./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH --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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:31:30,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:31:30,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:31:30,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:31:30,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:31:30,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:31:30,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:31:30,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:31:30,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:31:30,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:31:30,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:31:30,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:31:30,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:31:30,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:31:30,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:31:30,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:31:30,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:31:30,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:31:30,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:31:30,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:31:30,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:31:30,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:31:30,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:31:30,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:31:30,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:31:30,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:31:30,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:31:30,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:31:30,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:31:30,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:31:30,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:31:30,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:31:30,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:31:30,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:31:30,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:31:30,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:31:30,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:31:30,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:31:30,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:31:30,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:31:30,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:31:30,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:31:30,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:31:30,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:31:30,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:31:30,755 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:31:30,755 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:31:30,755 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:31:30,756 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:31:30,756 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:31:30,756 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:31:30,756 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:31:30,757 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:31:30,757 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:31:30,757 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:31:30,758 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:31:30,758 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:31:30,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:31:30,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:31:30,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:31:30,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:31:30,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:31:30,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:31:30,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:31:30,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:31:30,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:31:30,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:31:30,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:31:30,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:31:30,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:31:30,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:31:30,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:31:30,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:31:30,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:31:30,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:31:30,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:31:30,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:31:30,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:31:30,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:31:30,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:31:30,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:31:30,766 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_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-03 04:31:30,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:31:31,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:31:31,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:31:31,041 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:31:31,044 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:31:31,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-03 04:31:31,128 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/3a1fbdd47/32937762289b4b9ca6cb76084ec21393/FLAGe5914c0c9 [2021-11-03 04:31:31,765 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:31:31,766 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-03 04:31:31,798 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/3a1fbdd47/32937762289b4b9ca6cb76084ec21393/FLAGe5914c0c9 [2021-11-03 04:31:32,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/3a1fbdd47/32937762289b4b9ca6cb76084ec21393 [2021-11-03 04:31:32,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:31:32,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:31:32,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:32,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:31:32,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:31:32,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:32" (1/1) ... [2021-11-03 04:31:32,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3751ddf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:32, skipping insertion in model container [2021-11-03 04:31:32,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:32" (1/1) ... [2021-11-03 04:31:32,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:31:32,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:31:32,378 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_7b389984-cfc4-4cdc-9e1f-f91164d901e8/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-03 04:31:32,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:32,709 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) [2021-11-03 04:31:32,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2000b556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:32, skipping insertion in model container [2021-11-03 04:31:32,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:32,710 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:31:32,712 INFO L168 Benchmark]: Toolchain (without parser) took 684.50 ms. Allocated memory is still 107.0 MB. Free memory was 69.0 MB in the beginning and 67.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:31:32,713 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 51.2 MB in the beginning and 51.1 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:31:32,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 677.80 ms. Allocated memory is still 107.0 MB. Free memory was 68.8 MB in the beginning and 67.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:31:32,716 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 51.2 MB in the beginning and 51.1 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 677.80 ms. Allocated memory is still 107.0 MB. Free memory was 68.8 MB in the beginning and 67.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3079]: 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_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH --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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:31:34,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:31:34,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:31:34,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:31:34,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:31:34,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:31:34,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:31:34,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:31:34,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:31:34,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:31:34,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:31:34,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:31:34,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:31:34,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:31:34,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:31:34,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:31:34,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:31:34,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:31:34,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:31:34,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:31:34,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:31:34,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:31:34,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:31:34,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:31:34,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:31:34,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:31:34,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:31:34,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:31:34,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:31:34,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:31:34,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:31:34,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:31:34,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:31:34,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:31:34,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:31:34,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:31:34,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:31:34,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:31:34,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:31:34,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:31:34,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:31:34,999 