee2ed75c64ae9c58ce8e9d7938b6493e908dfb7e7f7a3cef80e [2021-11-07 02:07:10,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:10,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:10,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:10,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:10,379 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:10,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2021-11-07 02:07:10,467 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/44594d17a/d5aa70d0f1494cd49260a8d59897f56f/FLAGdb1ae315c [2021-11-07 02:07:11,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:11,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c [2021-11-07 02:07:11,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/44594d17a/d5aa70d0f1494cd49260a8d59897f56f/FLAGdb1ae315c [2021-11-07 02:07:11,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/data/44594d17a/d5aa70d0f1494cd49260a8d59897f56f [2021-11-07 02:07:11,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:07:11,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:07:11,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:11,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:07:11,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:07:11,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:11" (1/1) ... [2021-11-07 02:07:11,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b383d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:11, skipping insertion in model container [2021-11-07 02:07:11,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:11" (1/1) ... [2021-11-07 02:07:11,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:07:11,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:12,457 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_7478bf19-ff6d-472e-ba48-e22aad4f0026/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c[54831,54844] [2021-11-07 02:07:12,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:12,502 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:07:12,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:12,718 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_7478bf19-ff6d-472e-ba48-e22aad4f0026/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c[54831,54844] [2021-11-07 02:07:12,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:12,740 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:07:12,870 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_7478bf19-ff6d-472e-ba48-e22aad4f0026/sv-benchmarks/c/product-lines/email_spec11_product08.cil.c[54831,54844] [2021-11-07 02:07:12,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:12,933 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:07:12,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12 WrapperNode [2021-11-07 02:07:12,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:12,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:12,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:07:12,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:07:12,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:13,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:07:13,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:07:13,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:07:13,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:07:13,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:07:13,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:07:13,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:07:13,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (1/1) ... [2021-11-07 02:07:13,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:13,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:13,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:07:13,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:07:13,389 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:07:13,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:07:13,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:07:13,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:07:13,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:07:17,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:07:17,622 INFO L299 CfgBuilder]: Removed 203 assume(true) statements. [2021-11-07 02:07:17,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:17 BoogieIcfgContainer [2021-11-07 02:07:17,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:07:17,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:07:17,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:07:17,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:07:17,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:07:11" (1/3) ... [2021-11-07 02:07:17,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:17, skipping insertion in model container [2021-11-07 02:07:17,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:12" (2/3) ... [2021-11-07 02:07:17,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:17, skipping insertion in model container [2021-11-07 02:07:17,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:17" (3/3) ... [2021-11-07 02:07:17,638 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product08.cil.c [2021-11-07 02:07:17,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:07:17,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:07:17,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:07:17,726 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:07:17,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:07:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 310 states have (on average 1.767741935483871) internal successors, (548), 312 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:07:17,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:17,774 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] [2021-11-07 02:07:17,775 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash 741947903, now seen corresponding path program 1 times [2021-11-07 02:07:17,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:17,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905319559] [2021-11-07 02:07:17,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:17,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:17,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:17,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:17,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:07:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:07:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:18,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:18,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:18,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905319559] [2021-11-07 02:07:18,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905319559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:18,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:18,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:07:18,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958101026] [2021-11-07 02:07:18,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:07:18,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:18,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:07:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:07:18,581 INFO L87 Difference]: Start difference. First operand has 313 states, 310 states have (on average 1.767741935483871) internal successors, (548), 312 states have internal predecessors, (548), 0 states have call successors, (0), 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 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:18,630 INFO L93 Difference]: Finished difference Result 384 states and 655 transitions. [2021-11-07 02:07:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:07:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-07 02:07:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:18,649 INFO L225 Difference]: With dead ends: 384 [2021-11-07 02:07:18,649 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 02:07:18,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:07:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 02:07:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2021-11-07 02:07:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 300 states have (on average 1.7533333333333334) internal successors, (526), 301 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 526 transitions. [2021-11-07 02:07:18,725 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 526 transitions. Word has length 38 [2021-11-07 02:07:18,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:18,726 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 526 transitions. [2021-11-07 02:07:18,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 526 transitions. [2021-11-07 02:07:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 