./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.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_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/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_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/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_7da8f932-52f8-4680-96c8-83d80bb2bccc/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 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:14,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:14,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:14,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:14,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:14,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:14,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:14,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:14,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:14,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:14,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:14,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:14,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:14,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:14,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:14,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:14,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:14,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:14,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:14,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:14,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:14,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:14,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:14,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:15,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:15,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:15,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:15,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:15,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:15,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:15,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:15,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:15,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:15,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:15,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:15,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:15,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:15,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:15,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:15,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:15,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:15,020 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:18:15,067 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:15,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:15,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:15,070 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:15,070 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:15,071 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:15,071 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:18:15,071 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:15,077 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:15,077 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:18:15,078 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:18:15,079 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:15,079 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:18:15,079 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:18:15,080 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:18:15,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:15,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:18:15,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:18:15,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:18:15,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:15,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:15,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:15,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:15,082 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:15,083 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:18:15,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:15,083 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:15,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:15,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:15,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:15,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:15,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:15,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:15,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:15,085 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:18:15,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:18:15,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:15,086 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:15,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:15,086 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_7da8f932-52f8-4680-96c8-83d80bb2bccc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec [2021-11-07 02:18:15,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:15,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:15,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:15,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:15,392 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:15,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-07 02:18:15,490 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/456980a7c/bb8e21371fcf44c589a5bd6a902fa722/FLAGda6a9f947 [2021-11-07 02:18:16,091 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:16,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-07 02:18:16,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/456980a7c/bb8e21371fcf44c589a5bd6a902fa722/FLAGda6a9f947 [2021-11-07 02:18:16,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/456980a7c/bb8e21371fcf44c589a5bd6a902fa722 [2021-11-07 02:18:16,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:16,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:16,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:16,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:16,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:16,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:16" (1/1) ... [2021-11-07 02:18:16,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d225f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:16, skipping insertion in model container [2021-11-07 02:18:16,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:16" (1/1) ... [2021-11-07 02:18:16,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:16,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:16,913 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_7da8f932-52f8-4680-96c8-83d80bb2bccc/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-07 02:18:16,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:16,965 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 02:18:16,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54271e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:16, skipping insertion in model container [2021-11-07 02:18:16,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:16,966 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:18:16,969 INFO L168 Benchmark]: Toolchain (without parser) took 650.74 ms. Allocated memory is still 117.4 MB. Free memory was 78.6 MB in the beginning and 77.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:16,970 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 90.6 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:18:16,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.07 ms. Allocated memory is still 117.4 MB. Free memory was 78.2 MB in the beginning and 77.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:18:16,974 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 90.6 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 648.07 ms. Allocated memory is still 117.4 MB. Free memory was 78.2 MB in the beginning and 77.1 MB in the end (delta: 1.1 MB). 