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:31:35,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:31:35,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:31:35,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:31:35,048 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:31:35,048 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:31:35,048 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:31:35,048 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:31:35,049 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:31:35,049 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:31:35,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:31:35,052 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:31:35,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:31:35,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:31:35,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:31:35,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:31:35,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:31:35,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:31:35,054 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:31:35,054 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:31:35,055 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:31:35,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:31:35,055 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:31:35,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:31:35,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:31:35,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:31:35,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:31:35,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:31:35,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:31:35,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:31:35,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:31:35,058 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:31:35,058 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:35,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:31:35,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:31:35,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:31:35,059 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_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-03 04:31:35,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:31:35,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:31:35,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:31:35,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:31:35,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:31:35,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-03 04:31:35,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/d9423e357/456c81100b1d4b8188c08120a2d4a1f3/FLAGddf9ada1b [2021-11-03 04:31:36,305 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:31:36,312 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-03 04:31:36,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/d9423e357/456c81100b1d4b8188c08120a2d4a1f3/FLAGddf9ada1b [2021-11-03 04:31:36,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/data/d9423e357/456c81100b1d4b8188c08120a2d4a1f3 [2021-11-03 04:31:36,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:31:36,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:31:36,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:36,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:31:36,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:31:36,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:36" (1/1) ... [2021-11-03 04:31:36,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3221a129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:36, skipping insertion in model container [2021-11-03 04:31:36,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:31:36" (1/1) ... [2021-11-03 04:31:36,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:31:36,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:31:36,837 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_7b389984-cfc4-4cdc-9e1f-f91164d901e8/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-03 04:31:37,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:37,237 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:31:37,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:31:37,279 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_7b389984-cfc4-4cdc-9e1f-f91164d901e8/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-03 04:31:37,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:37,433 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:31:37,449 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_7b389984-cfc4-4cdc-9e1f-f91164d901e8/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-03 04:31:37,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:31:37,618 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:31:37,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37 WrapperNode [2021-11-03 04:31:37,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:31:37,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:31:37,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:31:37,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:31:37,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:37,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:37,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:31:37,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:31:37,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:31:37,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:31:37,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:37,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:37,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:37,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:38,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:38,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:38,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:38,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:31:38,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:31:38,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:31:38,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:31:38,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (1/1) ... [2021-11-03 04:31:38,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:31:38,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:31:38,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:31:38,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:31:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:31:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:31:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:31:38,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:31:49,049 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:31:49,050 INFO L299 CfgBuilder]: Removed 809 assume(true) statements. [2021-11-03 04:31:49,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:31:49 BoogieIcfgContainer [2021-11-03 04:31:49,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:31:49,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:31:49,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:31:49,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:31:49,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:31:36" (1/3) ... [2021-11-03 04:31:49,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49315b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:31:49, skipping insertion in model container [2021-11-03 04:31:49,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:31:37" (2/3) ... [2021-11-03 04:31:49,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49315b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:31:49, skipping insertion in model container [2021-11-03 04:31:49,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:31:49" (3/3) ... [2021-11-03 04:31:49,064 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2021-11-03 04:31:49,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:31:49,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:31:49,151 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:31:49,157 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 [2021-11-03 04:31:49,157 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:31:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 3565 states, 3559 states have (on average 1.89098061253161) internal successors, (6730), 3564 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:31:49,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:49,281 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:49,282 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)] === [2021-11-03 04:31:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash -347031252, now seen corresponding path program 1 times [2021-11-03 04:31:49,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:49,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648927580] [2021-11-03 04:31:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:49,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:49,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:49,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:31:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:49,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:31:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:49,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:50,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:50,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648927580] [2021-11-03 04:31:50,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648927580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:50,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:31:50,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989132089] [2021-11-03 04:31:50,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:31:50,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:31:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:31:50,076 INFO L87 