./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.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_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/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_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/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_9af0d01d-b38a-45bd-a674-e93f1a675618/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 f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:19:14,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:19:14,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:19:14,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:19:14,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:19:14,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:19:14,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:19:14,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:19:14,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:19:14,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:19:14,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:19:14,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:19:14,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:19:14,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:19:14,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:19:14,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:19:14,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:19:14,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:19:14,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:19:15,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:19:15,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:19:15,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:19:15,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:19:15,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:19:15,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:19:15,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:19:15,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:19:15,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:19:15,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:19:15,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:19:15,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:19:15,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:19:15,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:19:15,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:19:15,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:19:15,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:19:15,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:19:15,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:19:15,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:19:15,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:19:15,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:19:15,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:19:15,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:19:15,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:19:15,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:19:15,097 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:19:15,098 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:19:15,098 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:19:15,098 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:19:15,098 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:19:15,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:19:15,107 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:19:15,108 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:19:15,109 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:19:15,109 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:19:15,110 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:19:15,110 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:19:15,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:19:15,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:19:15,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:19:15,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:19:15,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:19:15,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:19:15,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:19:15,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:19:15,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:19:15,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:19:15,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:19:15,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:19:15,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:19:15,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:19:15,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:19:15,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:15,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:19:15,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:19:15,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:19:15,118 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:19:15,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:19:15,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:19:15,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:19:15,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:19:15,120 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_9af0d01d-b38a-45bd-a674-e93f1a675618/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 [2021-11-07 02:19:15,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:19:15,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:19:15,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:19:15,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:19:15,517 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:19:15,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-07 02:19:15,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/ffa4a4d84/e625c88232f84b38859630ebf2510c91/FLAG12c47bc71 [2021-11-07 02:19:16,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:19:16,530 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-07 02:19:16,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/ffa4a4d84/e625c88232f84b38859630ebf2510c91/FLAG12c47bc71 [2021-11-07 02:19:16,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/ffa4a4d84/e625c88232f84b38859630ebf2510c91 [2021-11-07 02:19:16,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:19:16,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:19:16,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:16,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:19:16,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:19:16,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:16" (1/1) ... [2021-11-07 02:19:16,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a75f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:16, skipping insertion in model container [2021-11-07 02:19:16,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:16" (1/1) ... [2021-11-07 02:19:16,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:19:16,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:17,108 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_9af0d01d-b38a-45bd-a674-e93f1a675618/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-07 02:19:17,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:17,570 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 02:19:17,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21fe0f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:17, skipping insertion in model container [2021-11-07 02:19:17,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:17,572 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:19:17,575 INFO L168 Benchmark]: Toolchain (without parser) took 934.58 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 79.2 MB in the end (delta: -554.5 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:19:17,575 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 119.5 MB. Free memory is still 97.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:19:17,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 931.04 ms. Allocated memory is still 119.5 MB. Free memory was 78.4 MB in the beginning and 79.2 MB in the end (delta: -780.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:19:17,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 119.5 MB. Free memory is still 97.