02:07:18,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:18,731 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] [2021-11-07 02:07:18,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:18,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:18,948 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -358209428, now seen corresponding path program 1 times [2021-11-07 02:07:18,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:18,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916205183] [2021-11-07 02:07:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:18,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:18,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:18,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:07:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:19,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:07:19,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:19,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:19,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:19,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916205183] [2021-11-07 02:07:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916205183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:19,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:19,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:19,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760308813] [2021-11-07 02:07:19,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:19,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:19,768 INFO L87 Difference]: Start difference. First operand 302 states and 526 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:19,958 INFO L93 Difference]: Finished difference Result 876 states and 1530 transitions. [2021-11-07 02:07:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:19,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 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 39 [2021-11-07 02:07:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:19,970 INFO L225 Difference]: With dead ends: 876 [2021-11-07 02:07:19,970 INFO L226 Difference]: Without dead ends: 589 [2021-11-07 02:07:19,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:19,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-07 02:07:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 301. [2021-11-07 02:07:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 299 states have (on average 1.7424749163879598) internal successors, (521), 300 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 521 transitions. [2021-11-07 02:07:20,012 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 521 transitions. Word has length 39 [2021-11-07 02:07:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:20,013 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 521 transitions. [2021-11-07 02:07:20,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 521 transitions. [2021-11-07 02:07:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:07:20,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:20,018 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] [2021-11-07 02:07:20,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:20,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:20,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:20,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1239200594, now seen corresponding path program 1 times [2021-11-07 02:07:20,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:20,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666426725] [2021-11-07 02:07:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:20,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:20,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:20,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:20,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:07:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:07:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:20,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:20,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:20,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666426725] [2021-11-07 02:07:20,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666426725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:20,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:20,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:20,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649930866] [2021-11-07 02:07:20,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:20,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:20,981 INFO L87 Difference]: Start difference. First operand 301 states and 521 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:21,236 INFO L93 Difference]: Finished difference Result 1121 states and 1946 transitions. [2021-11-07 02:07:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:07:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:21,244 INFO L225 Difference]: With dead ends: 1121 [2021-11-07 02:07:21,245 INFO L226 Difference]: Without dead ends: 838 [2021-11-07 02:07:21,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-11-07 02:07:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 300. [2021-11-07 02:07:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 298 states have (on average 1.7348993288590604) internal successors, (517), 299 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 517 transitions. [2021-11-07 02:07:21,283 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 517 transitions. Word has length 41 [2021-11-07 02:07:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:21,283 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 517 transitions. [2021-11-07 02:07:21,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 517 transitions. [2021-11-07 02:07:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:07:21,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:21,286 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] [2021-11-07 02:07:21,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:21,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:21,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1198863013, now seen corresponding path program 1 times [2021-11-07 02:07:21,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:21,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662491390] [2021-11-07 02:07:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:21,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:21,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:21,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:07:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:07:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:22,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:22,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:22,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662491390] [2021-11-07 02:07:22,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662491390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:22,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:22,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:22,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471821182] [2021-11-07 02:07:22,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:22,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:22,349 INFO L87 Difference]: Start difference. First operand 300 states and 517 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:22,445 INFO L93 Difference]: Finished difference Result 597 states and 1031 transitions. [2021-11-07 02:07:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 02:07:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:22,449 INFO L225 Difference]: With dead ends: 597 [2021-11-07 02:07:22,450 INFO L226 Difference]: Without dead ends: 305 [2021-11-07 02:07:22,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-07 02:07:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 300. [2021-11-07 02:07:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 298 states have (on average 1.7248322147651007) internal successors, (514), 299 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 514 transitions. [2021-11-07 02:07:22,487 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 514 transitions. Word has length 42 [2021-11-07 02:07:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:22,488 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 514 transitions. [2021-11-07 02:07:22,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:22,489 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 514 transitions. [2021-11-07 02:07:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 02:07:22,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:22,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:22,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:22,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:22,710 