Difference]: Start difference. First operand has 3565 states, 3559 states have (on average 1.89098061253161) internal successors, (6730), 3564 states have internal predecessors, (6730), 0 states have call successors, (0), 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 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:50,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:50,219 INFO L93 Difference]: Finished difference Result 3584 states and 6753 transitions. [2021-11-03 04:31:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:31:50,220 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 04:31:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:50,269 INFO L225 Difference]: With dead ends: 3584 [2021-11-03 04:31:50,269 INFO L226 Difference]: Without dead ends: 3561 [2021-11-03 04:31:50,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:31:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-11-03 04:31:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 3561. [2021-11-03 04:31:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3556 states have (on average 1.8892013498312712) internal successors, (6718), 3560 states have internal predecessors, (6718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 6718 transitions. [2021-11-03 04:31:50,489 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 6718 transitions. Word has length 52 [2021-11-03 04:31:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:50,490 INFO L470 AbstractCegarLoop]: Abstraction has 3561 states and 6718 transitions. [2021-11-03 04:31:50,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 6718 transitions. [2021-11-03 04:31:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:31:50,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:50,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:50,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:50,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:50,712 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)] === [2021-11-03 04:31:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1255886491, now seen corresponding path program 1 times [2021-11-03 04:31:50,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:50,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329775336] [2021-11-03 04:31:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:50,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:50,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:50,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:50,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:31:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:51,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:51,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:51,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329775336] [2021-11-03 04:31:51,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329775336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:51,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:51,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:31:51,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886905401] [2021-11-03 04:31:51,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:51,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:51,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:51,402 INFO L87 Difference]: Start difference. First operand 3561 states and 6718 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:51,960 INFO L93 Difference]: Finished difference Result 10603 states and 20011 transitions. [2021-11-03 04:31:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 04:31:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:52,006 INFO L225 Difference]: With dead ends: 10603 [2021-11-03 04:31:52,006 INFO L226 Difference]: Without dead ends: 7055 [2021-11-03 04:31:52,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7055 states. [2021-11-03 04:31:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7055 to 3561. [2021-11-03 04:31:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3556 states have (on average 1.8872328458942633) internal successors, (6711), 3560 states have internal predecessors, (6711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 6711 transitions. [2021-11-03 04:31:52,200 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 6711 transitions. Word has length 54 [2021-11-03 04:31:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:52,201 INFO L470 AbstractCegarLoop]: Abstraction has 3561 states and 6711 transitions. [2021-11-03 04:31:52,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 6711 transitions. [2021-11-03 04:31:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:31:52,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:52,214 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] [2021-11-03 04:31:52,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:52,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:52,430 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)] === [2021-11-03 04:31:52,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash -322695074, now seen corresponding path program 1 times [2021-11-03 04:31:52,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:52,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125610271] [2021-11-03 04:31:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:52,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:52,433 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:52,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:31:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:52,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:31:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:53,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:53,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:53,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125610271] [2021-11-03 04:31:53,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125610271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:53,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:53,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:31:53,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069816359] [2021-11-03 04:31:53,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:53,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:53,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:53,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:31:53,235 INFO L87 Difference]: Start difference. First operand 3561 states and 6711 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:54,688 INFO L93 Difference]: Finished difference Result 24402 states and 46029 transitions. [2021-11-03 04:31:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:31:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:31:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:54,816 INFO L225 Difference]: With dead ends: 24402 [2021-11-03 04:31:54,817 INFO L226 Difference]: Without dead ends: 20863 [2021-11-03 04:31:54,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:31:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20863 states. [2021-11-03 04:31:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20863 to 3539. [2021-11-03 04:31:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 3534 states have (on average 1.8845500848896435) internal successors, (6660), 3538 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 6660 transitions. [2021-11-03 04:31:55,187 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 6660 transitions. Word has length 60 [2021-11-03 04:31:55,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:55,188 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 6660 transitions. [2021-11-03 04:31:55,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:55,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 6660 transitions. [2021-11-03 04:31:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:31:55,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:55,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:55,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:55,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:55,409 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)] === [2021-11-03 04:31:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1416716573, now seen corresponding path program 1 times [2021-11-03 04:31:55,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:55,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697017379] [2021-11-03 04:31:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:55,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:55,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:55,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:55,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:31:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:31:55,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:56,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:56,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:56,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697017379] [2021-11-03 04:31:56,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697017379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:56,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:56,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:31:56,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745701368] [2021-11-03 04:31:56,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:31:56,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:31:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:56,175 INFO L87 Difference]: Start difference. First operand 3539 states and 6660 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:56,762 INFO L93 Difference]: Finished difference Result 10514 states and 19815 transitions. [2021-11-03 04:31:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:31:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:31:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:56,783 INFO L225 Difference]: With dead ends: 10514 [2021-11-03 04:31:56,783 INFO L226 Difference]: Without dead ends: 6997 [2021-11-03 04:31:56,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:31:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6997 states. [2021-11-03 04:31:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6997 to 3539. [2021-11-03 04:31:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 3534 states have (on