./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.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_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/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_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/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_74af37e3-7ae7-4a43-b537-736cefe06ae2/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 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:40,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:40,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:40,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:40,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:40,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:40,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:40,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:40,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:40,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:40,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:40,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:40,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:40,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:40,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:40,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:40,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:40,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:40,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:40,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:40,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:40,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:40,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:40,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:40,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:40,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:40,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:40,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:40,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:40,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:40,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:40,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:40,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:40,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:40,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:40,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:40,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:40,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:40,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:40,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:40,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:40,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:48:40,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:40,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:40,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:40,837 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:40,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:40,838 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:40,838 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:48:40,838 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:40,838 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:40,838 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:48:40,839 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:48:40,839 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:40,839 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:48:40,839 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:48:40,840 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:48:40,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:40,841 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:40,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:48:40,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:40,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:40,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:40,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:40,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:40,846 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:40,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:40,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:40,847 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:40,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:40,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:40,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:40,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:40,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:40,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:40,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:40,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:48:40,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:48:40,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:40,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:40,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:40,853 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_74af37e3-7ae7-4a43-b537-736cefe06ae2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 [2021-11-07 01:48:41,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:41,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:41,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:41,159 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:41,159 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:41,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2021-11-07 01:48:41,217 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/f26ab7761/506af5e7f1d3419da09e935de120fb67/FLAG293497e1d [2021-11-07 01:48:41,913 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:41,914 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2021-11-07 01:48:41,950 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/f26ab7761/506af5e7f1d3419da09e935de120fb67/FLAG293497e1d [2021-11-07 01:48:42,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/f26ab7761/506af5e7f1d3419da09e935de120fb67 [2021-11-07 01:48:42,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:42,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:42,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:42,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:42,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:42,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:42" (1/1) ... [2021-11-07 01:48:42,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6249382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:42, skipping insertion in model container [2021-11-07 01:48:42,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:42" (1/1) ... [2021-11-07 01:48:42,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:42,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:42,780 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_74af37e3-7ae7-4a43-b537-736cefe06ae2/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2021-11-07 01:48:42,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:42,799 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:48:42,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@69b5391f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:42, skipping insertion in model container [2021-11-07 01:48:42,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:42,802 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:48:42,805 INFO L168 Benchmark]: Toolchain (without parser) took 711.89 ms. Allocated memory is still 96.5 MB. Free memory was 62.9 MB in the beginning and 58.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:42,806 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 96.5 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:42,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 705.68 ms. Allocated memory is still 96.5 MB. Free memory was 62.6 MB in the beginning and 58.1 MB in the end (delta: 4.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:42,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 96.5 MB. Free memory is still 51.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 705.68 ms. Allocated memory is still 96.5 MB. Free memory was 62.6 MB in the beginning and 58.1 MB in the end (delta: 4.