./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:58:01,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:58:01,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:58:01,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:58:01,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:58:01,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:58:01,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:58:01,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:58:01,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:58:01,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:58:01,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:58:01,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:58:01,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:58:01,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:58:01,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:58:01,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:58:01,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:58:01,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:58:01,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:58:01,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:58:01,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:58:01,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:58:01,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:58:01,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:58:01,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:58:01,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:58:01,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:58:01,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:58:01,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:58:01,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:58:01,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:58:01,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:58:01,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:58:01,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:58:01,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:58:01,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:58:01,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:58:01,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:58:01,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:58:01,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:58:01,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:58:01,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:58:01,746 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:58:01,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:58:01,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:58:01,747 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:58:01,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:58:01,748 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:58:01,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:58:01,748 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:58:01,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:58:01,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:58:01,749 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:58:01,749 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:58:01,749 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:58:01,749 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:58:01,750 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:58:01,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:58:01,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:58:01,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:58:01,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:58:01,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:58:01,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:58:01,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:58:01,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:58:01,752 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:58:01,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:58:01,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:58:01,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:58:01,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:58:01,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:58:01,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:58:01,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:01,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:58:01,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:58:01,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:58:01,754 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:58:01,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:58:01,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:58:01,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:58:01,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:58:01,755 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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2021-11-07 00:58:02,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:58:02,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:58:02,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:58:02,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:58:02,067 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:58:02,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-07 00:58:02,139 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/8ffe59586/36f2fc58032e4ab185e1d6a4d2f8edf3/FLAGe87dde2d5 [2021-11-07 00:58:02,849 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:58:02,849 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-07 00:58:02,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/8ffe59586/36f2fc58032e4ab185e1d6a4d2f8edf3/FLAGe87dde2d5 [2021-11-07 00:58:03,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/8ffe59586/36f2fc58032e4ab185e1d6a4d2f8edf3 [2021-11-07 00:58:03,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:58:03,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:58:03,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:03,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:58:03,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:58:03,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:03" (1/1) ... [2021-11-07 00:58:03,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b082dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:03, skipping insertion in model container [2021-11-07 00:58:03,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:03" (1/1) ... [2021-11-07 00:58:03,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:58:03,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:03,828 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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-07 00:58:03,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:03,855 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 00:58:03,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34974905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:03, skipping insertion in model container [2021-11-07 00:58:03,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:03,856 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:58:03,858 INFO L168 Benchmark]: Toolchain (without parser) took 820.19 ms. Allocated memory is still 100.7 MB. Free memory was 60.0 MB in the beginning and 62.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:58:03,859 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 100.7 MB. Free memory was 79.8 MB in the beginning and 79.6 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:58:03,860 INFO L168 Benchmark]: CACSL2BoogieTranslator took 808.78 ms. Allocated memory is still 100.7 MB. Free memory was 59.9 MB in the beginning and 62.7 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:58:03,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 100.7 MB. Free memory was 79.8 MB in the beginning and 79.6 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 808.78 ms. Allocated memory is still 100.7 MB. Free memory was 59.9 MB in the beginning and 62.7 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2070]: 