average 1.8814374646293153) internal successors, (6649), 3538 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 6649 transitions. [2021-11-03 04:31:56,988 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 6649 transitions. Word has length 62 [2021-11-03 04:31:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:56,989 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 6649 transitions. [2021-11-03 04:31:56,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 6649 transitions. [2021-11-03 04:31:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:31:56,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:56,994 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] [2021-11-03 04:31:57,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:57,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,212 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)] === [2021-11-03 04:31:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash 237083176, now seen corresponding path program 1 times [2021-11-03 04:31:57,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:57,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256820276] [2021-11-03 04:31:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:57,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:57,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:57,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:31:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:31:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:58,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:58,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256820276] [2021-11-03 04:31:58,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256820276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:58,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:58,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:31:58,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726855872] [2021-11-03 04:31:58,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:31:58,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:31:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:31:58,036 INFO L87 Difference]: Start difference. First operand 3539 states and 6649 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:00,674 INFO L93 Difference]: Finished difference Result 38173 states and 71973 transitions. [2021-11-03 04:32:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:32:00,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-11-03 04:32:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:00,766 INFO L225 Difference]: With dead ends: 38173 [2021-11-03 04:32:00,766 INFO L226 Difference]: Without dead ends: 34659 [2021-11-03 04:32:00,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:32:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34659 states. [2021-11-03 04:32:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34659 to 3541. [2021-11-03 04:32:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3536 states have (on average 1.879524886877828) internal successors, (6646), 3540 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 6646 transitions. [2021-11-03 04:32:01,239 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 6646 transitions. Word has length 68 [2021-11-03 04:32:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:01,239 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 6646 transitions. [2021-11-03 04:32:01,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 6646 transitions. [2021-11-03 04:32:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:32:01,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:01,244 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] [2021-11-03 04:32:01,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:01,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:01,460 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)] === [2021-11-03 04:32:01,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash -495532427, now seen corresponding path program 1 times [2021-11-03 04:32:01,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:01,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422140021] [2021-11-03 04:32:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:01,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:01,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:01,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:32:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:01,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:32:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:02,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:02,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:02,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422140021] [2021-11-03 04:32:02,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422140021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:02,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:02,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:32:02,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937453049] [2021-11-03 04:32:02,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:32:02,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:32:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:02,284 INFO L87 Difference]: Start difference. First operand 3541 states and 6646 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:04,833 INFO L93 Difference]: Finished difference Result 38141 states and 71894 transitions. [2021-11-03 04:32:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:32:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2021-11-03 04:32:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:04,914 INFO L225 Difference]: With dead ends: 38141 [2021-11-03 04:32:04,915 INFO L226 Difference]: Without dead ends: 34627 [2021-11-03 04:32:04,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:32:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34627 states. [2021-11-03 04:32:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34627 to 3545. [2021-11-03 04:32:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3540 states have (on average 1.8782485875706214) internal successors, (6649), 3544 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 6649 transitions. [2021-11-03 04:32:05,304 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 6649 transitions. Word has length 70 [2021-11-03 04:32:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 3545 states and 6649 transitions. [2021-11-03 04:32:05,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:05,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 6649 transitions. [2021-11-03 04:32:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:32:05,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:05,309 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] [2021-11-03 04:32:05,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:05,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:05,517 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)] === [2021-11-03 04:32:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash -729377368, now seen corresponding path program 1 times [2021-11-03 04:32:05,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:05,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245787611] [2021-11-03 04:32:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:05,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:05,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:05,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:32:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:05,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:32:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:06,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:06,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:06,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245787611] [2021-11-03 04:32:06,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245787611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:06,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:06,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:32:06,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726604280] [2021-11-03 04:32:06,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:06,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:06,294 INFO L87 Difference]: Start difference. First operand 3545 states and 6649 transitions. Second operand has 4 states, 4 states have (on average 18.75) 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) [2021-11-03 04:32:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:06,454 INFO L93 Difference]: Finished difference Result 7038 states and 13229 transitions. [2021-11-03 04:32:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) 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 72 [2021-11-03 04:32:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:06,498 INFO L225 Difference]: With dead ends: 7038 [2021-11-03 04:32:06,498 INFO L226 Difference]: Without dead ends: 3524 [2021-11-03 04:32:06,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-11-03 04:32:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 3524. [2021-11-03 04:32:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3519 states have (on average 1.878658709860756) internal successors, (6611), 3523 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 6611 transitions. [2021-11-03 04:32:06,706 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 6611 transitions. Word has length 72 [2021-11-03 04:32:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:06,707 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 6611 transitions. [2021-11-03 04:32:06,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) 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) [2021-11-03 04:32:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 6611 transitions. [2021-11-03 04:32:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:32:06,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:06,713 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] [2021-11-03 04:32:06,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:06,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:06,929 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)] === [2021-11-03 04:32:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:06,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2123304368, now