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:22,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1645531078, now seen corresponding path program 1 times [2021-11-07 02:07:22,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:22,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349428953] [2021-11-07 02:07:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:22,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:22,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:22,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:22,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:07:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:07:23,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:23,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:23,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:23,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349428953] [2021-11-07 02:07:23,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349428953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:23,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:23,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:23,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667343945] [2021-11-07 02:07:23,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:23,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:23,501 INFO L87 Difference]: Start difference. First operand 300 states and 514 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:23,730 INFO L93 Difference]: Finished difference Result 1108 states and 1922 transitions. [2021-11-07 02:07:23,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:23,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 02:07:23,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:23,739 INFO L225 Difference]: With dead ends: 1108 [2021-11-07 02:07:23,739 INFO L226 Difference]: Without dead ends: 834 [2021-11-07 02:07:23,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-07 02:07:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 300. [2021-11-07 02:07:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 298 states have (on average 1.7147651006711409) internal successors, (511), 299 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 511 transitions. [2021-11-07 02:07:23,776 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 511 transitions. Word has length 43 [2021-11-07 02:07:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:23,777 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 511 transitions. [2021-11-07 02:07:23,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 511 transitions. [2021-11-07 02:07:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:07:23,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:23,779 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:23,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:24,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:24,001 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1056100619, now seen corresponding path program 1 times [2021-11-07 02:07:24,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:24,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943083071] [2021-11-07 02:07:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:24,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:24,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:24,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:24,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:07:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:24,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:24,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:24,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:24,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943083071] [2021-11-07 02:07:24,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943083071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:24,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:24,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:24,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022468351] [2021-11-07 02:07:24,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:24,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:24,689 INFO L87 Difference]: Start difference. First operand 300 states and 511 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:24,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:24,784 INFO L93 Difference]: Finished difference Result 634 states and 1080 transitions. [2021-11-07 02:07:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:07:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:24,790 INFO L225 Difference]: With dead ends: 634 [2021-11-07 02:07:24,790 INFO L226 Difference]: Without dead ends: 574 [2021-11-07 02:07:24,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-07 02:07:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 514. [2021-11-07 02:07:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 512 states have (on average 1.76171875) internal successors, (902), 513 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 902 transitions. [2021-11-07 02:07:24,847 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 902 transitions. Word has length 45 [2021-11-07 02:07:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:24,849 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 902 transitions. [2021-11-07 02:07:24,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 902 transitions. [2021-11-07 02:07:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:07:24,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:24,853 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:24,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:25,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:25,071 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1159430086, now seen corresponding path program 1 times [2021-11-07 02:07:25,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:25,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779597012] [2021-11-07 02:07:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:25,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:25,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:25,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:07:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:25,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:25,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:25,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:25,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779597012] [2021-11-07 02:07:25,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779597012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:25,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:25,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:25,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970911159] [2021-11-07 02:07:25,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:25,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:25,979 INFO L87 Difference]: Start difference. First operand 514 states and 902 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:26,061 INFO L93 Difference]: Finished difference Result 1166 states and 2054 transitions. [2021-11-07 02:07:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:07:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:26,067 INFO L225 Difference]: With dead ends: 1166 [2021-11-07 02:07:26,068 INFO L226 Difference]: Without dead ends: 736 [2021-11-07 02:07:26,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-11-07 02:07:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 676. [2021-11-07 02:07:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 674 states have (on average 1.774480712166172) internal successors, (1196), 675 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1196 transitions. [2021-11-07 02:07:26,153 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1196 transitions. Word has length 57 [2021-11-07 02:07:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:26,154 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1196 transitions. [2021-11-07 02:07:26,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1196 transitions. [2021-11-07 02:07:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:07:26,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:26,157 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:26,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:26,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:26,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash 173911781, now seen corresponding path program 1 times [2021-11-07 02:07:26,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:26,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650656863] [2021-11-07 