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 931.04 ms. Allocated memory is still 119.5 MB. Free memory was 78.4 MB in the beginning and 79.2 MB in the end (delta: -780.9 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2996]: 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_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/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_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/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_9af0d01d-b38a-45bd-a674-e93f1a675618/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 f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:19:20,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:19:20,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:19:20,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:19:20,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:19:20,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:19:20,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:19:20,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:19:20,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:19:20,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:19:20,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:19:20,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:19:20,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:19:20,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:19:20,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:19:20,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:19:20,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:19:20,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:19:20,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:19:20,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:19:20,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:19:20,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:19:20,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:19:20,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:19:20,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:19:20,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:19:20,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:19:20,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:19:20,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:19:20,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:19:20,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:19:20,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:19:20,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:19:20,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:19:20,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:19:20,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:19:20,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:19:20,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:19:20,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:19:20,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:19:20,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:19:20,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:19:20,560 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:19:20,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:19:20,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:19:20,562 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:19:20,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:19:20,563 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:19:20,563 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:19:20,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:19:20,564 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:19:20,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:19:20,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:19:20,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:19:20,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:19:20,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:19:20,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:19:20,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:19:20,569 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:19:20,569 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:19:20,570 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:19:20,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:19:20,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:19:20,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:19:20,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:19:20,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:19:20,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:19:20,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:19:20,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:20,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:19:20,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:19:20,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:19:20,573 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:19:20,574 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:20,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:19:20,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:19:20,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:19:20,575 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_9af0d01d-b38a-45bd-a674-e93f1a675618/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 [2021-11-07 02:19:21,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:19:21,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:19:21,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:19:21,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:19:21,111 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:19:21,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-07 02:19:21,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/f0a1b2ef2/2a6bd1387bd94677bb3f7d3e2d595ee0/FLAG746d251df [2021-11-07 02:19:22,189 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:19:22,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-07 02:19:22,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/f0a1b2ef2/2a6bd1387bd94677bb3f7d3e2d595ee0/FLAG746d251df [2021-11-07 02:19:22,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/data/f0a1b2ef2/2a6bd1387bd94677bb3f7d3e2d595ee0 [2021-11-07 02:19:22,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:19:22,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:19:22,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:22,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:19:22,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:19:22,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:22" (1/1) ... [2021-11-07 02:19:22,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ef3f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:22, skipping insertion in model container [2021-11-07 02:19:22,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:19:22" (1/1) ... [2021-11-07 02:19:22,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:19:22,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:23,361 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_9af0d01d-b38a-45bd-a674-e93f1a675618/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-07 02:19:23,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:23,802 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:19:23,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:19:23,864 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_9af0d01d-b38a-45bd-a674-e93f1a675618/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-07 02:19:23,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:23,990 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:19:24,023 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_9af0d01d-b38a-45bd-a674-e93f1a675618/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-07 02:19:24,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:19:24,194 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:19:24,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24 WrapperNode [2021-11-07 02:19:24,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:19:24,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:19:24,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:19:24,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:19:24,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:19:24,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:19:24,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:19:24,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:19:24,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:19:24,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:19:24,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:19:24,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:19:24,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (1/1) ... [2021-11-07 02:19:24,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:19:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:19:24,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:19:24,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:19:24,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:19:24,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:19:24,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:19:24,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:19:34,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:19:34,771 INFO L299 CfgBuilder]: Removed 553 assume(true) statements. [2021-11-07 02:19:34,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:19:34 BoogieIcfgContainer [2021-11-07 02:19:34,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:19:34,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:19:34,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:19:34,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:19:34,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:19:22" (1/3) ... [2021-11-07 