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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:58:06,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:58:06,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:58:06,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:58:06,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:58:06,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:58:06,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:58:06,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:58:06,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:58:06,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:58:06,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:58:06,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:58:06,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:58:06,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:58:06,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:58:06,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:58:06,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:58:06,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:58:06,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:58:06,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:58:06,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:58:06,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:58:06,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:58:06,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:58:06,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:58:06,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:58:06,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:58:06,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:58:06,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:58:06,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:58:06,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:58:06,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:58:06,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:58:06,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:58:06,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:58:06,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:58:06,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:58:06,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:58:06,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:58:06,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:58:06,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:58:06,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 00:58:06,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:58:06,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:58:06,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:58:06,254 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:58:06,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:58:06,254 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:58:06,254 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:58:06,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:58:06,255 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:58:06,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:58:06,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:58:06,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:58:06,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:58:06,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:58:06,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:58:06,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:58:06,258 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:58:06,258 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:58:06,259 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:58:06,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:58:06,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:58:06,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:58:06,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:58:06,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:58:06,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:58:06,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:58:06,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:06,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:58:06,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:58:06,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:58:06,261 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:58:06,261 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:58:06,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:58:06,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:58:06,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:58:06,262 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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2021-11-07 00:58:06,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:58:06,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:58:06,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:58:06,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:58:06,709 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:58:06,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-07 00:58:06,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/5c44b4b82/a82ed6724aee4309a063910450498e3f/FLAG2d596ea59 [2021-11-07 00:58:07,578 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:58:07,579 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-07 00:58:07,605 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/5c44b4b82/a82ed6724aee4309a063910450498e3f/FLAG2d596ea59 [2021-11-07 00:58:07,718 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/data/5c44b4b82/a82ed6724aee4309a063910450498e3f [2021-11-07 00:58:07,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:58:07,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:58:07,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:07,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:58:07,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:58:07,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:07" (1/1) ... [2021-11-07 00:58:07,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e9e31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:07, skipping insertion in model container [2021-11-07 00:58:07,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:58:07" (1/1) ... [2021-11-07 00:58:07,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:58:07,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:08,444 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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-07 00:58:08,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:08,477 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:58:08,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:58:08,631 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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-07 00:58:08,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:08,651 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:58:08,787 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_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-07 00:58:08,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:58:08,821 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:58:08,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08 WrapperNode [2021-11-07 00:58:08,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:58:08,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:08,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:58:08,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:58:08,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:08,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:09,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:58:09,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:58:09,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:58:09,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:58:09,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:09,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:09,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:09,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:10,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:10,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:10,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:11,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:58:11,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:58:11,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:58:11,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:58:11,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (1/1) ... [2021-11-07 00:58:11,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:58:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:58:11,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:58:11,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:58:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:58:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:58:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:58:11,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:58:34,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:58:34,352 INFO L299 CfgBuilder]: Removed 2717 assume(true) statements. [2021-11-07 00:58:34,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:34 BoogieIcfgContainer [2021-11-07 00:58:34,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:58:34,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:58:34,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:58:34,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:58:34,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:58:07" (1/3) ... [2021-11-07 00:58:34,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6b6218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:34, skipping insertion in model container [2021-11-07 00:58:34,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:58:08" (2/3) ... [2021-11-07 