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2512]: 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_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/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_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/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_74af37e3-7ae7-4a43-b537-736cefe06ae2/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 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:45,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:45,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:45,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:45,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:45,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:45,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:45,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:45,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:45,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:45,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:45,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:45,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:45,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:45,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:45,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:45,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:45,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:45,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:45,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:45,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:45,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:45,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:45,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:45,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:45,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:45,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:45,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:45,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:45,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:45,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:45,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:45,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:45,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:45,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:45,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:45,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:45,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:45,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:45,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:45,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:45,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:48:45,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:45,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:45,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:45,157 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:45,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:45,157 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:45,157 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:45,157 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:45,157 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:45,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:45,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:48:45,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:48:45,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:45,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:45,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:45,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:45,160 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:45,160 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:48:45,160 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:48:45,160 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:48:45,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:45,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:45,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:45,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:45,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:48:45,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:45,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:45,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:45,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:45,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:45,162 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:48:45,162 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:45,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:45,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:45,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:45,163 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_74af37e3-7ae7-4a43-b537-736cefe06ae2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 [2021-11-07 01:48:45,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:45,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:45,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:45,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:45,569 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:45,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2021-11-07 01:48:45,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/633f0ca2a/b90b0421ca7d407ba1649c6fbe89dafb/FLAG7636f3e64 [2021-11-07 01:48:46,342 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:46,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2021-11-07 01:48:46,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/633f0ca2a/b90b0421ca7d407ba1649c6fbe89dafb/FLAG7636f3e64 [2021-11-07 01:48:46,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/data/633f0ca2a/b90b0421ca7d407ba1649c6fbe89dafb [2021-11-07 01:48:46,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:46,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:46,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:46,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:46,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:46,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:46" (1/1) ... [2021-11-07 01:48:46,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32672e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:46, skipping insertion in model container [2021-11-07 01:48:46,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:46" (1/1) ... [2021-11-07 01:48:46,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:46,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:47,370 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_74af37e3-7ae7-4a43-b537-736cefe06ae2/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2021-11-07 01:48:47,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:47,385 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:48:47,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:47,575 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_74af37e3-7ae7-4a43-b537-736cefe06ae2/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2021-11-07 01:48:47,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:47,589 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:48:47,681 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_74af37e3-7ae7-4a43-b537-736cefe06ae2/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2021-11-07 01:48:47,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:47,734 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:48:47,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47 WrapperNode [2021-11-07 01:48:47,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:47,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:47,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:48:47,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:48:47,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:47,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:48,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:48:48,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:48:48,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:48:48,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:48:48,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:48:48,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:48:48,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:48:48,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (1/1) ... [2021-11-07 01:48:48,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:48,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:48:48,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:48:48,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:48:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:48:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:48:48,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:48:48,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:49:01,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:49:01,707 INFO L299 CfgBuilder]: Removed 1233 assume(true) statements. [2021-11-07 01:49:01,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:01 BoogieIcfgContainer [2021-11-07 01:49:01,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:49:01,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:49:01,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:49:01,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:49:01,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:48:46" (1/3) ... [2021-11-07 01:49:01,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7c764c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:01, skipping insertion in model container [2021-11-07 01:49:01,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:47" (2/3) ... [2021-11-07 01:49:01,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7c764c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:01, skipping insertion in model container [2021-11-07 01:49:01,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:01" (3/3) ... [2021-11-07 01:49:01,723 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product28.cil.c [2021-11-07 01:49:01,728 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:49:01,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:49:01,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:49:01,809 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:49:01,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:49:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 5044 states, 5038 states have (on average 1.8870583564906709) internal