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: 2667]: 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_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/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_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/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_7da8f932-52f8-4680-96c8-83d80bb2bccc/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 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:18:19,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:18:19,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:18:19,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:18:19,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:18:19,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:18:19,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:18:19,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:18:19,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:18:19,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:18:19,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:18:19,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:18:19,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:18:19,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:18:19,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:18:19,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:18:19,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:18:19,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:18:19,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:18:19,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:18:19,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:18:19,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:18:19,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:18:19,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:18:19,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:18:19,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:18:19,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:18:19,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:18:19,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:18:19,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:18:19,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:18:19,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:18:19,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:18:19,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:18:19,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:18:19,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:18:19,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:18:19,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:18:19,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:18:19,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:18:19,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:18:19,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:18:19,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:18:19,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:18:19,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:18:19,314 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:18:19,314 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:18:19,314 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:18:19,315 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:18:19,315 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:18:19,315 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:18:19,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:18:19,317 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:18:19,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:18:19,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:18:19,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:18:19,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:18:19,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:18:19,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:18:19,319 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:18:19,319 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:18:19,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:18:19,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:18:19,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:18:19,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:18:19,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:18:19,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:18:19,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:18:19,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:19,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:18:19,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:18:19,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:18:19,321 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:18:19,322 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:19,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:18:19,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:18:19,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:18:19,323 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_7da8f932-52f8-4680-96c8-83d80bb2bccc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec [2021-11-07 02:18:19,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:18:19,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:18:19,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:18:19,727 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:18:19,728 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:18:19,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-07 02:18:19,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/1b6b42fee/b7082b07b072486ab1328537c6e948ee/FLAG28e4713c2 [2021-11-07 02:18:20,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:18:20,471 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2021-11-07 02:18:20,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/1b6b42fee/b7082b07b072486ab1328537c6e948ee/FLAG28e4713c2 [2021-11-07 02:18:20,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/data/1b6b42fee/b7082b07b072486ab1328537c6e948ee [2021-11-07 02:18:20,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:18:20,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:18:20,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:20,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:18:20,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:18:20,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:20" (1/1) ... [2021-11-07 02:18:20,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13892df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:20, skipping insertion in model container [2021-11-07 02:18:20,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:18:20" (1/1) ... [2021-11-07 02:18:20,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:18:20,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:21,402 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_7da8f932-52f8-4680-96c8-83d80bb2bccc/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-07 02:18:21,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:21,450 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:18:21,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:21,561 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_7da8f932-52f8-4680-96c8-83d80bb2bccc/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-07 02:18:21,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:21,574 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:18:21,697 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_7da8f932-52f8-4680-96c8-83d80bb2bccc/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2021-11-07 02:18:21,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:21,765 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:18:21,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21 WrapperNode [2021-11-07 02:18:21,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:21,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:21,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:18:21,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:18:21,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:21,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:22,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:18:22,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:18:22,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:18:22,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:18:22,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:18:22,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:18:22,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:18:22,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (1/1) ... [2021-11-07 02:18:22,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:22,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:22,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:18:22,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:18:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:18:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:18:22,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:18:22,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:18:31,069 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:18:31,070 INFO L299 CfgBuilder]: Removed 601 assume(true) statements. [2021-11-07 02:18:31,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:31 BoogieIcfgContainer [2021-11-07 02:18:31,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:18:31,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:18:31,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:18:31,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:18:31,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:18:20" (1/3) ... [2021-11-07 02:18:31,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f12b384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:31, skipping insertion in model container [2021-11-07 02:18:31,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:21" (2/3) ... [2021-11-07 02:18:31,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f12b384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:31, skipping insertion in model container [2021-11-07 02:18:31,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:31" (3/3) ... [2021-11-07 02:18:31,085 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product25.cil.c [2021-11-07 02:18:31,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:18:31,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:18:31,151 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:18:31,158 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 02:18:31,158 