seen corresponding path program 1 times [2021-11-03 04:32:06,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:06,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522904540] [2021-11-03 04:32:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:06,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:06,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:06,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:06,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:32:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:32:07,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:07,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:07,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:07,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522904540] [2021-11-03 04:32:07,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522904540] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:07,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:07,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:32:07,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785405214] [2021-11-03 04:32:07,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:32:07,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:32:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:32:07,736 INFO L87 Difference]: Start difference. First operand 3524 states and 6611 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:07,910 INFO L93 Difference]: Finished difference Result 6982 states and 13132 transitions. [2021-11-03 04:32:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2021-11-03 04:32:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:07,916 INFO L225 Difference]: With dead ends: 6982 [2021-11-03 04:32:07,917 INFO L226 Difference]: Without dead ends: 3499 [2021-11-03 04:32:07,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3499 states. [2021-11-03 04:32:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3499 to 3499. [2021-11-03 04:32:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 3494 states have (on average 1.8795077275329135) internal successors, (6567), 3498 states have internal predecessors, (6567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 6567 transitions. [2021-11-03 04:32:08,143 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 6567 transitions. Word has length 73 [2021-11-03 04:32:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:08,144 INFO L470 AbstractCegarLoop]: Abstraction has 3499 states and 6567 transitions. [2021-11-03 04:32:08,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:08,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 6567 transitions. [2021-11-03 04:32:08,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:32:08,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:08,152 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] [2021-11-03 04:32:08,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 04:32:08,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:08,357 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)] === [2021-11-03 04:32:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash -192102503, now seen corresponding path program 1 times [2021-11-03 04:32:08,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:08,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105789053] [2021-11-03 04:32:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:08,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:08,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:08,359 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:08,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:32:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:32:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:09,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:09,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:09,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105789053] [2021-11-03 04:32:09,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105789053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:09,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:09,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:32:09,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927172054] [2021-11-03 04:32:09,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:09,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:09,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:09,278 INFO L87 Difference]: Start difference. First operand 3499 states and 6567 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:09,441 INFO L93 Difference]: Finished difference Result 6957 states and 13088 transitions. [2021-11-03 04:32:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:32:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 74 [2021-11-03 04:32:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:09,446 INFO L225 Difference]: With dead ends: 6957 [2021-11-03 04:32:09,446 INFO L226 Difference]: Without dead ends: 3496 [2021-11-03 04:32:09,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-03 04:32:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3496. [2021-11-03 04:32:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3491 states have (on average 1.8788312804354053) internal successors, (6559), 3495 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 6559 transitions. [2021-11-03 04:32:09,653 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 6559 transitions. Word has length 74 [2021-11-03 04:32:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:09,654 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 6559 transitions. [2021-11-03 04:32:09,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 6559 transitions. [2021-11-03 04:32:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:32:09,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:09,658 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] [2021-11-03 04:32:09,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:09,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:09,874 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)] === [2021-11-03 04:32:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:09,874 INFO L85 PathProgramCache]: Analyzing trace with hash -953941110, now seen corresponding path program 1 times [2021-11-03 04:32:09,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:09,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422634197] [2021-11-03 04:32:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:09,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:09,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:09,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:09,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:32:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:32:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:10,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:10,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:10,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422634197] [2021-11-03 04:32:10,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422634197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:10,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:10,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:32:10,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224263576] [2021-11-03 04:32:10,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:32:10,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:10,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:32:10,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:10,764 INFO L87 Difference]: Start difference. First operand 3496 states and 6559 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:10,981 INFO L93 Difference]: Finished difference Result 6948 states and 13070 transitions. [2021-11-03 04:32:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 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 [2021-11-03 04:32:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:10,986 INFO L225 Difference]: With dead ends: 6948 [2021-11-03 04:32:10,986 INFO L226 Difference]: Without dead ends: 3494 [2021-11-03 04:32:10,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:32:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2021-11-03 04:32:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3494. [2021-11-03 04:32:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3489 states have (on average 1.878188592719977) internal successors, (6553), 3493 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 6553 transitions. [2021-11-03 04:32:11,208 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 6553 transitions. Word has length 75 [2021-11-03 04:32:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:11,209 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 6553 transitions. [2021-11-03 04:32:11,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 6553 transitions. [2021-11-03 04:32:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:32:11,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:11,213 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] [2021-11-03 04:32:11,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:11,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:11,437 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)] === [2021-11-03 04:32:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:11,437 INFO L85 PathProgramCache]: Analyzing trace with hash 461884350, now seen corresponding path program 1 times [2021-11-03 04:32:11,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:11,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557761531] [2021-11-03 04:32:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:11,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:11,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:11,439 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:11,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:32:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:32:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:12,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:12,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:12,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557761531] [2021-11-03 04:32:12,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557761531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:12,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:12,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:32:12,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823751044] [2021-11-03 