successors, (9507), 5043 states have internal predecessors, (9507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:01,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:49:01,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:01,923 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] [2021-11-07 01:49:01,924 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:01,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1878440157, now seen corresponding path program 1 times [2021-11-07 01:49:01,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:01,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641678734] [2021-11-07 01:49:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:01,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:01,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:01,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:01,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:49:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:49:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:02,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:02,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:02,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641678734] [2021-11-07 01:49:02,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641678734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:02,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:02,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:49:02,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265862567] [2021-11-07 01:49:02,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:49:02,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:49:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:02,523 INFO L87 Difference]: Start difference. First operand has 5044 states, 5038 states have (on average 1.8870583564906709) internal successors, (9507), 5043 states have internal predecessors, (9507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:02,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:02,697 INFO L93 Difference]: Finished difference Result 5063 states and 9530 transitions. [2021-11-07 01:49:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:49:02,698 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-07 01:49:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:02,749 INFO L225 Difference]: With dead ends: 5063 [2021-11-07 01:49:02,750 INFO L226 Difference]: Without dead ends: 5040 [2021-11-07 01:49:02,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-11-07 01:49:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5040. [2021-11-07 01:49:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5035 states have (on average 1.8857994041708044) internal successors, (9495), 5039 states have internal predecessors, (9495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 9495 transitions. [2021-11-07 01:49:03,017 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 9495 transitions. Word has length 26 [2021-11-07 01:49:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:03,019 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 9495 transitions. [2021-11-07 01:49:03,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 9495 transitions. [2021-11-07 01:49:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:49:03,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:03,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:03,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:49:03,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:03,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1579316292, now seen corresponding path program 1 times [2021-11-07 01:49:03,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:03,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452587495] [2021-11-07 01:49:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:03,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:03,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:03,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:49:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:03,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:03,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:03,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452587495] [2021-11-07 01:49:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452587495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:03,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:03,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:03,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817709052] [2021-11-07 01:49:03,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:03,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:03,856 INFO L87 Difference]: Start difference. First operand 5040 states and 9495 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:04,117 INFO L93 Difference]: Finished difference Result 10067 states and 18971 transitions. [2021-11-07 01:49:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:04,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 28 [2021-11-07 01:49:04,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:04,153 INFO L225 Difference]: With dead ends: 10067 [2021-11-07 01:49:04,153 INFO L226 Difference]: Without dead ends: 5040 [2021-11-07 01:49:04,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-11-07 01:49:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 5040. [2021-11-07 01:49:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5040 states, 5035 states have (on average 1.8846077457795432) internal successors, (9489), 5039 states have internal predecessors, (9489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5040 states to 5040 states and 9489 transitions. [2021-11-07 01:49:04,334 INFO L78 Accepts]: Start accepts. Automaton has 5040 states and 9489 transitions. Word has length 28 [2021-11-07 01:49:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:04,334 INFO L470 AbstractCegarLoop]: Abstraction has 5040 states and 9489 transitions. [2021-11-07 01:49:04,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 5040 states and 9489 transitions. [2021-11-07 01:49:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:49:04,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:04,336 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] [2021-11-07 01:49:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:04,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:04,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash 495072838, now seen corresponding path program 1 times [2021-11-07 01:49:04,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:04,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181954053] [2021-11-07 01:49:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:04,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:04,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:04,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:04,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:49:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:04,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:04,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:05,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:05,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181954053] [2021-11-07 01:49:05,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181954053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:05,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:05,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:05,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329158118] [2021-11-07 01:49:05,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:05,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:05,079 INFO L87 Difference]: Start difference. First operand 5040 states and 9489 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:05,575 INFO L93 Difference]: Finished difference Result 10031 states and 18894 transitions. [2021-11-07 01:49:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 33 [2021-11-07 01:49:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:05,608 INFO L225 Difference]: With dead ends: 10031 [2021-11-07 01:49:05,608 INFO L226 Difference]: Without dead ends: 5013 [2021-11-07 01:49:05,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:49:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-11-07 01:49:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 5013. [2021-11-07 01:49:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5008 states have (on average 1.8835862619808306) internal successors, (9433), 5012 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 9433 transitions. [2021-11-07 01:49:05,810 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 9433 transitions. Word has length 33 [2021-11-07 01:49:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 5013 states and 9433 transitions. [2021-11-07 01:49:05,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 9433 transitions. [2021-11-07 01:49:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:49:05,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:05,812 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 01:49:05,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:06,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:06,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1082837096, now seen corresponding path program 1 times [2021-11-07 