02:19:34,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e87045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:19:34, skipping insertion in model container [2021-11-07 02:19:34,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:19:24" (2/3) ... [2021-11-07 02:19:34,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e87045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:19:34, skipping insertion in model container [2021-11-07 02:19:34,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:19:34" (3/3) ... [2021-11-07 02:19:34,794 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product17.cil.c [2021-11-07 02:19:34,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:19:34,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:19:34,885 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:19:34,898 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 02:19:34,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:19:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 2404 states, 2398 states have (on average 1.8953294412010009) internal successors, (4545), 2403 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:19:35,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:35,030 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 02:19:35,031 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:35,038 INFO L85 PathProgramCache]: Analyzing trace with hash 873437399, now seen corresponding path program 1 times [2021-11-07 02:19:35,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:35,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734495033] [2021-11-07 02:19:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:35,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:35,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:35,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:19:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:35,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:19:35,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:35,694 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 02:19:35,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:35,798 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 02:19:35,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:35,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734495033] [2021-11-07 02:19:35,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734495033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:35,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:35,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:19:35,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380915159] [2021-11-07 02:19:35,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:19:35,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:19:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:19:35,843 INFO L87 Difference]: Start difference. First operand has 2404 states, 2398 states have (on average 1.8953294412010009) internal successors, (4545), 2403 states have internal predecessors, (4545), 0 states have call successors, (0), 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 02:19:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:35,992 INFO L93 Difference]: Finished difference Result 2423 states and 4568 transitions. [2021-11-07 02:19:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:19:35,994 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 02:19:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:36,032 INFO L225 Difference]: With dead ends: 2423 [2021-11-07 02:19:36,032 INFO L226 Difference]: Without dead ends: 2400 [2021-11-07 02:19:36,038 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 02:19:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-11-07 02:19:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2021-11-07 02:19:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2395 states have (on average 1.8926931106471816) internal successors, (4533), 2399 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 4533 transitions. [2021-11-07 02:19:36,324 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 4533 transitions. Word has length 38 [2021-11-07 02:19:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:36,325 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 4533 transitions. [2021-11-07 02:19:36,325 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 02:19:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 4533 transitions. [2021-11-07 02:19:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:19:36,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:36,330 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] [2021-11-07 02:19:36,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:19:36,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:36,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1680581318, now seen corresponding path program 1 times [2021-11-07 02:19:36,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:36,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492766742] [2021-11-07 02:19:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:36,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:36,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:36,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:36,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:19:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:36,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:19:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:37,106 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 02:19:37,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:37,295 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 02:19:37,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:37,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492766742] [2021-11-07 02:19:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492766742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:37,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:37,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389373016] [2021-11-07 02:19:37,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:37,300 INFO L87 Difference]: Start difference. First operand 2400 states and 4533 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:37,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:37,489 INFO L93 Difference]: Finished difference Result 4787 states and 9047 transitions. [2021-11-07 02:19:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 40 [2021-11-07 02:19:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:37,510 INFO L225 Difference]: With dead ends: 4787 [2021-11-07 02:19:37,511 INFO L226 Difference]: Without dead ends: 2400 [2021-11-07 02:19:37,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 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 02:19:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-11-07 02:19:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2400. [2021-11-07 02:19:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2395 states have (on average 1.890187891440501) internal successors, (4527), 2399 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 4527 transitions. [2021-11-07 02:19:37,628 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 4527 transitions. Word has length 40 [2021-11-07 02:19:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:37,628 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 4527 transitions. [2021-11-07 02:19:37,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 4527 transitions. [2021-11-07 02:19:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:19:37,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:37,633 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 02:19:37,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:37,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:37,846 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:37,847 INFO L85 PathProgramCache]: Analyzing trace with hash 516083280, now seen corresponding path program 1 times [2021-11-07 02:19:37,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:37,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988644653] [2021-11-07 02:19:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:37,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:37,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:37,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:37,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:19:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:19:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:38,569 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 02:19:38,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:38,747 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 02:19:38,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:38,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988644653] [2021-11-07 