00:58:34,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6b6218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:58:34, skipping insertion in model container [2021-11-07 00:58:34,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:58:34" (3/3) ... [2021-11-07 00:58:34,380 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2021-11-07 00:58:34,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:58:34,387 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 00:58:34,627 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:58:34,637 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 00:58:34,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 00:58:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 12063 states, 12052 states have (on average 1.8918021905077995) internal successors, (22800), 12062 states have internal predecessors, (22800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 00:58:34,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:34,933 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] [2021-11-07 00:58:34,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:58:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1518968946, now seen corresponding path program 1 times [2021-11-07 00:58:34,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:34,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002547519] [2021-11-07 00:58:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:34,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:34,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:34,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:34,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:58:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:35,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:58:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:35,593 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 00:58:35,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:35,720 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 00:58:35,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:35,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002547519] [2021-11-07 00:58:35,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002547519] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:35,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:35,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:58:35,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259346236] [2021-11-07 00:58:35,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:58:35,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:58:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:58:35,799 INFO L87 Difference]: Start difference. First operand has 12063 states, 12052 states have (on average 1.8918021905077995) internal successors, (22800), 12062 states have internal predecessors, (22800), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:40,992 INFO L93 Difference]: Finished difference Result 84063 states and 158881 transitions. [2021-11-07 00:58:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 00:58:40,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 30 [2021-11-07 00:58:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:41,416 INFO L225 Difference]: With dead ends: 84063 [2021-11-07 00:58:41,417 INFO L226 Difference]: Without dead ends: 72001 [2021-11-07 00:58:41,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 00:58:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72001 states. [2021-11-07 00:58:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72001 to 12075. [2021-11-07 00:58:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12075 states, 12065 states have (on average 1.8895151263986738) internal successors, (22797), 12074 states have internal predecessors, (22797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12075 states to 12075 states and 22797 transitions. [2021-11-07 00:58:42,770 INFO L78 Accepts]: Start accepts. Automaton has 12075 states and 22797 transitions. Word has length 30 [2021-11-07 00:58:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:42,771 INFO L470 AbstractCegarLoop]: Abstraction has 12075 states and 22797 transitions. [2021-11-07 00:58:42,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 12075 states and 22797 transitions. [2021-11-07 00:58:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 00:58:42,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:42,783 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] [2021-11-07 00:58:42,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:42,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:43,000 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:58:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1197617864, now seen corresponding path program 1 times [2021-11-07 00:58:43,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:43,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436328597] [2021-11-07 00:58:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:43,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:43,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:43,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:58:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:58:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:43,493 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 00:58:43,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:43,606 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 00:58:43,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:43,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436328597] [2021-11-07 00:58:43,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436328597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:43,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:43,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:58:43,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006222270] [2021-11-07 00:58:43,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:58:43,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:58:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:58:43,611 INFO L87 Difference]: Start difference. First operand 12075 states and 22797 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:44,229 INFO L93 Difference]: Finished difference Result 24062 states and 45437 transitions. [2021-11-07 00:58:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:58:44,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-11-07 00:58:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:44,260 INFO L225 Difference]: With dead ends: 24062 [2021-11-07 00:58:44,261 INFO L226 Difference]: Without dead ends: 12001 [2021-11-07 00:58:44,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 00:58:44,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12001 states. [2021-11-07 00:58:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12001 to 12001. [2021-11-07 00:58:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12001 states, 11991 states have (on average 1.8891668751563673) internal successors, (22653), 12000 states have internal predecessors, (22653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 22653 transitions. [2021-11-07 00:58:44,887 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 22653 transitions. Word has length 32 [2021-11-07 00:58:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 12001 states and 22653 transitions. [2021-11-07 00:58:44,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 22653 transitions. [2021-11-07 00:58:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 00:58:44,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:44,901 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] [2021-11-07 00:58:44,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:45,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:45,129 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:58:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:45,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1967292650, now seen corresponding path program 1 times [2021-11-07 00:58:45,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:45,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629384886] [2021-11-07 00:58:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:45,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:45,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:45,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:45,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:58:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 00:58:45,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:45,723 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 00:58:45,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:58:45,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:45,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629384886] [2021-11-07 00:58:45,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629384886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:45,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:45,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:58:45,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786727385] [2021-11-07 