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:18:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 2512 states, 2506 states have (on average 1.8902633679169991) internal successors, (4737), 2511 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:18:31,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:31,245 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 02:18:31,246 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 02:18:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:31,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1730714921, now seen corresponding path program 1 times [2021-11-07 02:18:31,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:31,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672547338] [2021-11-07 02:18:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:31,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:31,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:31,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:31,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:18:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:31,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:18:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:31,902 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 02:18:31,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:31,994 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 02:18:31,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:31,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672547338] [2021-11-07 02:18:31,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672547338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:31,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:31,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:18:31,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127304470] [2021-11-07 02:18:32,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:18:32,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:32,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:18:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:18:32,034 INFO L87 Difference]: Start difference. First operand has 2512 states, 2506 states have (on average 1.8902633679169991) internal successors, (4737), 2511 states have internal predecessors, (4737), 0 states have call successors, (0), 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 02:18:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:32,153 INFO L93 Difference]: Finished difference Result 2531 states and 4760 transitions. [2021-11-07 02:18:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:18:32,155 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 02:18:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:32,186 INFO L225 Difference]: With dead ends: 2531 [2021-11-07 02:18:32,186 INFO L226 Difference]: Without dead ends: 2508 [2021-11-07 02:18:32,191 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 02:18:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-11-07 02:18:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2021-11-07 02:18:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2503 states have (on average 1.8877347183379944) internal successors, (4725), 2507 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4725 transitions. [2021-11-07 02:18:32,359 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4725 transitions. Word has length 38 [2021-11-07 02:18:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:32,359 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 4725 transitions. [2021-11-07 02:18:32,360 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 02:18:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4725 transitions. [2021-11-07 02:18:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:18:32,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:32,366 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 02:18:32,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:18:32,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:32,583 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 02:18:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1246197050, now seen corresponding path program 1 times [2021-11-07 02:18:32,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:32,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444473504] [2021-11-07 02:18:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:32,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:32,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:32,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:32,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:18:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:32,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:33,070 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 02:18:33,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:33,188 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 02:18:33,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:33,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444473504] [2021-11-07 02:18:33,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444473504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:33,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:33,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:33,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501531093] [2021-11-07 02:18:33,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:33,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:33,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:33,199 INFO L87 Difference]: Start difference. First operand 2508 states and 4725 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 02:18:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:33,372 INFO L93 Difference]: Finished difference Result 5003 states and 9431 transitions. [2021-11-07 02:18:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:33,373 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 02:18:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:33,391 INFO L225 Difference]: With dead ends: 5003 [2021-11-07 02:18:33,391 INFO L226 Difference]: Without dead ends: 2508 [2021-11-07 02:18:33,400 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 02:18:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-11-07 02:18:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2508. [2021-11-07 02:18:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2503 states have (on average 1.8853375948861366) internal successors, (4719), 2507 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4719 transitions. [2021-11-07 02:18:33,551 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4719 transitions. Word has length 40 [2021-11-07 02:18:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:33,552 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 4719 transitions. [2021-11-07 02:18:33,552 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 02:18:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4719 transitions. [2021-11-07 02:18:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:18:33,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:33,556 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 02:18:33,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:33,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:33,773 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 02:18:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1884272208, now seen corresponding path program 1 times [2021-11-07 02:18:33,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:33,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015792997] [2021-11-07 02:18:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:33,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:33,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:33,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:33,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:18:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:34,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:34,256 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 02:18:34,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:34,383 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 02:18:34,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:34,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015792997] [2021-11-07 02:18:34,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015792997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:34,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:34,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:34,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705582923] [2021-11-07 02:18:34,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:34,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:34,386 INFO L87 Difference]: Start difference. First operand 2508 states and 4719 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 02:18:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:34,644 INFO L93 Difference]: Finished difference Result 4967 states and 9354 transitions. [2021-11-07 02:18:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:34,644 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 02:18:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:34,660 INFO L225 Difference]: With dead ends: 4967 [2021-11-07 02:18:34,661 INFO L226 Difference]: Without dead ends: 2481 [2021-11-07 