02:19:38,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988644653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:38,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:38,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:19:38,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927661010] [2021-11-07 02:19:38,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:19:38,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:19:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:38,751 INFO L87 Difference]: Start difference. First operand 2400 states and 4527 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 02:19:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:38,987 INFO L93 Difference]: Finished difference Result 4751 states and 8970 transitions. [2021-11-07 02:19:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 02:19:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:39,007 INFO L225 Difference]: With dead ends: 4751 [2021-11-07 02:19:39,008 INFO L226 Difference]: Without dead ends: 2373 [2021-11-07 02:19:39,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 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 02:19:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-11-07 02:19:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2373. [2021-11-07 02:19:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2368 states have (on average 1.8880912162162162) internal successors, (4471), 2372 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4471 transitions. [2021-11-07 02:19:39,181 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4471 transitions. Word has length 45 [2021-11-07 02:19:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:39,182 INFO L470 AbstractCegarLoop]: Abstraction has 2373 states and 4471 transitions. [2021-11-07 02:19:39,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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 02:19:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4471 transitions. [2021-11-07 02:19:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:19:39,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:39,189 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:39,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:39,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:39,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1558658418, now seen corresponding path program 1 times [2021-11-07 02:19:39,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:39,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208038493] [2021-11-07 02:19:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:39,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:39,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:39,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:19:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:19:39,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:40,044 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 02:19:40,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:40,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:40,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208038493] [2021-11-07 02:19:40,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208038493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:40,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:40,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616439965] [2021-11-07 02:19:40,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:40,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:40,235 INFO L87 Difference]: Start difference. First operand 2373 states and 4471 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:40,429 INFO L93 Difference]: Finished difference Result 4724 states and 8914 transitions. [2021-11-07 02:19:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:40,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:19:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:40,451 INFO L225 Difference]: With dead ends: 4724 [2021-11-07 02:19:40,451 INFO L226 Difference]: Without dead ends: 2373 [2021-11-07 02:19:40,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 02:19:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-11-07 02:19:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2373. [2021-11-07 02:19:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2368 states have (on average 1.8855574324324325) internal successors, (4465), 2372 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4465 transitions. [2021-11-07 02:19:40,597 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4465 transitions. Word has length 46 [2021-11-07 02:19:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:40,598 INFO L470 AbstractCegarLoop]: Abstraction has 2373 states and 4465 transitions. [2021-11-07 02:19:40,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:40,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4465 transitions. [2021-11-07 02:19:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:19:40,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:40,602 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] [2021-11-07 02:19:40,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:40,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:40,820 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash -940693181, now seen corresponding path program 1 times [2021-11-07 02:19:40,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:40,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869275900] [2021-11-07 02:19:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:40,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:40,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:40,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:40,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:19:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:19:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:41,555 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 02:19:41,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:41,762 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 02:19:41,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:41,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869275900] [2021-11-07 02:19:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869275900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:41,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:41,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:19:41,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123109470] [2021-11-07 02:19:41,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:41,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:41,766 INFO L87 Difference]: Start difference. First operand 2373 states and 4465 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 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 02:19:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:42,134 INFO L93 Difference]: Finished difference Result 4718 states and 8897 transitions. [2021-11-07 02:19:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 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 51 [2021-11-07 02:19:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:42,154 INFO L225 Difference]: With dead ends: 4718 [2021-11-07 02:19:42,154 INFO L226 Difference]: Without dead ends: 2370 [2021-11-07 02:19:42,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-11-07 02:19:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2370. [2021-11-07 02:19:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2365 states have (on average 1.884566596194503) internal successors, (4457), 2369 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 4457 transitions. [2021-11-07 02:19:42,290 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 4457 transitions. Word has length 51 [2021-11-07 02:19:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:42,291 INFO L470 AbstractCegarLoop]: Abstraction has 2370 states and 4457 transitions. [2021-11-07 02:19:42,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 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 02:19:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 4457 transitions. [2021-11-07 02:19:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:19:42,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:42,296 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] [2021-11-07 02:19:42,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:42,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:42,510 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2046798611, now seen corresponding path program 1 times [2021-11-07 02:19:42,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:42,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712430913] [2021-11-07 02:19:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:42,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:42,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:42,515 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:42,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:19:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:19:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:43,328 