04:32:12,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:32:12,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:32:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:12,354 INFO L87 Difference]: Start difference. First operand 3494 states and 6553 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 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) [2021-11-03 04:32:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:12,600 INFO L93 Difference]: Finished difference Result 6941 states and 13055 transitions. [2021-11-03 04:32:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:12,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 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 76 [2021-11-03 04:32:12,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:12,605 INFO L225 Difference]: With dead ends: 6941 [2021-11-03 04:32:12,605 INFO L226 Difference]: Without dead ends: 3492 [2021-11-03 04:32:12,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:32:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-11-03 04:32:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3492. [2021-11-03 04:32:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3487 states have (on average 1.877545167765988) internal successors, (6547), 3491 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 6547 transitions. [2021-11-03 04:32:12,891 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 6547 transitions. Word has length 76 [2021-11-03 04:32:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:12,891 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 6547 transitions. [2021-11-03 04:32:12,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 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) [2021-11-03 04:32:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 6547 transitions. [2021-11-03 04:32:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:32:12,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:12,895 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] [2021-11-03 04:32:12,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:13,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:13,109 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)] === [2021-11-03 04:32:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1274391233, now seen corresponding path program 1 times [2021-11-03 04:32:13,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:13,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379107801] [2021-11-03 04:32:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:13,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:13,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:13,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:13,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:32:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:32:13,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:14,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:15,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:15,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379107801] [2021-11-03 04:32:15,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379107801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:15,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:15,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:32:15,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736257385] [2021-11-03 04:32:15,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:32:15,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:32:15,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:32:15,726 INFO L87 Difference]: Start difference. First operand 3492 states and 6547 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:19,120 INFO L93 Difference]: Finished difference Result 11085 states and 20881 transitions. [2021-11-03 04:32:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 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 [2021-11-03 04:32:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:19,139 INFO L225 Difference]: With dead ends: 11085 [2021-11-03 04:32:19,139 INFO L226 Difference]: Without dead ends: 7655 [2021-11-03 04:32:19,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:32:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7655 states. [2021-11-03 04:32:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7655 to 4980. [2021-11-03 04:32:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4975 states have (on average 1.8812060301507538) internal successors, (9359), 4979 states have internal predecessors, (9359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 9359 transitions. [2021-11-03 04:32:19,522 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 9359 transitions. Word has length 77 [2021-11-03 04:32:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:19,522 INFO L470 AbstractCegarLoop]: Abstraction has 4980 states and 9359 transitions. [2021-11-03 04:32:19,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 9359 transitions. [2021-11-03 04:32:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:32:19,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:19,525 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] [2021-11-03 04:32:19,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:19,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:19,733 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)] === [2021-11-03 04:32:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash 285573165, now seen corresponding path program 1 times [2021-11-03 04:32:19,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:19,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763370703] [2021-11-03 04:32:19,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:19,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:19,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:19,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:19,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:32:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:32:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:20,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:20,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:20,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763370703] [2021-11-03 04:32:20,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763370703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:20,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:20,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:32:20,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064727597] [2021-11-03 04:32:20,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:20,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:20,831 INFO L87 Difference]: Start difference. First operand 4980 states and 9359 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:24,609 INFO L93 Difference]: Finished difference Result 21158 states and 39673 transitions. [2021-11-03 04:32:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:32:24,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-03 04:32:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:24,630 INFO L225 Difference]: With dead ends: 21158 [2021-11-03 04:32:24,630 INFO L226 Difference]: Without dead ends: 16239 [2021-11-03 04:32:24,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:32:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16239 states. [2021-11-03 04:32:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16239 to 4986. [2021-11-03 04:32:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4986 states, 4981 states have (on average 1.8801445492872917) internal successors, (9365), 4985 states have internal predecessors, (9365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4986 states to 4986 states and 9365 transitions. [2021-11-03 04:32:25,015 INFO L78 Accepts]: Start accepts. Automaton has 4986 states and 9365 transitions. Word has length 78 [2021-11-03 04:32:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:25,015 INFO L470 AbstractCegarLoop]: Abstraction has 4986 states and 9365 transitions. [2021-11-03 04:32:25,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4986 states and 9365 transitions. [2021-11-03 04:32:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:32:25,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:25,019 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] [2021-11-03 04:32:25,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:25,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:25,225 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)] === [2021-11-03 04:32:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1667607363, now seen corresponding path program 1 times [2021-11-03 04:32:25,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:25,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812570566] [2021-11-03 04:32:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:25,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:25,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:25,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:25,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:32:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:32:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:26,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:26,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:26,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812570566] [2021-11-03 04:32:26,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812570566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:26,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:26,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:32:26,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465515290] [2021-11-03 04:32:26,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:26,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:26,281 INFO L87 Difference]: Start difference. First operand 4986 states and 9365 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:34,304 INFO L93 Difference]: Finished difference Result 17066 states and 32056 transitions. [2021-11-03 04:32:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:32:34,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 79 [2021-11-03 