02:07:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:26,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:26,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:26,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:26,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:07:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:26,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:27,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:27,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:27,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650656863] [2021-11-07 02:07:27,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650656863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:27,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:27,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:27,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135787856] [2021-11-07 02:07:27,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:27,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:27,327 INFO L87 Difference]: Start difference. First operand 676 states and 1196 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:27,458 INFO L93 Difference]: Finished difference Result 1684 states and 3001 transitions. [2021-11-07 02:07:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:27,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:07:27,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:27,474 INFO L225 Difference]: With dead ends: 1684 [2021-11-07 02:07:27,475 INFO L226 Difference]: Without dead ends: 1100 [2021-11-07 02:07:27,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-11-07 02:07:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1040. [2021-11-07 02:07:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1038 states have (on average 1.7919075144508672) internal successors, (1860), 1039 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1860 transitions. [2021-11-07 02:07:27,580 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1860 transitions. Word has length 58 [2021-11-07 02:07:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:27,580 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1860 transitions. [2021-11-07 02:07:27,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1860 transitions. [2021-11-07 02:07:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:07:27,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:27,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:27,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:27,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:27,799 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1213438348, now seen corresponding path program 1 times [2021-11-07 02:07:27,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:27,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670369821] [2021-11-07 02:07:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:27,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:27,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:27,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:07:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:28,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:28,502 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 02:07:28,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:28,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:28,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670369821] [2021-11-07 02:07:28,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670369821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:28,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:28,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:28,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267054762] [2021-11-07 02:07:28,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:28,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:28,667 INFO L87 Difference]: Start difference. First operand 1040 states and 1860 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:28,905 INFO L93 Difference]: Finished difference Result 2756 states and 4962 transitions. [2021-11-07 02:07:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:07:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:28,921 INFO L225 Difference]: With dead ends: 2756 [2021-11-07 02:07:28,922 INFO L226 Difference]: Without dead ends: 1816 [2021-11-07 02:07:28,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-11-07 02:07:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1756. [2021-11-07 02:07:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1754 states have (on average 1.8055872291904218) internal successors, (3167), 1755 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 3167 transitions. [2021-11-07 02:07:29,085 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 3167 transitions. Word has length 59 [2021-11-07 02:07:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 3167 transitions. [2021-11-07 02:07:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 3167 transitions. [2021-11-07 02:07:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:07:29,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:29,090 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 02:07:29,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:29,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:29,307 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash 354870260, now seen corresponding path program 1 times [2021-11-07 02:07:29,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:29,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135141822] [2021-11-07 02:07:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:29,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:29,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:29,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:29,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:07:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:30,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:30,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:30,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135141822] [2021-11-07 02:07:30,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135141822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:30,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:30,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:30,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064792594] [2021-11-07 02:07:30,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:30,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:30,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:30,194 INFO L87 Difference]: Start difference. First operand 1756 states and 3167 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 02:07:30,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:30,473 INFO L93 Difference]: Finished difference Result 4640 states and 8402 transitions. [2021-11-07 02:07:30,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:30,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 60 [2021-11-07 02:07:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:30,497 INFO L225 Difference]: With dead ends: 4640 [2021-11-07 02:07:30,498 INFO L226 Difference]: Without dead ends: 3018 [2021-11-07 02:07:30,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-11-07 02:07:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 2958. [2021-11-07 02:07:30,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2956 states have (on average 1.8119079837618404) internal successors, (5356), 2957 states have internal predecessors, (5356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 5356 transitions. [2021-11-07 02:07:30,858 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 5356 transitions. Word has length 60 [2021-11-07 02:07:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:30,859 INFO L470 AbstractCegarLoop]: Abstraction has 2958 states and 5356 transitions. [2021-11-07 02:07:30,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 02:07:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 5356 transitions. [2021-11-07 02:07:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:07:30,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:30,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:30,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:31,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:31,080 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:31,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1406324379, now seen corresponding path program 1 times [2021-11-07 02:07:31,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:31,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197240760] [2021-11-07 