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 02:19:43,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:43,532 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 02:19:43,532 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:43,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712430913] [2021-11-07 02:19:43,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712430913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:43,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:43,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:19:43,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498030810] [2021-11-07 02:19:43,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:43,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:43,535 INFO L87 Difference]: Start difference. First operand 2370 states and 4457 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:45,957 INFO L93 Difference]: Finished difference Result 9536 states and 17925 transitions. [2021-11-07 02:19:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:19:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-07 02:19:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:46,015 INFO L225 Difference]: With dead ends: 9536 [2021-11-07 02:19:46,015 INFO L226 Difference]: Without dead ends: 7206 [2021-11-07 02:19:46,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7206 states. [2021-11-07 02:19:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7206 to 2374. [2021-11-07 02:19:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 2369 states have (on average 1.8830730265934994) internal successors, (4461), 2373 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 4461 transitions. [2021-11-07 02:19:46,223 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 4461 transitions. Word has length 52 [2021-11-07 02:19:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:46,224 INFO L470 AbstractCegarLoop]: Abstraction has 2374 states and 4461 transitions. [2021-11-07 02:19:46,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 4461 transitions. [2021-11-07 02:19:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:19:46,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:46,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:46,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:19:46,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:46,445 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1857474613, now seen corresponding path program 1 times [2021-11-07 02:19:46,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:46,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737454996] [2021-11-07 02:19:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:46,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:46,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:46,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:46,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:19:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:47,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:47,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:47,415 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 02:19:47,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:47,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737454996] [2021-11-07 02:19:47,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737454996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:47,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:47,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:19:47,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995364176] [2021-11-07 02:19:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:47,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:47,418 INFO L87 Difference]: Start difference. First operand 2374 states and 4461 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:52,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:52,899 INFO L93 Difference]: Finished difference Result 6459 states and 12088 transitions. [2021-11-07 02:19:52,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:19:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 02:19:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:52,955 INFO L225 Difference]: With dead ends: 6459 [2021-11-07 02:19:52,955 INFO L226 Difference]: Without dead ends: 5083 [2021-11-07 02:19:52,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-11-07 02:19:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 4392. [2021-11-07 02:19:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4387 states have (on average 1.8857989514474585) internal successors, (8273), 4391 states have internal predecessors, (8273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 8273 transitions. [2021-11-07 02:19:53,347 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 8273 transitions. Word has length 53 [2021-11-07 02:19:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:53,350 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 8273 transitions. [2021-11-07 02:19:53,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 8273 transitions. [2021-11-07 02:19:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:19:53,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:53,355 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:53,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:53,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:53,574 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 124803919, now seen corresponding path program 1 times [2021-11-07 02:19:53,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:53,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492718704] [2021-11-07 02:19:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:53,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:53,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:53,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:19:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:54,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:54,367 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 02:19:54,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:54,573 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 02:19:54,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:54,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492718704] [2021-11-07 02:19:54,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492718704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:54,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:54,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:19:54,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199990186] [2021-11-07 02:19:54,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:54,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:54,576 INFO L87 Difference]: Start difference. First operand 4392 states and 8273 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:56,738 INFO L93 Difference]: Finished difference Result 8246 states and 15426 transitions. [2021-11-07 02:19:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:19:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:19:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:56,755 INFO L225 Difference]: With dead ends: 8246 [2021-11-07 02:19:56,755 INFO L226 Difference]: Without dead ends: 4844 [2021-11-07 02:19:56,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-11-07 02:19:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4295. [2021-11-07 02:19:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4290 states have (on average 1.8692307692307693) internal successors, (8019), 4294 states have internal predecessors, (8019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 8019 transitions. [2021-11-07 02:19:57,004 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 8019 transitions. Word has length 54 [2021-11-07 02:19:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:57,004 INFO L470 AbstractCegarLoop]: Abstraction has 4295 states and 8019 transitions. [2021-11-07 02:19:57,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 8019 transitions. [2021-11-07 02:19:57,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:19:57,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:57,007 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:57,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:57,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:57,225 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:19:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1635000845, now seen corresponding path program 1 times [2021-11-07 02:19:57,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:57,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696018148] [2021-11-07 02:19:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:57,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:57,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:57,230 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:57,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:19:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:19:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:58,073 