01:49:06,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:06,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502571502] [2021-11-07 01:49:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:06,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:06,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:06,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:49:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:06,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:06,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:06,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:06,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502571502] [2021-11-07 01:49:06,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502571502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:06,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:06,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:06,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635858477] [2021-11-07 01:49:06,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:06,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:06,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:06,606 INFO L87 Difference]: Start difference. First operand 5013 states and 9433 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 01:49:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:06,869 INFO L93 Difference]: Finished difference Result 10004 states and 18838 transitions. [2021-11-07 01:49:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 34 [2021-11-07 01:49:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:06,903 INFO L225 Difference]: With dead ends: 10004 [2021-11-07 01:49:06,903 INFO L226 Difference]: Without dead ends: 5013 [2021-11-07 01:49:06,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-11-07 01:49:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 5013. [2021-11-07 01:49:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5008 states have (on average 1.882388178913738) internal successors, (9427), 5012 states have internal predecessors, (9427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 9427 transitions. [2021-11-07 01:49:07,230 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 9427 transitions. Word has length 34 [2021-11-07 01:49:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:07,231 INFO L470 AbstractCegarLoop]: Abstraction has 5013 states and 9427 transitions. [2021-11-07 01:49:07,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 01:49:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 9427 transitions. [2021-11-07 01:49:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:49:07,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:07,235 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 01:49:07,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:07,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2109725255, now seen corresponding path program 1 times [2021-11-07 01:49:07,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:07,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947998665] [2021-11-07 01:49:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:07,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:07,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:07,451 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:07,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:49:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:07,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:49:07,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:07,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:08,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:08,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947998665] [2021-11-07 01:49:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947998665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:08,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:08,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:49:08,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561776357] [2021-11-07 01:49:08,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:49:08,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:49:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:08,109 INFO L87 Difference]: Start difference. First operand 5013 states and 9427 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:08,880 INFO L93 Difference]: Finished difference Result 9998 states and 18821 transitions. [2021-11-07 01:49:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:49:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:08,920 INFO L225 Difference]: With dead ends: 9998 [2021-11-07 01:49:08,920 INFO L226 Difference]: Without dead ends: 5010 [2021-11-07 01:49:08,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:49:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2021-11-07 01:49:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 5010. [2021-11-07 01:49:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5005 states have (on average 1.8819180819180819) internal successors, (9419), 5009 states have internal predecessors, (9419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 9419 transitions. [2021-11-07 01:49:09,202 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 9419 transitions. Word has length 39 [2021-11-07 01:49:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:09,203 INFO L470 AbstractCegarLoop]: Abstraction has 5010 states and 9419 transitions. [2021-11-07 01:49:09,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 9419 transitions. [2021-11-07 01:49:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:49:09,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:09,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:09,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:09,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:09,423 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1884692599, now seen corresponding path program 1 times [2021-11-07 01:49:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:09,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269388150] [2021-11-07 01:49:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:09,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:09,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:09,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:49:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:10,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:10,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:10,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269388150] [2021-11-07 01:49:10,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269388150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:10,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:10,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:49:10,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352933120] [2021-11-07 01:49:10,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:10,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:10,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:10,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:10,315 INFO L87 Difference]: Start difference. First operand 5010 states and 9419 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:11,076 INFO L93 Difference]: Finished difference Result 13664 states and 25771 transitions. [2021-11-07 01:49:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:11,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 01:49:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:11,112 INFO L225 Difference]: With dead ends: 13664 [2021-11-07 01:49:11,112 INFO L226 Difference]: Without dead ends: 11117 [2021-11-07 01:49:11,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11117 states. [2021-11-07 01:49:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11117 to 6616. [2021-11-07 01:49:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6616 states, 6611 states have (on average 1.884435032521555) internal successors, (12458), 6615 states have internal predecessors, (12458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6616 states to 6616 states and 12458 transitions. [2021-11-07 01:49:11,587 INFO L78 Accepts]: Start accepts. Automaton has 6616 states and 12458 transitions. Word has length 40 [2021-11-07 01:49:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:11,587 INFO L470 AbstractCegarLoop]: Abstraction has 6616 states and 12458 transitions. [2021-11-07 01:49:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 6616 states and 12458 transitions. [2021-11-07 01:49:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:49:11,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:11,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:11,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:11,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:11,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:11,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1187864016, now seen corresponding path program 1 times [2021-11-07 01:49:11,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:11,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189371963] [2021-11-07 01:49:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:11,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:11,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:11,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:11,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:49:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:12,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:12,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189371963] [2021-11-07 