02:07:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:31,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:31,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:31,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:07:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:32,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:32,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197240760] [2021-11-07 02:07:32,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197240760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:32,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:32,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:32,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078184220] [2021-11-07 02:07:32,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:32,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:32,044 INFO L87 Difference]: Start difference. First operand 2958 states and 5356 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:32,460 INFO L93 Difference]: Finished difference Result 7962 states and 14452 transitions. [2021-11-07 02:07:32,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:32,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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 61 [2021-11-07 02:07:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:32,508 INFO L225 Difference]: With dead ends: 7962 [2021-11-07 02:07:32,508 INFO L226 Difference]: Without dead ends: 5172 [2021-11-07 02:07:32,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-11-07 02:07:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 5112. [2021-11-07 02:07:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5110 states have (on average 1.8138943248532289) internal successors, (9269), 5111 states have internal predecessors, (9269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 9269 transitions. [2021-11-07 02:07:33,002 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 9269 transitions. Word has length 61 [2021-11-07 02:07:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:33,004 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 9269 transitions. [2021-11-07 02:07:33,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 9269 transitions. [2021-11-07 02:07:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:07:33,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:33,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:33,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:33,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:33,224 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1854502341, now seen corresponding path program 1 times [2021-11-07 02:07:33,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:33,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805156263] [2021-11-07 02:07:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:33,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:33,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:33,227 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:33,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:07:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:34,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:34,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:34,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805156263] [2021-11-07 02:07:34,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805156263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:34,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:34,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:34,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99731046] [2021-11-07 02:07:34,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:34,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:34,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:34,193 INFO L87 Difference]: Start difference. First operand 5112 states and 9269 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:35,005 INFO L93 Difference]: Finished difference Result 14882 states and 27033 transitions. [2021-11-07 02:07:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:07:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:35,102 INFO L225 Difference]: With dead ends: 14882 [2021-11-07 02:07:35,102 INFO L226 Difference]: Without dead ends: 9942 [2021-11-07 02:07:35,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9942 states. [2021-11-07 02:07:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9942 to 9882. [2021-11-07 02:07:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9882 states, 9880 states have (on average 1.8143724696356276) internal successors, (17926), 9881 states have internal predecessors, (17926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9882 states to 9882 states and 17926 transitions. [2021-11-07 02:07:36,049 INFO L78 Accepts]: Start accepts. Automaton has 9882 states and 17926 transitions. Word has length 62 [2021-11-07 02:07:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:36,049 INFO L470 AbstractCegarLoop]: Abstraction has 9882 states and 17926 transitions. [2021-11-07 02:07:36,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 9882 states and 17926 transitions. [2021-11-07 02:07:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:07:36,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:36,063 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:36,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:36,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:36,280 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:36,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1061571989, now seen corresponding path program 1 times [2021-11-07 02:07:36,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:36,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484729597] [2021-11-07 02:07:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:36,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:36,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:36,284 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:36,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:07:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:36,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:37,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:37,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:37,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484729597] [2021-11-07 02:07:37,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484729597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:37,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:37,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:37,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048717672] [2021-11-07 02:07:37,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:37,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:37,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:37,377 INFO L87 Difference]: Start difference. First operand 9882 states and 17926 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:40,654 INFO L93 Difference]: Finished difference Result 24277 states and 44057 transitions. [2021-11-07 02:07:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:07:40,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:07:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:40,703 INFO L225 Difference]: With dead ends: 24277 [2021-11-07 02:07:40,704 INFO L226 Difference]: Without dead ends: 14645 [2021-11-07 02:07:40,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:07:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14645 states. [2021-11-07 02:07:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14645 to 9849. [2021-11-07 02:07:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9847 states have (on average 1.8070478318269523) internal successors, (17794), 9848 states have internal predecessors, (17794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 17794 transitions. [2021-11-07 02:07:41,634 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 17794 transitions. Word has length 63 [2021-11-07 02:07:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:41,634 INFO L470 AbstractCegarLoop]: Abstraction has 9849 states and 17794 transitions. [2021-11-07 02:07:41,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 17794 transitions. [2021-11-07 02:07:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:07:41,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:41,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:41,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:41,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:41,861 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1182195820, now seen corresponding path program 1 times [2021-11-07 02:07:41,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:41,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848199351] [2021-11-07 