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 02:19:58,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:58,301 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 02:19:58,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:58,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696018148] [2021-11-07 02:19:58,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696018148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:58,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:58,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:19:58,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774727715] [2021-11-07 02:19:58,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:19:58,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:19:58,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:19:58,304 INFO L87 Difference]: Start difference. First operand 4295 states and 8019 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:59,946 INFO L93 Difference]: Finished difference Result 30691 states and 57520 transitions. [2021-11-07 02:19:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:19:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:19:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:00,047 INFO L225 Difference]: With dead ends: 30691 [2021-11-07 02:20:00,047 INFO L226 Difference]: Without dead ends: 26432 [2021-11-07 02:20:00,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:20:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26432 states. [2021-11-07 02:20:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26432 to 8063. [2021-11-07 02:20:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8063 states, 8058 states have (on average 1.873541821792008) internal successors, (15097), 8062 states have internal predecessors, (15097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8063 states to 8063 states and 15097 transitions. [2021-11-07 02:20:00,739 INFO L78 Accepts]: Start accepts. Automaton has 8063 states and 15097 transitions. Word has length 55 [2021-11-07 02:20:00,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:00,739 INFO L470 AbstractCegarLoop]: Abstraction has 8063 states and 15097 transitions. [2021-11-07 02:20:00,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:00,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8063 states and 15097 transitions. [2021-11-07 02:20:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:20:00,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:00,742 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:00,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:00,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:00,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:00,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1769014351, now seen corresponding path program 1 times [2021-11-07 02:20:00,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:00,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535685638] [2021-11-07 02:20:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:00,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:00,966 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:01,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:20:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:01,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:01,790 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 02:20:01,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:01,987 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 02:20:01,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:01,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535685638] [2021-11-07 02:20:01,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535685638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:01,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:01,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:01,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608042096] [2021-11-07 02:20:01,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:01,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:01,990 INFO L87 Difference]: Start difference. First operand 8063 states and 15097 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:03,177 INFO L93 Difference]: Finished difference Result 24408 states and 45743 transitions. [2021-11-07 02:20:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:20:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:03,243 INFO L225 Difference]: With dead ends: 24408 [2021-11-07 02:20:03,244 INFO L226 Difference]: Without dead ends: 19804 [2021-11-07 02:20:03,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19804 states. [2021-11-07 02:20:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19804 to 12398. [2021-11-07 02:20:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12398 states, 12393 states have (on average 1.8740417977890744) internal successors, (23225), 12397 states have internal predecessors, (23225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12398 states to 12398 states and 23225 transitions. [2021-11-07 02:20:04,095 INFO L78 Accepts]: Start accepts. Automaton has 12398 states and 23225 transitions. Word has length 55 [2021-11-07 02:20:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:04,095 INFO L470 AbstractCegarLoop]: Abstraction has 12398 states and 23225 transitions. [2021-11-07 02:20:04,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 12398 states and 23225 transitions. [2021-11-07 02:20:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:20:04,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:04,098 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 02:20:04,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:04,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:04,315 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1226760773, now seen corresponding path program 1 times [2021-11-07 02:20:04,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:04,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030131896] [2021-11-07 02:20:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:04,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:04,319 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:04,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:20:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:04,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:20:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:05,238 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 02:20:05,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:05,480 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 02:20:05,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:05,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030131896] [2021-11-07 02:20:05,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030131896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:05,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:05,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:20:05,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64034231] [2021-11-07 02:20:05,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:05,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:05,483 INFO L87 Difference]: Start difference. First operand 12398 states and 23225 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:09,180 INFO L93 Difference]: Finished difference Result 66994 states and 125819 transitions. [2021-11-07 02:20:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:20:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 02:20:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:09,364 INFO L225 Difference]: With dead ends: 66994 [2021-11-07 02:20:09,364 INFO L226 Difference]: Without dead ends: 58055 [2021-11-07 02:20:09,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:20:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58055 states. [2021-11-07 02:20:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58055 to 19846. [2021-11-07 02:20:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19846 states, 19841 states have (on average 1.8763167179073634) internal successors, (37228), 19845 states have internal predecessors, (37228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19846 states to 19846 states and 37228 transitions. [2021-11-07 02:20:10,837 INFO L78 Accepts]: Start accepts. Automaton has 19846 states and 37228 transitions. Word has length 57 [2021-11-07 02:20:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:10,838 INFO L470 AbstractCegarLoop]: Abstraction has 19846 states and 37228 transitions. [2021-11-07 02:20:10,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 19846 states and 37228 transitions. [2021-11-07 02:20:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:20:10,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:10,842 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 02:20:10,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:11,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:11,060 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1739124632, now