01:49:12,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189371963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:12,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:12,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 01:49:12,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059182539] [2021-11-07 01:49:12,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:49:12,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:49:12,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:12,663 INFO L87 Difference]: Start difference. First operand 6616 states and 12458 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:13,241 INFO L93 Difference]: Finished difference Result 12544 states and 23430 transitions. [2021-11-07 01:49:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:49:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:49:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:13,262 INFO L225 Difference]: With dead ends: 12544 [2021-11-07 01:49:13,263 INFO L226 Difference]: Without dead ends: 7173 [2021-11-07 01:49:13,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:49:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2021-11-07 01:49:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4905. [2021-11-07 01:49:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4900 states have (on average 1.8787755102040817) internal successors, (9206), 4904 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 9206 transitions. [2021-11-07 01:49:13,538 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 9206 transitions. Word has length 59 [2021-11-07 01:49:13,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:13,539 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 9206 transitions. [2021-11-07 01:49:13,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 9206 transitions. [2021-11-07 01:49:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:49:13,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:13,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:13,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:49:13,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:13,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash -775984150, now seen corresponding path program 1 times [2021-11-07 01:49:13,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:13,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798302913] [2021-11-07 01:49:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:13,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:13,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:13,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:13,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:49:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:14,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:14,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:14,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798302913] [2021-11-07 01:49:14,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798302913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:14,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:14,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:49:14,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214600474] [2021-11-07 01:49:14,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:14,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:14,654 INFO L87 Difference]: Start difference. First operand 4905 states and 9206 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:17,168 INFO L93 Difference]: Finished difference Result 18249 states and 34316 transitions. [2021-11-07 01:49:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:17,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:49:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:17,208 INFO L225 Difference]: With dead ends: 18249 [2021-11-07 01:49:17,208 INFO L226 Difference]: Without dead ends: 13378 [2021-11-07 01:49:17,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13378 states. [2021-11-07 01:49:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13378 to 4905. [2021-11-07 01:49:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4900 states have (on average 1.8440816326530611) internal successors, (9036), 4904 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 9036 transitions. [2021-11-07 01:49:17,594 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 9036 transitions. Word has length 60 [2021-11-07 01:49:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:17,594 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 9036 transitions. [2021-11-07 01:49:17,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 9036 transitions. [2021-11-07 01:49:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:49:17,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:17,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:17,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:17,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:17,811 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash 770168190, now seen corresponding path program 1 times [2021-11-07 01:49:17,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:17,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805226757] [2021-11-07 01:49:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:17,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:17,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:17,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:17,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:49:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:18,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:18,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:18,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:18,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:18,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805226757] [2021-11-07 01:49:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805226757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:18,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:18,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:49:18,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428553765] [2021-11-07 01:49:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:18,797 INFO L87 Difference]: Start difference. First operand 4905 states and 9036 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:20,279 INFO L93 Difference]: Finished difference Result 13936 states and 25867 transitions. [2021-11-07 01:49:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:49:20,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-07 01:49:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:20,304 INFO L225 Difference]: With dead ends: 13936 [2021-11-07 01:49:20,304 INFO L226 Difference]: Without dead ends: 9083 [2021-11-07 01:49:20,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:49:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-11-07 01:49:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 4837. [2021-11-07 01:49:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 4832 states have (on average 1.8443708609271523) internal successors, (8912), 4836 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 8912 transitions. [2021-11-07 01:49:20,726 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 8912 transitions. Word has length 68 [2021-11-07 01:49:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:20,726 INFO L470 AbstractCegarLoop]: Abstraction has 4837 states and 8912 transitions. [2021-11-07 01:49:20,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 8912 transitions. [2021-11-07 01:49:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:49:20,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:20,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:20,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:20,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:20,944 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1025799714, now seen corresponding path program 1 times [2021-11-07 01:49:20,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:20,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009686836] [2021-11-07 01:49:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:20,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:20,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:20,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:20,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:49:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:21,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:21,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009686836] [2021-11-07 01:49:21,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009686836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:21,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:21,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:21,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475562450] [2021-11-07 01:49:21,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:49:21,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:21,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:49:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:21,903 INFO L87 Difference]: Start difference. First operand 4837 