02:07:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:41,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:41,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:41,863 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:41,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:07:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:42,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:43,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:43,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848199351] [2021-11-07 02:07:43,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848199351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:43,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:43,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:43,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347789628] [2021-11-07 02:07:43,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:43,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:43,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:43,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:43,095 INFO L87 Difference]: Start difference. First operand 9849 states and 17794 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:44,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:44,304 INFO L93 Difference]: Finished difference Result 28797 states and 52091 transitions. [2021-11-07 02:07:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:44,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:07:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:44,370 INFO L225 Difference]: With dead ends: 28797 [2021-11-07 02:07:44,371 INFO L226 Difference]: Without dead ends: 19127 [2021-11-07 02:07:44,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19127 states. [2021-11-07 02:07:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19127 to 19067. [2021-11-07 02:07:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19067 states, 19065 states have (on average 1.8061893522161028) internal successors, (34435), 19066 states have internal predecessors, (34435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19067 states to 19067 states and 34435 transitions. [2021-11-07 02:07:45,763 INFO L78 Accepts]: Start accepts. Automaton has 19067 states and 34435 transitions. Word has length 63 [2021-11-07 02:07:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:45,763 INFO L470 AbstractCegarLoop]: Abstraction has 19067 states and 34435 transitions. [2021-11-07 02:07:45,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19067 states and 34435 transitions. [2021-11-07 02:07:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:07:45,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:45,771 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:45,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:45,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:45,992 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2036943097, now seen corresponding path program 1 times [2021-11-07 02:07:45,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:45,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422114115] [2021-11-07 02:07:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:45,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:45,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:45,994 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:45,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:07:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:46,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:46,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:47,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:47,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422114115] [2021-11-07 02:07:47,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422114115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:47,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:47,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:47,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548095177] [2021-11-07 02:07:47,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:47,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:47,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:47,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:47,077 INFO L87 Difference]: Start difference. First operand 19067 states and 34435 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:48,795 INFO L93 Difference]: Finished difference Result 56637 states and 102328 transitions. [2021-11-07 02:07:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:48,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:07:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:48,910 INFO L225 Difference]: With dead ends: 56637 [2021-11-07 02:07:48,910 INFO L226 Difference]: Without dead ends: 37753 [2021-11-07 02:07:48,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37753 states. [2021-11-07 02:07:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37753 to 37693. [2021-11-07 02:07:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37693 states, 37691 states have (on average 1.803401342495556) internal successors, (67972), 37692 states have internal predecessors, (67972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37693 states to 37693 states and 67972 transitions. [2021-11-07 02:07:51,536 INFO L78 Accepts]: Start accepts. Automaton has 37693 states and 67972 transitions. Word has length 64 [2021-11-07 02:07:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:51,537 INFO L470 AbstractCegarLoop]: Abstraction has 37693 states and 67972 transitions. [2021-11-07 02:07:51,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 37693 states and 67972 transitions. [2021-11-07 02:07:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:07:51,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:51,545 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] [2021-11-07 02:07:51,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:51,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:51,760 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1652780325, now seen corresponding path program 1 times [2021-11-07 02:07:51,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:51,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195055215] [2021-11-07 02:07:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:51,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:51,762 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:51,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:07:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:52,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:52,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:52,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195055215] [2021-11-07 02:07:52,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195055215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:52,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:52,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:52,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009166384] [2021-11-07 02:07:52,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:52,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:52,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:52,969 INFO L87 Difference]: Start difference. First operand 37693 states and 67972 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:00,489 INFO L93 Difference]: Finished difference Result 146181 states and 263456 transitions. [2021-11-07 02:08:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:08:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:08:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:00,800 INFO L225 Difference]: With dead ends: 146181 [2021-11-07 02:08:00,800 INFO L226 Difference]: Without dead ends: 108737 [2021-11-07 02:08:00,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 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 02:08:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108737 states. [2021-11-07 02:08:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108737 to 37435. [2021-11-07 02:08:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37435 states, 37433 states have (on average 1.7882616942270189) internal successors, (66940), 37434 states have internal predecessors, (66940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37435 states to 37435 states and 66940 transitions. [2021-11-07 02:08:04,436 INFO L78 Accepts]: Start accepts. Automaton has 37435 states and 66940 transitions. Word has length 65 [2021-11-07 02:08:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:04,437 INFO L470 AbstractCegarLoop]: Abstraction has 37435 states and 66940 transitions. [2021-11-07 02:08:04,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 37435 states and 66940 transitions. [2021-11-07 