seen corresponding path program 1 times [2021-11-07 02:20:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:11,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861805063] [2021-11-07 02:20:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:11,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:11,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:11,062 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:11,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:20:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:11,815 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 02:20:11,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:11,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:11,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861805063] [2021-11-07 02:20:11,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861805063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:11,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:11,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:11,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301409288] [2021-11-07 02:20:11,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:11,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:11,951 INFO L87 Difference]: Start difference. First operand 19846 states and 37228 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:13,952 INFO L93 Difference]: Finished difference Result 47924 states and 89527 transitions. [2021-11-07 02:20:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:13,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:20:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:14,025 INFO L225 Difference]: With dead ends: 47924 [2021-11-07 02:20:14,025 INFO L226 Difference]: Without dead ends: 29595 [2021-11-07 02:20:14,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29595 states. [2021-11-07 02:20:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29595 to 19723. [2021-11-07 02:20:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19723 states, 19718 states have (on average 1.8652500253575413) internal successors, (36779), 19722 states have internal predecessors, (36779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19723 states to 19723 states and 36779 transitions. [2021-11-07 02:20:15,299 INFO L78 Accepts]: Start accepts. Automaton has 19723 states and 36779 transitions. Word has length 64 [2021-11-07 02:20:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:15,299 INFO L470 AbstractCegarLoop]: Abstraction has 19723 states and 36779 transitions. [2021-11-07 02:20:15,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 19723 states and 36779 transitions. [2021-11-07 02:20:15,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:20:15,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:15,303 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 02:20:15,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:20:15,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:15,521 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1661413589, now seen corresponding path program 1 times [2021-11-07 02:20:15,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:15,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705320376] [2021-11-07 02:20:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:15,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:15,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:15,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:20:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:16,363 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 02:20:16,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:16,520 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 02:20:16,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:16,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705320376] [2021-11-07 02:20:16,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705320376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:16,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:16,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:20:16,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341577820] [2021-11-07 02:20:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:16,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:16,524 INFO L87 Difference]: Start difference. First operand 19723 states and 36779 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 02:20:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:17,443 INFO L93 Difference]: Finished difference Result 36131 states and 67319 transitions. [2021-11-07 02:20:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:17,443 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 64 [2021-11-07 02:20:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:17,471 INFO L225 Difference]: With dead ends: 36131 [2021-11-07 02:20:17,471 INFO L226 Difference]: Without dead ends: 19738 [2021-11-07 02:20:17,485 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19738 states. [2021-11-07 02:20:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19738 to 19723. [2021-11-07 02:20:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19723 states, 19718 states have (on average 1.8580484836190283) internal successors, (36637), 19722 states have internal predecessors, (36637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19723 states to 19723 states and 36637 transitions. [2021-11-07 02:20:18,639 INFO L78 Accepts]: Start accepts. Automaton has 19723 states and 36637 transitions. Word has length 64 [2021-11-07 02:20:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:18,639 INFO L470 AbstractCegarLoop]: Abstraction has 19723 states and 36637 transitions. [2021-11-07 02:20:18,640 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 02:20:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19723 states and 36637 transitions. [2021-11-07 02:20:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:20:18,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:18,644 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 02:20:18,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:20:18,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,854 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash -504594538, now seen corresponding path program 1 times [2021-11-07 02:20:18,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:18,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129323313] [2021-11-07 02:20:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:18,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:18,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:18,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:20:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:20:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:19,795 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 02:20:19,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:20,081 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 02:20:20,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:20,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129323313] [2021-11-07 02:20:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129323313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:20,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:20,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:20:20,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436835723] [2021-11-07 02:20:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:20,086 INFO L87 Difference]: Start difference. First operand 19723 states and 36637 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:23,389 INFO L93 Difference]: Finished difference Result 56700 states and 105241 transitions. [2021-11-07 02:20:23,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:20:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 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 02:20:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:23,446 INFO L225 Difference]: With dead ends: 56700 [2021-11-07 02:20:23,446 INFO L226 Difference]: Without dead ends: 40608 [2021-11-07 02:20:23,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:20:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40608 states. [2021-11-07 02:20:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40608 to 16351. [2021-11-07 02:20:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16351 states, 16346 states have (on average 1.8496268200171295) internal successors, (30234), 16350 states have internal predecessors, (30234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16351 states to 16351 states and 30234 transitions. [2021-11-07 02:20:24,604 INFO L78 Accepts]: Start accepts. Automaton has 16351 states and 30234 transitions. Word has length 65 [2021-11-07 02:20:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:24,604 INFO L470 AbstractCegarLoop]: Abstraction has 16351 states and 30234 transitions. [2021-11-07 02:20:24,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 16351 states and 30234 transitions. [2021-11-07 