states and 8912 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:23,951 INFO L93 Difference]: Finished difference Result 19210 states and 35567 transitions. [2021-11-07 01:49:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:49:23,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-07 01:49:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:23,983 INFO L225 Difference]: With dead ends: 19210 [2021-11-07 01:49:23,983 INFO L226 Difference]: Without dead ends: 14424 [2021-11-07 01:49:23,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14424 states. [2021-11-07 01:49:24,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14424 to 4845. [2021-11-07 01:49:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4840 states have (on average 1.8429752066115703) internal successors, (8920), 4844 states have internal predecessors, (8920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 8920 transitions. [2021-11-07 01:49:24,322 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 8920 transitions. Word has length 70 [2021-11-07 01:49:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:24,323 INFO L470 AbstractCegarLoop]: Abstraction has 4845 states and 8920 transitions. [2021-11-07 01:49:24,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 8920 transitions. [2021-11-07 01:49:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:49:24,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:24,327 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:24,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:24,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:24,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:24,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1476834457, now seen corresponding path program 1 times [2021-11-07 01:49:24,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:24,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378015143] [2021-11-07 01:49:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:24,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:24,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:24,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:49:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:25,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:25,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:25,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378015143] [2021-11-07 01:49:25,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378015143] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:25,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:25,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:25,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600851976] [2021-11-07 01:49:25,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:25,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:25,462 INFO L87 Difference]: Start difference. First operand 4845 states and 8920 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:27,344 INFO L93 Difference]: Finished difference Result 13857 states and 25616 transitions. [2021-11-07 01:49:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-07 01:49:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:27,362 INFO L225 Difference]: With dead ends: 13857 [2021-11-07 01:49:27,362 INFO L226 Difference]: Without dead ends: 9050 [2021-11-07 01:49:27,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2021-11-07 01:49:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 6214. [2021-11-07 01:49:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6209 states have (on average 1.8286358511837655) internal successors, (11354), 6213 states have internal predecessors, (11354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 11354 transitions. [2021-11-07 01:49:27,729 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 11354 transitions. Word has length 71 [2021-11-07 01:49:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:27,729 INFO L470 AbstractCegarLoop]: Abstraction has 6214 states and 11354 transitions. [2021-11-07 01:49:27,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 11354 transitions. [2021-11-07 01:49:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:49:27,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:27,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:27,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:27,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:27,951 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:27,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:27,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1865794529, now seen corresponding path program 1 times [2021-11-07 01:49:27,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:27,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841549719] [2021-11-07 01:49:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:27,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:27,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:27,953 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:27,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:49:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:28,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:28,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:28,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:28,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841549719] [2021-11-07 01:49:28,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841549719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:28,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:28,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:28,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607401609] [2021-11-07 01:49:28,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:49:28,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:49:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:28,884 INFO L87 Difference]: Start difference. First operand 6214 states and 11354 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:30,745 INFO L93 Difference]: Finished difference Result 46777 states and 85780 transitions. [2021-11-07 01:49:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:49:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:49:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:30,790 INFO L225 Difference]: With dead ends: 46777 [2021-11-07 01:49:30,790 INFO L226 Difference]: Without dead ends: 40610 [2021-11-07 01:49:30,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 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 01:49:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2021-11-07 01:49:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 11441. [2021-11-07 01:49:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11441 states, 11436 states have (on average 1.833770549143057) internal successors, (20971), 11440 states have internal predecessors, (20971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11441 states to 11441 states and 20971 transitions. [2021-11-07 01:49:31,658 INFO L78 Accepts]: Start accepts. Automaton has 11441 states and 20971 transitions. Word has length 73 [2021-11-07 01:49:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:31,659 INFO L470 AbstractCegarLoop]: Abstraction has 11441 states and 20971 transitions. [2021-11-07 01:49:31,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 11441 states and 20971 transitions. [2021-11-07 01:49:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:49:31,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:31,662 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:31,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:31,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:31,879 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1164194655, now seen corresponding path program 1 times [2021-11-07 01:49:31,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:31,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966489671] [2021-11-07 01:49:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:31,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:31,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:31,883 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:31,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:49:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:32,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:32,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:32,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:32,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966489671] [2021-11-07 01:49:32,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966489671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:32,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:32,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:49:32,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660817944] [2021-11-07 01:49:32,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:32,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:32,869 INFO L87 Difference]: Start difference. First operand 11441 states and 20971 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:34,189 INFO L93 Difference]: Finished difference Result 24150 states and 44294 transitions. [2021-11-07 01:49:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:49:34,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:49:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:34,210 INFO L225 Difference]: With