02:18:34,665 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 02:18:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-07 02:18:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-07 02:18:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2476 states have (on average 1.8832794830371566) internal successors, (4663), 2480 states have internal predecessors, (4663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4663 transitions. [2021-11-07 02:18:34,820 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4663 transitions. Word has length 45 [2021-11-07 02:18:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:34,820 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 4663 transitions. [2021-11-07 02:18:34,821 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 02:18:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4663 transitions. [2021-11-07 02:18:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:18:34,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:34,824 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 02:18:34,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:35,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:35,038 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 02:18:35,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:35,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1368119950, now seen corresponding path program 1 times [2021-11-07 02:18:35,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:35,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369536904] [2021-11-07 02:18:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:35,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:35,042 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:35,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:18:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:35,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:35,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:35,683 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 02:18:35,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:35,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369536904] [2021-11-07 02:18:35,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369536904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:35,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:35,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:18:35,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184010071] [2021-11-07 02:18:35,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:35,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:35,688 INFO L87 Difference]: Start difference. First operand 2481 states and 4663 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 02:18:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:35,861 INFO L93 Difference]: Finished difference Result 4940 states and 9298 transitions. [2021-11-07 02:18:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:35,862 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 02:18:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:35,879 INFO L225 Difference]: With dead ends: 4940 [2021-11-07 02:18:35,879 INFO L226 Difference]: Without dead ends: 2481 [2021-11-07 02:18:35,883 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 02:18:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-07 02:18:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-07 02:18:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2476 states have (on average 1.8808562197092085) internal successors, (4657), 2480 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 4657 transitions. [2021-11-07 02:18:36,011 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 4657 transitions. Word has length 46 [2021-11-07 02:18:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:36,011 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 4657 transitions. [2021-11-07 02:18:36,011 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 02:18:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 4657 transitions. [2021-11-07 02:18:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:18:36,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:36,014 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 02:18:36,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:36,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:36,232 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 02:18:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 427495747, now seen corresponding path program 1 times [2021-11-07 02:18:36,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:36,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796935096] [2021-11-07 02:18:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:36,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:36,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:36,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:18:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:36,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:18:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:36,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:36,872 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 02:18:36,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:36,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796935096] [2021-11-07 02:18:36,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796935096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:36,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:36,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:18:36,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713324454] [2021-11-07 02:18:36,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:36,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:36,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:36,880 INFO L87 Difference]: Start difference. First operand 2481 states and 4657 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 02:18:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:37,109 INFO L93 Difference]: Finished difference Result 4934 states and 9281 transitions. [2021-11-07 02:18:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:37,110 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 02:18:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:37,128 INFO L225 Difference]: With dead ends: 4934 [2021-11-07 02:18:37,128 INFO L226 Difference]: Without dead ends: 2478 [2021-11-07 02:18:37,133 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 02:18:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-11-07 02:18:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2478. [2021-11-07 02:18:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2473 states have (on average 1.8799029518803074) internal successors, (4649), 2477 states have internal predecessors, (4649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 4649 transitions. [2021-11-07 02:18:37,281 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 4649 transitions. Word has length 51 [2021-11-07 02:18:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:37,282 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 4649 transitions. [2021-11-07 02:18:37,282 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 02:18:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 4649 transitions. [2021-11-07 02:18:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:18:37,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:37,286 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:37,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:37,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,500 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 02:18:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash -879979757, now seen corresponding path program 1 times [2021-11-07 02:18:37,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:37,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119736470] [2021-11-07 02:18:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:37,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:37,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:18:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:37,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:38,116 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 02:18:38,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:38,281 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 02:18:38,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:38,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119736470] [2021-11-07 02:18:38,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119736470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:38,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:38,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:38,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899981516] [2021-11-07 02:18:38,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:38,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:38,283 INFO L87 Difference]: Start difference. First operand 2478 states and 4649 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 02:18:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:40,196 INFO L93 Difference]: Finished difference Result 9968 states and 18693 transitions. [2021-11-07 02:18:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:18:40,197 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 