02:20:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:20:24,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:24,608 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 02:20:24,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:24,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:24,826 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:24,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1515711788, now seen corresponding path program 1 times [2021-11-07 02:20:24,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:24,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544517546] [2021-11-07 02:20:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:24,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:24,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:24,829 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:24,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:20:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:20:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:25,805 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 02:20:25,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:26,119 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 02:20:26,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:26,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544517546] [2021-11-07 02:20:26,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544517546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:26,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:26,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:20:26,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873437739] [2021-11-07 02:20:26,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:20:26,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:26,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:20:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:20:26,122 INFO L87 Difference]: Start difference. First operand 16351 states and 30234 transitions. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:36,652 INFO L93 Difference]: Finished difference Result 109698 states and 202372 transitions. [2021-11-07 02:20:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:20:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:20:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:36,817 INFO L225 Difference]: With dead ends: 109698 [2021-11-07 02:20:36,817 INFO L226 Difference]: Without dead ends: 94920 [2021-11-07 02:20:36,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:20:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94920 states. [2021-11-07 02:20:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94920 to 39486. [2021-11-07 02:20:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39486 states, 39481 states have (on average 1.854132367467896) internal successors, (73203), 39485 states have internal predecessors, (73203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39486 states to 39486 states and 73203 transitions. [2021-11-07 02:20:39,582 INFO L78 Accepts]: Start accepts. Automaton has 39486 states and 73203 transitions. Word has length 65 [2021-11-07 02:20:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:39,582 INFO L470 AbstractCegarLoop]: Abstraction has 39486 states and 73203 transitions. [2021-11-07 02:20:39,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 39486 states and 73203 transitions. [2021-11-07 02:20:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:20:39,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:39,584 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:39,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:39,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:39,785 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash -122182428, now seen corresponding path program 1 times [2021-11-07 02:20:39,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:39,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506875412] [2021-11-07 02:20:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:39,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:39,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:39,789 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:39,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:20:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:40,752 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 02:20:40,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:40,978 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 02:20:40,978 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:40,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506875412] [2021-11-07 02:20:40,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506875412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:40,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:40,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:40,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493289571] [2021-11-07 02:20:40,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:20:40,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:20:40,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:40,980 INFO L87 Difference]: Start difference. First operand 39486 states and 73203 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:45,030 INFO L93 Difference]: Finished difference Result 116330 states and 215784 transitions. [2021-11-07 02:20:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:45,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:20:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:45,168 INFO L225 Difference]: With dead ends: 116330 [2021-11-07 02:20:45,168 INFO L226 Difference]: Without dead ends: 78473 [2021-11-07 02:20:45,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78473 states. [2021-11-07 02:20:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78473 to 78471. [2021-11-07 02:20:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78471 states, 78466 states have (on average 1.8549945199194555) internal successors, (145554), 78470 states have internal predecessors, (145554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78471 states to 78471 states and 145554 transitions. [2021-11-07 02:20:49,466 INFO L78 Accepts]: Start accepts. Automaton has 78471 states and 145554 transitions. Word has length 66 [2021-11-07 02:20:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:49,466 INFO L470 AbstractCegarLoop]: Abstraction has 78471 states and 145554 transitions. [2021-11-07 02:20:49,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 78471 states and 145554 transitions. [2021-11-07 02:20:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:20:49,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:49,468 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:49,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:49,669 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:20:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash 875749437, now seen corresponding path program 1 times [2021-11-07 02:20:49,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:49,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345931811] [2021-11-07 02:20:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:49,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:49,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:49,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:49,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9af0d01d-b38a-45bd-a674-e93f1a675618/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:20:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:51,053 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 02:20:51,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:51,418 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 02:20:51,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:51,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345931811] [2021-11-07 02:20:51,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345931811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:51,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:51,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:20:51,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387878330] [2021-11-07 02:20:51,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:20:51,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:20:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:20:51,421 INFO L87 Difference]: Start difference. First operand 78471 states and 145554 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:59,020 INFO L93 Difference]: Finished difference Result 111446 states and 206829 transitions. [2021-11-07 02:20:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:20:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:20:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:59,253 INFO L225 Difference]: With dead ends: 111446 [2021-11-07 02:20:59,253 INFO L226 Difference]: Without dead ends: 111429 [2021-11-07 02:20:59,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:20:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111429 states.