00:58:45,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:45,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:45,868 INFO L87 Difference]: Start difference. First operand 12001 states and 22653 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:46,896 INFO L93 Difference]: Finished difference Result 23976 states and 45269 transitions. [2021-11-07 00:58:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:58:46,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 34 [2021-11-07 00:58:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:46,924 INFO L225 Difference]: With dead ends: 23976 [2021-11-07 00:58:46,925 INFO L226 Difference]: Without dead ends: 12001 [2021-11-07 00:58:46,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:58:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12001 states. [2021-11-07 00:58:47,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12001 to 12001. [2021-11-07 00:58:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12001 states, 11991 states have (on average 1.8883329163539322) internal successors, (22643), 12000 states have internal predecessors, (22643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 22643 transitions. [2021-11-07 00:58:47,489 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 22643 transitions. Word has length 34 [2021-11-07 00:58:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:47,490 INFO L470 AbstractCegarLoop]: Abstraction has 12001 states and 22643 transitions. [2021-11-07 00:58:47,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 22643 transitions. [2021-11-07 00:58:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 00:58:47,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:47,496 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 00:58:47,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:47,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:47,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:58:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:47,712 INFO L85 PathProgramCache]: Analyzing trace with hash 27334880, now seen corresponding path program 1 times [2021-11-07 00:58:47,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:47,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38139037] [2021-11-07 00:58:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:47,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:47,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:47,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:47,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:58:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:48,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:48,355 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 00:58:48,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:48,561 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 00:58:48,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:48,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38139037] [2021-11-07 00:58:48,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38139037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:48,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:48,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:58:48,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776468197] [2021-11-07 00:58:48,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:58:48,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:58:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:58:48,564 INFO L87 Difference]: Start difference. First operand 12001 states and 22643 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:58:55,425 INFO L93 Difference]: Finished difference Result 53388 states and 100337 transitions. [2021-11-07 00:58:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 00:58:55,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 00:58:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:58:55,511 INFO L225 Difference]: With dead ends: 53388 [2021-11-07 00:58:55,512 INFO L226 Difference]: Without dead ends: 41457 [2021-11-07 00:58:55,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-11-07 00:58:55,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41457 states. [2021-11-07 00:58:56,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41457 to 21288. [2021-11-07 00:58:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21288 states, 21278 states have (on average 1.8877244101889274) internal successors, (40167), 21287 states have internal predecessors, (40167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21288 states to 21288 states and 40167 transitions. [2021-11-07 00:58:56,608 INFO L78 Accepts]: Start accepts. Automaton has 21288 states and 40167 transitions. Word has length 38 [2021-11-07 00:58:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:58:56,608 INFO L470 AbstractCegarLoop]: Abstraction has 21288 states and 40167 transitions. [2021-11-07 00:58:56,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:58:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21288 states and 40167 transitions. [2021-11-07 00:58:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 00:58:56,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:58:56,610 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 00:58:56,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:58:56,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:58:56,824 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:58:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:58:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash -665379077, now seen corresponding path program 1 times [2021-11-07 00:58:56,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:58:56,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629178029] [2021-11-07 00:58:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:58:56,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:58:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:58:56,827 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:58:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:58:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:58:57,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 00:58:57,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:58:57,321 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 00:58:57,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:58:57,444 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 00:58:57,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:58:57,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629178029] [2021-11-07 00:58:57,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629178029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:58:57,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:58:57,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 00:58:57,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212422180] [2021-11-07 00:58:57,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:58:57,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:58:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:58:57,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:58:57,447 INFO L87 Difference]: Start difference. First operand 21288 states and 40167 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 00:59:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:04,350 INFO L93 Difference]: Finished difference Result 179289 states and 338516 transitions. [2021-11-07 00:59:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:59:04,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 00:59:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:04,887 INFO L225 Difference]: With dead ends: 179289 [2021-11-07 00:59:04,888 INFO L226 Difference]: Without dead ends: 158071 [2021-11-07 00:59:04,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 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 00:59:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158071 states. [2021-11-07 00:59:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158071 to 40083. [2021-11-07 00:59:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40083 states, 40073 states have (on average 1.886731714620817) internal successors, (75607), 40082 states have internal predecessors, (75607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40083 states to 40083 states and 75607 transitions. [2021-11-07 00:59:07,691 INFO L78 Accepts]: Start accepts. Automaton has 40083 states and 75607 transitions. Word has length 38 [2021-11-07 00:59:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:07,691 INFO L470 AbstractCegarLoop]: Abstraction has 40083 states and 75607 transitions. [2021-11-07 00:59:07,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 00:59:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 40083 states and 75607 transitions. [2021-11-07 00:59:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 