02:18:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:40,245 INFO L225 Difference]: With dead ends: 9968 [2021-11-07 02:18:40,246 INFO L226 Difference]: Without dead ends: 7530 [2021-11-07 02:18:40,251 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 02:18:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7530 states. [2021-11-07 02:18:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7530 to 2482. [2021-11-07 02:18:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2477 states have (on average 1.8784820347194187) internal successors, (4653), 2481 states have internal predecessors, (4653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 4653 transitions. [2021-11-07 02:18:40,428 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 4653 transitions. Word has length 52 [2021-11-07 02:18:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:40,428 INFO L470 AbstractCegarLoop]: Abstraction has 2482 states and 4653 transitions. [2021-11-07 02:18:40,428 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 02:18:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 4653 transitions. [2021-11-07 02:18:40,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:18:40,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:40,441 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 02:18:40,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:40,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:40,655 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 02:18:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash -489285685, now seen corresponding path program 1 times [2021-11-07 02:18:40,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:40,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963667208] [2021-11-07 02:18:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:40,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:40,660 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:40,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:18:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:41,273 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 02:18:41,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:41,413 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 02:18:41,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:41,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963667208] [2021-11-07 02:18:41,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963667208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:41,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:41,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:18:41,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459735771] [2021-11-07 02:18:41,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:41,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:41,416 INFO L87 Difference]: Start difference. First operand 2482 states and 4653 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 02:18:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:48,202 INFO L93 Difference]: Finished difference Result 6729 states and 12568 transitions. [2021-11-07 02:18:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:18:48,203 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 02:18:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:48,244 INFO L225 Difference]: With dead ends: 6729 [2021-11-07 02:18:48,244 INFO L226 Difference]: Without dead ends: 5299 [2021-11-07 02:18:48,248 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 02:18:48,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-11-07 02:18:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4608. [2021-11-07 02:18:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4603 states have (on average 1.8807299587225723) internal successors, (8657), 4607 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 8657 transitions. [2021-11-07 02:18:48,504 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 8657 transitions. Word has length 53 [2021-11-07 02:18:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:48,505 INFO L470 AbstractCegarLoop]: Abstraction has 4608 states and 8657 transitions. [2021-11-07 02:18:48,506 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 02:18:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 8657 transitions. [2021-11-07 02:18:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:18:48,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:48,512 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 02:18:48,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:48,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:48,728 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 02:18:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -411242433, now seen corresponding path program 1 times [2021-11-07 02:18:48,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:48,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277723773] [2021-11-07 02:18:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:48,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:48,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:48,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:18:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:49,423 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 02:18:49,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:49,626 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 02:18:49,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:49,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277723773] [2021-11-07 02:18:49,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277723773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:49,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:49,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:49,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764387152] [2021-11-07 02:18:49,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:49,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:49,628 INFO L87 Difference]: Start difference. First operand 4608 states and 8657 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 02:18:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:51,323 INFO L93 Difference]: Finished difference Result 8624 states and 16098 transitions. [2021-11-07 02:18:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:51,324 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 02:18:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:51,339 INFO L225 Difference]: With dead ends: 8624 [2021-11-07 02:18:51,339 INFO L226 Difference]: Without dead ends: 5060 [2021-11-07 02:18:51,346 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 02:18:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-11-07 02:18:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 4511. [2021-11-07 02:18:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 4506 states have (on average 1.8648468708388815) internal successors, (8403), 4510 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 8403 transitions. [2021-11-07 02:18:51,574 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 8403 transitions. Word has length 54 [2021-11-07 02:18:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:51,575 INFO L470 AbstractCegarLoop]: Abstraction has 4511 states and 8403 transitions. [2021-11-07 02:18:51,575 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 02:18:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 8403 transitions. [2021-11-07 02:18:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:18:51,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:51,577 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 02:18:51,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 02:18:51,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:51,791 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 02:18:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash -266811917, now seen corresponding path program 1 times [2021-11-07 02:18:51,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:51,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224614248] [2021-11-07 02:18:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:51,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:51,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:51,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:51,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:18:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:52,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:52,442 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 02:18:52,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:52,624 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 02:18:52,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:52,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224614248] [2021-11-07 02:18:52,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224614248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:52,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:52,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:52,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129508296] [2021-11-07 02:18:52,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:52,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:52,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:52,626 INFO L87 Difference]: Start difference. First operand 4511 states and 8403 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 02:18:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:53,639 