dead ends: 24150 [2021-11-07 01:49:34,210 INFO L226 Difference]: Without dead ends: 17400 [2021-11-07 01:49:34,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:49:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2021-11-07 01:49:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 11425. [2021-11-07 01:49:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11425 states, 11420 states have (on average 1.83353765323993) internal successors, (20939), 11424 states have internal predecessors, (20939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11425 states to 11425 states and 20939 transitions. [2021-11-07 01:49:34,840 INFO L78 Accepts]: Start accepts. Automaton has 11425 states and 20939 transitions. Word has length 73 [2021-11-07 01:49:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:34,840 INFO L470 AbstractCegarLoop]: Abstraction has 11425 states and 20939 transitions. [2021-11-07 01:49:34,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 11425 states and 20939 transitions. [2021-11-07 01:49:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:49:34,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:34,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:34,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:35,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:35,057 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:35,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:35,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1468079589, now seen corresponding path program 1 times [2021-11-07 01:49:35,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:35,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436069920] [2021-11-07 01:49:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:35,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:35,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:35,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:35,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:49:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:35,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:35,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:36,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:36,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436069920] [2021-11-07 01:49:36,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436069920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:36,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:36,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:36,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777097293] [2021-11-07 01:49:36,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:49:36,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:49:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:36,070 INFO L87 Difference]: Start difference. First operand 11425 states and 20939 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:37,963 INFO L93 Difference]: Finished difference Result 45677 states and 84177 transitions. [2021-11-07 01:49:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:49:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:49:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:38,004 INFO L225 Difference]: With dead ends: 45677 [2021-11-07 01:49:38,004 INFO L226 Difference]: Without dead ends: 38939 [2021-11-07 01:49:38,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 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 01:49:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38939 states. [2021-11-07 01:49:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38939 to 17614. [2021-11-07 01:49:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17614 states, 17609 states have (on average 1.832244874779942) internal successors, (32264), 17613 states have internal predecessors, (32264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17614 states to 17614 states and 32264 transitions. [2021-11-07 01:49:38,773 INFO L78 Accepts]: Start accepts. Automaton has 17614 states and 32264 transitions. Word has length 75 [2021-11-07 01:49:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:38,774 INFO L470 AbstractCegarLoop]: Abstraction has 17614 states and 32264 transitions. [2021-11-07 01:49:38,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 17614 states and 32264 transitions. [2021-11-07 01:49:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:49:38,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:38,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:38,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:49:39,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,002 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:39,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 166721479, now seen corresponding path program 1 times [2021-11-07 01:49:39,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:39,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960959051] [2021-11-07 01:49:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:39,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:39,005 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:39,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:49:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:39,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:39,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:39,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:40,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:40,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960959051] [2021-11-07 01:49:40,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960959051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:40,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:40,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:49:40,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784666059] [2021-11-07 01:49:40,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:40,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:40,216 INFO L87 Difference]: Start difference. First operand 17614 states and 32264 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:45,652 INFO L93 Difference]: Finished difference Result 97579 states and 179846 transitions. [2021-11-07 01:49:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:49:45,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:49:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:45,746 INFO L225 Difference]: With dead ends: 97579 [2021-11-07 01:49:45,746 INFO L226 Difference]: Without dead ends: 84652 [2021-11-07 01:49:45,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:49:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84652 states. [2021-11-07 01:49:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84652 to 28564. [2021-11-07 01:49:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28564 states, 28559 states have (on average 1.8399803914702895) internal successors, (52548), 28563 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28564 states to 28564 states and 52548 transitions. [2021-11-07 01:49:47,577 INFO L78 Accepts]: Start accepts. Automaton has 28564 states and 52548 transitions. Word has length 77 [2021-11-07 01:49:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:47,578 INFO L470 AbstractCegarLoop]: Abstraction has 28564 states and 52548 transitions. [2021-11-07 01:49:47,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 28564 states and 52548 transitions. [2021-11-07 01:49:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:49:47,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:47,582 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:47,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:49:47,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:47,795 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash -83573634, now seen corresponding path program 1 times [2021-11-07 01:49:47,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:47,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800285108] [2021-11-07 01:49:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:47,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:47,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:47,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:47,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:49:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:48,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:48,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:48,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:48,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800285108] [2021-11-07 01:49:48,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800285108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:48,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:48,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:48,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178523875] [2021-11-07 01:49:48,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:48,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:48,918 INFO L87 Difference]: Start difference. First operand 28564 states and 52548 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:50,809 INFO L93 Difference]: Finished difference Result 52573 states and 96587 transitions. [2021-11-07 01:49:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 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 84 [2021-11-07 01:49:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:50,843 