00:59:07,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:07,693 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:07,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:07,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:07,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:59:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash 11022967, now seen corresponding path program 1 times [2021-11-07 00:59:07,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:07,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128239939] [2021-11-07 00:59:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:07,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:07,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:07,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:59:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:08,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:08,349 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 00:59:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:08,444 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 00:59:08,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:08,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128239939] [2021-11-07 00:59:08,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128239939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:08,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:08,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:59:08,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807180114] [2021-11-07 00:59:08,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:59:08,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:08,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:59:08,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:59:08,446 INFO L87 Difference]: Start difference. First operand 40083 states and 75607 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:11,332 INFO L93 Difference]: Finished difference Result 119249 states and 224947 transitions. [2021-11-07 00:59:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:59:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 00:59:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:11,510 INFO L225 Difference]: With dead ends: 119249 [2021-11-07 00:59:11,510 INFO L226 Difference]: Without dead ends: 79198 [2021-11-07 00:59:11,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 00:59:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79198 states. [2021-11-07 00:59:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79198 to 39959. [2021-11-07 00:59:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39959 states, 39949 states have (on average 1.8863801346717064) internal successors, (75359), 39958 states have internal predecessors, (75359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39959 states to 39959 states and 75359 transitions. [2021-11-07 00:59:13,323 INFO L78 Accepts]: Start accepts. Automaton has 39959 states and 75359 transitions. Word has length 39 [2021-11-07 00:59:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:13,323 INFO L470 AbstractCegarLoop]: Abstraction has 39959 states and 75359 transitions. [2021-11-07 00:59:13,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 39959 states and 75359 transitions. [2021-11-07 00:59:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 00:59:13,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:13,324 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:13,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:13,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:13,525 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:59:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2063666708, now seen corresponding path program 1 times [2021-11-07 00:59:13,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:13,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079107508] [2021-11-07 00:59:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:13,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:13,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:13,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:13,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:59:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 00:59:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:14,019 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 00:59:14,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:14,181 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 00:59:14,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:14,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079107508] [2021-11-07 00:59:14,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079107508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:14,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:14,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:59:14,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783381169] [2021-11-07 00:59:14,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:59:14,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:14,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:59:14,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:59:14,184 INFO L87 Difference]: Start difference. First operand 39959 states and 75359 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:59:28,646 INFO L93 Difference]: Finished difference Result 150790 states and 284103 transitions. [2021-11-07 00:59:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 00:59:28,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-07 00:59:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:59:28,842 INFO L225 Difference]: With dead ends: 150790 [2021-11-07 00:59:28,842 INFO L226 Difference]: Without dead ends: 110865 [2021-11-07 00:59:28,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:59:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110865 states. [2021-11-07 00:59:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110865 to 77865. [2021-11-07 00:59:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77865 states, 77855 states have (on average 1.8701046817802325) internal successors, (145597), 77864 states have internal predecessors, (145597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77865 states to 77865 states and 145597 transitions. [2021-11-07 00:59:31,897 INFO L78 Accepts]: Start accepts. Automaton has 77865 states and 145597 transitions. Word has length 39 [2021-11-07 00:59:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:59:31,898 INFO L470 AbstractCegarLoop]: Abstraction has 77865 states and 145597 transitions. [2021-11-07 00:59:31,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:59:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 77865 states and 145597 transitions. [2021-11-07 00:59:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 00:59:31,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:59:31,899 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:59:31,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:59:32,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:59:32,115 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 00:59:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:59:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2075324051, now seen corresponding path program 1 times [2021-11-07 00:59:32,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:59:32,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591525521] [2021-11-07 00:59:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:59:32,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:59:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:59:32,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:59:32,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17cbdf5a-6b41-4fe9-98d3-d32670587ae3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:59:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:59:32,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:59:32,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:59:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:59:32,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:59:32,679 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 00:59:32,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:59:32,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591525521] [2021-11-07 00:59:32,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591525521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:59:32,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:59:32,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:59:32,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306945440] [2021-11-07 00:59:32,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:59:32,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:59:32,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:59:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:59:32,685 INFO L87 Difference]: Start difference. First operand 77865 states and 145597 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)