02:08:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:08:04,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:04,445 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:04,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:04,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:04,660 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1964722695, now seen corresponding path program 1 times [2021-11-07 02:08:04,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:04,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578320861] [2021-11-07 02:08:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:04,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:04,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:04,662 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:04,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:08:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:05,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:05,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:05,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:05,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578320861] [2021-11-07 02:08:05,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578320861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:05,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:05,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:08:05,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859748656] [2021-11-07 02:08:05,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:08:05,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:08:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:05,925 INFO L87 Difference]: Start difference. First operand 37435 states and 66940 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 02:08:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:08,076 INFO L93 Difference]: Finished difference Result 74675 states and 133548 transitions. [2021-11-07 02:08:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:08,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 65 [2021-11-07 02:08:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:08,148 INFO L225 Difference]: With dead ends: 74675 [2021-11-07 02:08:08,148 INFO L226 Difference]: Without dead ends: 37495 [2021-11-07 02:08:08,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:08:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37495 states. [2021-11-07 02:08:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37495 to 37435. [2021-11-07 02:08:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37435 states, 37433 states have (on average 1.7848422514893276) internal successors, (66812), 37434 states have internal predecessors, (66812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37435 states to 37435 states and 66812 transitions. [2021-11-07 02:08:10,674 INFO L78 Accepts]: Start accepts. Automaton has 37435 states and 66812 transitions. Word has length 65 [2021-11-07 02:08:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:10,674 INFO L470 AbstractCegarLoop]: Abstraction has 37435 states and 66812 transitions. [2021-11-07 02:08:10,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 02:08:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37435 states and 66812 transitions. [2021-11-07 02:08:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:08:10,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:10,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:10,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:10,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:10,883 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash -704997786, now seen corresponding path program 1 times [2021-11-07 02:08:10,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:10,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728638789] [2021-11-07 02:08:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:10,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:10,885 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:10,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:08:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:08:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:11,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:12,051 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:12,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728638789] [2021-11-07 02:08:12,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728638789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:12,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:12,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:08:12,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997755690] [2021-11-07 02:08:12,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:08:12,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:08:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:08:12,057 INFO L87 Difference]: Start difference. First operand 37435 states and 66812 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:15,967 INFO L93 Difference]: Finished difference Result 103901 states and 185078 transitions. [2021-11-07 02:08:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:08:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:16,093 INFO L225 Difference]: With dead ends: 103901 [2021-11-07 02:08:16,093 INFO L226 Difference]: Without dead ends: 66681 [2021-11-07 02:08:16,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:08:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66681 states. [2021-11-07 02:08:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66681 to 66621. [2021-11-07 02:08:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66621 states, 66619 states have (on average 1.7753043426049626) internal successors, (118269), 66620 states have internal predecessors, (118269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66621 states to 66621 states and 118269 transitions. [2021-11-07 02:08:20,928 INFO L78 Accepts]: Start accepts. Automaton has 66621 states and 118269 transitions. Word has length 65 [2021-11-07 02:08:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:20,928 INFO L470 AbstractCegarLoop]: Abstraction has 66621 states and 118269 transitions. [2021-11-07 02:08:20,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 66621 states and 118269 transitions. [2021-11-07 02:08:20,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:08:20,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:20,935 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] [2021-11-07 02:08:20,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:21,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:21,163 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash 301605695, now seen corresponding path program 1 times [2021-11-07 02:08:21,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:21,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449582471] [2021-11-07 02:08:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:21,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:21,165 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:21,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:08:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:21,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:22,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:22,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:22,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449582471] [2021-11-07 02:08:22,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449582471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:22,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1925817255] [2021-11-07 02:08:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:22,514 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:22,517 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:22,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478bf19-ff6d-472e-ba48-e22aad4f0026/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:08:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 02:08:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:08:23,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:08:24,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1925817255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:24,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:24,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 02:08:24,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009367489] [2021-11-07 02:08:24,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:08:24,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:08:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:08:24,363 INFO L87 Difference]: Start difference. First operand 66621 states and 118269 transitions. Second operand has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)