INFO L225 Difference]: With dead ends: 52573 [2021-11-07 01:49:50,843 INFO L226 Difference]: Without dead ends: 28579 [2021-11-07 01:49:50,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:49:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28579 states. [2021-11-07 01:49:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28579 to 28564. [2021-11-07 01:49:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28564 states, 28559 states have (on average 1.833117406071641) internal successors, (52352), 28563 states have internal predecessors, (52352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28564 states to 28564 states and 52352 transitions. [2021-11-07 01:49:52,406 INFO L78 Accepts]: Start accepts. Automaton has 28564 states and 52352 transitions. Word has length 84 [2021-11-07 01:49:52,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:52,406 INFO L470 AbstractCegarLoop]: Abstraction has 28564 states and 52352 transitions. [2021-11-07 01:49:52,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28564 states and 52352 transitions. [2021-11-07 01:49:52,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:49:52,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:52,409 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:52,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:52,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:52,610 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:49:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash -562823902, now seen corresponding path program 1 times [2021-11-07 01:49:52,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:52,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2557288] [2021-11-07 01:49:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:52,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:52,612 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:52,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:49:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:53,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:53,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:53,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:53,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:53,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2557288] [2021-11-07 01:49:53,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2557288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:53,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:53,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:49:53,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378974178] [2021-11-07 01:49:53,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:53,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:53,871 INFO L87 Difference]: Start difference. First operand 28564 states and 52352 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:58,729 INFO L93 Difference]: Finished difference Result 83105 states and 152092 transitions. [2021-11-07 01:49:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:49:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 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 85 [2021-11-07 01:49:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:58,808 INFO L225 Difference]: With dead ends: 83105 [2021-11-07 01:49:58,808 INFO L226 Difference]: Without dead ends: 59449 [2021-11-07 01:49:58,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:49:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59449 states. [2021-11-07 01:50:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59449 to 23780. [2021-11-07 01:50:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23780 states, 23775 states have (on average 1.823385909568875) internal successors, (43351), 23779 states have internal predecessors, (43351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23780 states to 23780 states and 43351 transitions. [2021-11-07 01:50:00,655 INFO L78 Accepts]: Start accepts. Automaton has 23780 states and 43351 transitions. Word has length 85 [2021-11-07 01:50:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:00,656 INFO L470 AbstractCegarLoop]: Abstraction has 23780 states and 43351 transitions. [2021-11-07 01:50:00,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 23780 states and 43351 transitions. [2021-11-07 01:50:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:50:00,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:00,658 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:00,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:00,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:00,860 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:50:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1149629916, now seen corresponding path program 1 times [2021-11-07 01:50:00,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:00,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764002072] [2021-11-07 01:50:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:00,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:00,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:00,862 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:00,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:50:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:01,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:01,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:02,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:02,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764002072] [2021-11-07 01:50:02,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764002072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:02,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:02,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:50:02,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051419437] [2021-11-07 01:50:02,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:50:02,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:50:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:50:02,072 INFO L87 Difference]: Start difference. First operand 23780 states and 43351 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:06,033 INFO L93 Difference]: Finished difference Result 91277 states and 166405 transitions. [2021-11-07 01:50:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:50:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 85 [2021-11-07 01:50:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:06,118 INFO L225 Difference]: With dead ends: 91277 [2021-11-07 01:50:06,118 INFO L226 Difference]: Without dead ends: 67706 [2021-11-07 01:50:06,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:50:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67706 states. [2021-11-07 01:50:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67706 to 67676. [2021-11-07 01:50:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67676 states, 67671 states have (on average 1.8186076753705427) internal successors, (123067), 67675 states have internal predecessors, (123067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67676 states to 67676 states and 123067 transitions. [2021-11-07 01:50:10,093 INFO L78 Accepts]: Start accepts. Automaton has 67676 states and 123067 transitions. Word has length 85 [2021-11-07 01:50:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:10,093 INFO L470 AbstractCegarLoop]: Abstraction has 67676 states and 123067 transitions. [2021-11-07 01:50:10,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 67676 states and 123067 transitions. [2021-11-07 01:50:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:50:10,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:10,096 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:10,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:10,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:10,297 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:50:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1484252967, now seen corresponding path program 1 times [2021-11-07 01:50:10,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:10,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606987811] [2021-11-07 01:50:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:10,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:10,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:10,300 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:10,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74af37e3-7ae7-4a43-b537-736cefe06ae2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:50:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:11,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:11,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:11,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606987811] [2021-11-07 01:50:11,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606987811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:11,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:11,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:50:11,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458819843] [2021-11-07 01:50:11,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:50:11,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:50:11,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:50:11,547 INFO L87 Difference]: Start difference. First operand 67676 states and 123067 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)