INFO L93 Difference]: Finished difference Result 32149 states and 60112 transitions. [2021-11-07 02:18:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:18:53,640 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 02:18:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:53,722 INFO L225 Difference]: With dead ends: 32149 [2021-11-07 02:18:53,723 INFO L226 Difference]: Without dead ends: 27674 [2021-11-07 02:18:53,732 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 02:18:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27674 states. [2021-11-07 02:18:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27674 to 8441. [2021-11-07 02:18:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8436 states have (on average 1.8692508297771455) internal successors, (15769), 8440 states have internal predecessors, (15769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 15769 transitions. [2021-11-07 02:18:54,230 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 15769 transitions. Word has length 55 [2021-11-07 02:18:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:54,230 INFO L470 AbstractCegarLoop]: Abstraction has 8441 states and 15769 transitions. [2021-11-07 02:18:54,231 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 02:18:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 15769 transitions. [2021-11-07 02:18:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:18:54,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:54,233 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 02:18:54,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:54,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,458 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 02:18:54,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash -400825423, now seen corresponding path program 1 times [2021-11-07 02:18:54,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:54,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323174686] [2021-11-07 02:18:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:54,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:54,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:54,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:54,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:18:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:55,122 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 02:18:55,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:55,300 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 02:18:55,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:55,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323174686] [2021-11-07 02:18:55,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323174686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:55,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:55,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:55,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209789166] [2021-11-07 02:18:55,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:55,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:55,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:55,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:55,302 INFO L87 Difference]: Start difference. First operand 8441 states and 15769 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 02:18:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:56,264 INFO L93 Difference]: Finished difference Result 25650 states and 47951 transitions. [2021-11-07 02:18:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:56,264 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 02:18:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:56,314 INFO L225 Difference]: With dead ends: 25650 [2021-11-07 02:18:56,314 INFO L226 Difference]: Without dead ends: 20830 [2021-11-07 02:18:56,321 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 02:18:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20830 states. [2021-11-07 02:18:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20830 to 12992. [2021-11-07 02:18:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12992 states, 12987 states have (on average 1.8696388696388697) internal successors, (24281), 12991 states have internal predecessors, (24281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12992 states to 12992 states and 24281 transitions. [2021-11-07 02:18:56,986 INFO L78 Accepts]: Start accepts. Automaton has 12992 states and 24281 transitions. Word has length 55 [2021-11-07 02:18:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:56,987 INFO L470 AbstractCegarLoop]: Abstraction has 12992 states and 24281 transitions. [2021-11-07 02:18:56,987 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 02:18:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 12992 states and 24281 transitions. [2021-11-07 02:18:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:18:56,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:56,990 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 02:18:57,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:57,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,211 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 02:18:57,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:57,212 INFO L85 PathProgramCache]: Analyzing trace with hash -664558661, now seen corresponding path program 1 times [2021-11-07 02:18:57,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:57,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045881803] [2021-11-07 02:18:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:57,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:57,214 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:57,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:18:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:18:57,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:57,906 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 02:18:57,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:58,126 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 02:18:58,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:58,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045881803] [2021-11-07 02:18:58,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045881803] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:58,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:58,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:18:58,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055057429] [2021-11-07 02:18:58,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:58,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:58,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:58,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:58,129 INFO L87 Difference]: Start difference. First operand 12992 states and 24281 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 02:19:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:01,365 INFO L93 Difference]: Finished difference Result 70612 states and 132251 transitions. [2021-11-07 02:19:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:19:01,366 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 02:19:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:01,486 INFO L225 Difference]: With dead ends: 70612 [2021-11-07 02:19:01,487 INFO L226 Difference]: Without dead ends: 61241 [2021-11-07 02:19:01,510 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:19:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61241 states. [2021-11-07 02:19:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61241 to 20872. [2021-11-07 02:19:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20872 states, 20867 states have (on average 1.8714717017300042) internal successors, (39052), 20871 states have internal predecessors, (39052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20872 states to 20872 states and 39052 transitions. [2021-11-07 02:19:02,727 INFO L78 Accepts]: Start accepts. Automaton has 20872 states and 39052 transitions. Word has length 57 [2021-11-07 02:19:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:02,727 INFO L470 AbstractCegarLoop]: Abstraction has 20872 states and 39052 transitions. [2021-11-07 02:19:02,728 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 02:19:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20872 states and 39052 transitions. [2021-11-07 02:19:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:19:02,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:02,731 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:02,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 02:19:02,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:02,946 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 02:19:02,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:02,947 INFO L85 PathProgramCache]: Analyzing trace with hash -640078504, now seen corresponding path program 1 times [2021-11-07 02:19:02,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:02,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192989924] [2021-11-07 02:19:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:02,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:02,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:02,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:19:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:03,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:19:03,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:03,623 