04:32:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:34,319 INFO L225 Difference]: With dead ends: 17066 [2021-11-03 04:32:34,319 INFO L226 Difference]: Without dead ends: 13694 [2021-11-03 04:32:34,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:32:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13694 states. [2021-11-03 04:32:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13694 to 8596. [2021-11-03 04:32:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8596 states, 8591 states have (on average 1.8777790711209406) internal successors, (16132), 8595 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8596 states to 8596 states and 16132 transitions. [2021-11-03 04:32:34,888 INFO L78 Accepts]: Start accepts. Automaton has 8596 states and 16132 transitions. Word has length 79 [2021-11-03 04:32:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:34,888 INFO L470 AbstractCegarLoop]: Abstraction has 8596 states and 16132 transitions. [2021-11-03 04:32:34,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 8596 states and 16132 transitions. [2021-11-03 04:32:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 04:32:34,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:34,893 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] [2021-11-03 04:32:34,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:35,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:35,102 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)] === [2021-11-03 04:32:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1761612684, now seen corresponding path program 1 times [2021-11-03 04:32:35,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:35,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531544595] [2021-11-03 04:32:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:35,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:35,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:35,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:35,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:32:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:32:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:36,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:36,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:36,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531544595] [2021-11-03 04:32:36,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531544595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:36,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:36,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:32:36,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947700509] [2021-11-03 04:32:36,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:32:36,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:32:36,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:32:36,356 INFO L87 Difference]: Start difference. First operand 8596 states and 16132 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:39,762 INFO L93 Difference]: Finished difference Result 20506 states and 38295 transitions. [2021-11-03 04:32:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:32:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-03 04:32:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:39,778 INFO L225 Difference]: With dead ends: 20506 [2021-11-03 04:32:39,778 INFO L226 Difference]: Without dead ends: 13498 [2021-11-03 04:32:39,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13498 states. [2021-11-03 04:32:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13498 to 8573. [2021-11-03 04:32:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8573 states, 8568 states have (on average 1.8452380952380953) internal successors, (15810), 8572 states have internal predecessors, (15810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8573 states to 8573 states and 15810 transitions. [2021-11-03 04:32:40,272 INFO L78 Accepts]: Start accepts. Automaton has 8573 states and 15810 transitions. Word has length 80 [2021-11-03 04:32:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:40,273 INFO L470 AbstractCegarLoop]: Abstraction has 8573 states and 15810 transitions. [2021-11-03 04:32:40,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8573 states and 15810 transitions. [2021-11-03 04:32:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 04:32:40,275 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:40,275 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] [2021-11-03 04:32:40,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:40,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:40,492 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)] === [2021-11-03 04:32:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:40,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2035640683, now seen corresponding path program 1 times [2021-11-03 04:32:40,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:40,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612785320] [2021-11-03 04:32:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:40,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:40,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:40,494 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:40,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:32:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:32:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:41,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:41,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:41,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612785320] [2021-11-03 04:32:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612785320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:41,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:41,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:32:41,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735998323] [2021-11-03 04:32:41,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:32:41,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:32:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:32:41,651 INFO L87 Difference]: Start difference. First operand 8573 states and 15810 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:44,744 INFO L93 Difference]: Finished difference Result 57863 states and 107219 transitions. [2021-11-03 04:32:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:32:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-03 04:32:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:44,809 INFO L225 Difference]: With dead ends: 57863 [2021-11-03 04:32:44,810 INFO L226 Difference]: Without dead ends: 49347 [2021-11-03 04:32:44,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:32:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49347 states. [2021-11-03 04:32:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49347 to 13359. [2021-11-03 04:32:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13359 states, 13354 states have (on average 1.8475363187060057) internal successors, (24672), 13358 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13359 states to 13359 states and 24672 transitions. [2021-11-03 04:32:46,009 INFO L78 Accepts]: Start accepts. Automaton has 13359 states and 24672 transitions. Word has length 81 [2021-11-03 04:32:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:46,009 INFO L470 AbstractCegarLoop]: Abstraction has 13359 states and 24672 transitions. [2021-11-03 04:32:46,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 13359 states and 24672 transitions. [2021-11-03 04:32:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 04:32:46,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:46,012 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] [2021-11-03 04:32:46,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:46,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:46,225 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)] === [2021-11-03 04:32:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2019114092, now seen corresponding path program 1 times [2021-11-03 04:32:46,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:46,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711736452] [2021-11-03 04:32:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:46,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:46,227 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:46,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:32:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:47,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:32:47,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:47,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:47,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:47,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711736452] [2021-11-03 04:32:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711736452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:47,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:32:47,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515143097] [2021-11-03 04:32:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:47,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:47,470 INFO L87 Difference]: Start difference. First operand 13359 states and 24672 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:49,044 INFO L93 Difference]: Finished difference Result 34351 states and 63517 transitions. [2021-11-03 04:32:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-11-03 04:32:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:49,074 INFO L225 Difference]: With dead ends: 34351 [2021-11-03 04:32:49,075 INFO L226 Difference]: Without dead ends: 22840 [2021-11-03 04:32:49,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22840 states. [2021-11-03 04:32:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22840 to 22825. [2021-11-03 04:32:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22825 states, 22820 states have (on average 1.8486853637160385) internal successors, (42187), 22824 states have internal predecessors, (42187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:50,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22825 states to 22825 states and 42187 transitions. [2021-11-03 04:32:50,397 INFO L78 Accepts]: Start accepts. Automaton has 22825 states and 42187 transitions. Word has length 82 [2021-11-03 04:32:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:50,397 INFO L470 