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 02:19:03,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:03,730 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 02:19:03,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:03,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192989924] [2021-11-07 02:19:03,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192989924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:03,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:03,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:03,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710438319] [2021-11-07 02:19:03,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:03,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:03,732 INFO L87 Difference]: Start difference. First operand 20872 states and 39052 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 02:19:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:05,461 INFO L93 Difference]: Finished difference Result 50354 states and 93847 transitions. [2021-11-07 02:19:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:19:05,461 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 02:19:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:05,508 INFO L225 Difference]: With dead ends: 50354 [2021-11-07 02:19:05,508 INFO L226 Difference]: Without dead ends: 31053 [2021-11-07 02:19:05,531 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 02:19:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31053 states. [2021-11-07 02:19:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31053 to 20749. [2021-11-07 02:19:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20749 states, 20744 states have (on average 1.8609236405707674) internal successors, (38603), 20748 states have internal predecessors, (38603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20749 states to 20749 states and 38603 transitions. [2021-11-07 02:19:06,572 INFO L78 Accepts]: Start accepts. Automaton has 20749 states and 38603 transitions. Word has length 64 [2021-11-07 02:19:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:06,572 INFO L470 AbstractCegarLoop]: Abstraction has 20749 states and 38603 transitions. [2021-11-07 02:19:06,572 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 02:19:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20749 states and 38603 transitions. [2021-11-07 02:19:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:19:06,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:06,575 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 02:19:06,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:06,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:06,790 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 02:19:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -562367461, now seen corresponding path program 1 times [2021-11-07 02:19:06,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:06,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946751351] [2021-11-07 02:19:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:06,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:06,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:06,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:19:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:19:07,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:07,478 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 02:19:07,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:07,628 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 02:19:07,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:07,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946751351] [2021-11-07 02:19:07,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946751351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:07,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:07,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:19:07,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333498512] [2021-11-07 02:19:07,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:19:07,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:07,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:19:07,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:19:07,631 INFO L87 Difference]: Start difference. First operand 20749 states and 38603 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 02:19:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:08,607 INFO L93 Difference]: Finished difference Result 38021 states and 70679 transitions. [2021-11-07 02:19:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:08,608 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 02:19:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:08,633 INFO L225 Difference]: With dead ends: 38021 [2021-11-07 02:19:08,633 INFO L226 Difference]: Without dead ends: 20764 [2021-11-07 02:19:08,644 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 02:19:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20764 states. [2021-11-07 02:19:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20764 to 20749. [2021-11-07 02:19:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20749 states, 20744 states have (on average 1.8540782876976476) internal successors, (38461), 20748 states have internal predecessors, (38461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20749 states to 20749 states and 38461 transitions. [2021-11-07 02:19:09,632 INFO L78 Accepts]: Start accepts. Automaton has 20749 states and 38461 transitions. Word has length 64 [2021-11-07 02:19:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:09,632 INFO L470 AbstractCegarLoop]: Abstraction has 20749 states and 38461 transitions. [2021-11-07 02:19:09,633 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 02:19:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 20749 states and 38461 transitions. [2021-11-07 02:19:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:19:09,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:09,635 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 02:19:09,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:09,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:09,849 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 02:19:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash -794133098, now seen corresponding path program 1 times [2021-11-07 02:19:09,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:09,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563059294] [2021-11-07 02:19:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:09,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:09,851 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:09,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:19:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:10,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:10,605 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 02:19:10,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:10,843 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 02:19:10,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:10,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563059294] [2021-11-07 02:19:10,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563059294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:10,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:10,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:19:10,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675836029] [2021-11-07 02:19:10,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:19:10,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:19:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:19:10,846 INFO L87 Difference]: Start difference. First operand 20749 states and 38461 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 02:19:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:13,618 INFO L93 Difference]: Finished difference Result 59670 states and 110521 transitions. [2021-11-07 02:19:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:19:13,619 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 02:19:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:13,684 INFO L225 Difference]: With dead ends: 59670 [2021-11-07 02:19:13,684 INFO L226 Difference]: Without dead ends: 42714 [2021-11-07 02:19:13,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:19:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42714 states. [2021-11-07 02:19:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42714 to 17161. [2021-11-07 02:19:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17161 states, 17156 states have (on average 1.8462345535089764) internal successors, (31674), 17160 states have internal predecessors, (31674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17161 states to 17161 states and 31674 transitions. [2021-11-07 02:19:14,806 INFO L78 Accepts]: Start accepts. Automaton has 17161 states and 31674 transitions. Word has length 65 [2021-11-07 02:19:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:14,806 INFO L470 AbstractCegarLoop]: Abstraction has 17161 states and 31674 transitions. [2021-11-07 02:19:14,807 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 02:19:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 17161 states and 31674 transitions. [2021-11-07 02:19:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:19:14,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:14,809 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 02:19:14,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:19:15,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:15,031 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 02:19:15,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:15,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1805250348, now seen corresponding path program 1 times [2021-11-07 02:19:15,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:15,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353798167] [2021-11-07 02:19:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:15,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:15,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:15,034 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:15,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:19:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:19:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:15,877 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 02:19:15,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:16,126 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 02:19:16,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:16,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353798167] [2021-11-07 02:19:16,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353798167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:16,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:16,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:19:16,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462595359] [2021-11-07 02:19:16,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:19:16,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:19:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:19:16,129 INFO L87 Difference]: Start difference. First operand 17161 states and 31674 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 02:19:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:25,948 INFO L93 Difference]: Finished difference Result 115152 states and 212068 transitions. [2021-11-07 02:19:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:19:25,948 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 02:19:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:26,107 INFO L225 Difference]: With dead ends: 115152 [2021-11-07 02:19:26,107 INFO L226 Difference]: Without dead ends: 99618 [2021-11-07 02:19:26,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:19:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99618 states. [2021-11-07 02:19:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99618 to 41592. [2021-11-07 02:19:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41592 states, 41587 states have (on average 1.8502657080337606) internal successors, (76947), 41591 states have internal predecessors, (76947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41592 states to 41592 states and 76947 transitions. [2021-11-07 02:19:28,744 INFO L78 Accepts]: Start accepts. Automaton has 41592 states and 76947 transitions. Word has length 65 [2021-11-07 02:19:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:28,744 INFO L470 AbstractCegarLoop]: Abstraction has 41592 states and 76947 transitions. [2021-11-07 02:19:28,744 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 02:19:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 41592 states and 76947 transitions. [2021-11-07 02:19:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:19:28,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:28,746 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 02:19:28,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:28,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:28,947 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 02:19:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash -508173356, now seen corresponding path program 1 times [2021-11-07 02:19:28,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:28,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050047088] [2021-11-07 02:19:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:28,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:28,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:28,949 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:28,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:19:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:19:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:29,763 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 02:19:29,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:29,940 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 02:19:29,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:29,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050047088] [2021-11-07 02:19:29,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050047088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:29,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:29,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:19:29,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591194125] [2021-11-07 02:19:29,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:19:29,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:19:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:19:29,942 INFO L87 Difference]: Start difference. First operand 41592 states and 76947 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 02:19:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:33,290 INFO L93 Difference]: Finished difference Result 122540 states and 226824 transitions. [2021-11-07 02:19:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:19:33,292 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 02:19:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:33,414 INFO L225 Difference]: With dead ends: 122540 [2021-11-07 02:19:33,414 INFO L226 Difference]: Without dead ends: 82631 [2021-11-07 02:19:33,442 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 02:19:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82631 states. [2021-11-07 02:19:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82631 to 82629. [2021-11-07 02:19:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82629 states, 82624 states have (on average 1.8511086367157243) internal successors, (152946), 82628 states have internal predecessors, (152946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82629 states to 82629 states and 152946 transitions. [2021-11-07 02:19:37,372 INFO L78 Accepts]: Start accepts. Automaton has 82629 states and 152946 transitions. Word has length 66 [2021-11-07 02:19:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:37,372 INFO L470 AbstractCegarLoop]: Abstraction has 82629 states and 152946 transitions. [2021-11-07 02:19:37,373 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 02:19:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 82629 states and 152946 transitions. [2021-11-07 02:19:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:19:37,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:37,374 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 02:19:37,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:37,575 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 02:19:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1794702397, now seen corresponding path program 1 times [2021-11-07 02:19:37,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:37,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395958040] [2021-11-07 02:19:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:37,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:37,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:37,815 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:37,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7da8f932-52f8-4680-96c8-83d80bb2bccc/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:19:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:38,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:39,085 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 02:19:39,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:39,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395958040] [2021-11-07 02:19:39,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395958040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:39,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:19:39,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:19:39,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867828458] [2021-11-07 02:19:39,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:39,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:39,088 INFO L87 Difference]: Start difference. First operand 82629 states and 152946 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 02:19:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:46,063 INFO L93 Difference]: Finished difference Result 116792 states and 216333 transitions. [2021-11-07 02:19:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:19:46,063 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 02:19:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:46,368 INFO L225 Difference]: With dead ends: 116792 [2021-11-07 02:19:46,369 INFO L226 Difference]: Without dead ends: 116775 [2021-11-07 02:19:46,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:19:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116775 states.