AbstractCegarLoop]: Abstraction has 22825 states and 42187 transitions. [2021-11-03 04:32:50,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 22825 states and 42187 transitions. [2021-11-03 04:32:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:32:50,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:50,399 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] [2021-11-03 04:32:50,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:50,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:50,600 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)] === [2021-11-03 04:32:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 773716092, now seen corresponding path program 1 times [2021-11-03 04:32:50,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:50,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701158507] [2021-11-03 04:32:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:50,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:50,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:50,602 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:50,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:32:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:32:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:51,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:51,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:51,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701158507] [2021-11-03 04:32:51,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701158507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:51,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:51,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:32:51,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526034504] [2021-11-03 04:32:51,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:51,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:51,848 INFO L87 Difference]: Start difference. First operand 22825 states and 42187 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:54,606 INFO L93 Difference]: Finished difference Result 61491 states and 113710 transitions. [2021-11-03 04:32:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:32:54,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-03 04:32:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:54,654 INFO L225 Difference]: With dead ends: 61491 [2021-11-03 04:32:54,654 INFO L226 Difference]: Without dead ends: 41586 [2021-11-03 04:32:54,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41586 states. [2021-11-03 04:32:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41586 to 41571. [2021-11-03 04:32:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41571 states, 41566 states have (on average 1.8489390367126979) internal successors, (76853), 41570 states have internal predecessors, (76853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41571 states to 41571 states and 76853 transitions. [2021-11-03 04:32:57,189 INFO L78 Accepts]: Start accepts. Automaton has 41571 states and 76853 transitions. Word has length 83 [2021-11-03 04:32:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:57,189 INFO L470 AbstractCegarLoop]: Abstraction has 41571 states and 76853 transitions. [2021-11-03 04:32:57,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 41571 states and 76853 transitions. [2021-11-03 04:32:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:32:57,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:57,191 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] [2021-11-03 04:32:57,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:57,391 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)] === [2021-11-03 04:32:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1545028431, now seen corresponding path program 1 times [2021-11-03 04:32:57,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:57,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162235885] [2021-11-03 04:32:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:57,392 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:57,393 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:57,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:32:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:58,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:32:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:58,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:58,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:58,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162235885] [2021-11-03 04:32:58,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162235885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:58,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:58,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:32:58,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780843053] [2021-11-03 04:32:58,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:32:58,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:32:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:32:58,696 INFO L87 Difference]: Start difference. First operand 41571 states and 76853 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:04,122 INFO L93 Difference]: Finished difference Result 115399 states and 213319 transitions. [2021-11-03 04:33:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:33:04,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2021-11-03 04:33:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:04,229 INFO L225 Difference]: With dead ends: 115399 [2021-11-03 04:33:04,229 INFO L226 Difference]: Without dead ends: 78676 [2021-11-03 04:33:04,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:33:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78676 states. [2021-11-03 04:33:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78676 to 78661. [2021-11-03 04:33:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78661 states, 78656 states have (on average 1.8480344792514238) internal successors, (145359), 78660 states have internal predecessors, (145359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78661 states to 78661 states and 145359 transitions. [2021-11-03 04:33:09,565 INFO L78 Accepts]: Start accepts. Automaton has 78661 states and 145359 transitions. Word has length 84 [2021-11-03 04:33:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:09,565 INFO L470 AbstractCegarLoop]: Abstraction has 78661 states and 145359 transitions. [2021-11-03 04:33:09,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 78661 states and 145359 transitions. [2021-11-03 04:33:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:33:09,567 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:09,567 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] [2021-11-03 04:33:09,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:09,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:09,768 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:33:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:09,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1517190497, now seen corresponding path program 1 times [2021-11-03 04:33:09,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:09,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585075208] [2021-11-03 04:33:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:09,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:09,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:09,770 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:09,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:33:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:10,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:33:10,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:10,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:11,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:11,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585075208] [2021-11-03 04:33:11,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585075208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:11,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:11,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:33:11,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288934280] [2021-11-03 04:33:11,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:33:11,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:33:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:33:11,490 INFO L87 Difference]: Start difference. First operand 78661 states and 145359 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:21,251 INFO L93 Difference]: Finished difference Result 222411 states and 410788 transitions. [2021-11-03 04:33:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:33:21,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 04:33:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:21,493 INFO L225 Difference]: With dead ends: 222411 [2021-11-03 04:33:21,493 INFO L226 Difference]: Without dead ends: 152022 [2021-11-03 04:33:21,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:33:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152022 states. [2021-11-03 04:33:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152022 to 152007. [2021-11-03 04:33:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152007 states, 152002 states have (on average 1.8461664978092394) internal successors, (280621), 152006 states have internal predecessors, (280621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152007 states to 152007 states and 280621 transitions. [2021-11-03 04:33:32,227 INFO L78 Accepts]: Start accepts. Automaton has 152007 states and 280621 transitions. Word has length 85 [2021-11-03 04:33:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:32,227 INFO L470 AbstractCegarLoop]: Abstraction has 152007 states and 280621 transitions. [2021-11-03 04:33:32,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 152007 states and 280621 transitions. [2021-11-03 04:33:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:33:32,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:32,229 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] [2021-11-03 04:33:32,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:33:32,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:32,430 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:33:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash -288247837, now seen corresponding path program 1 times [2021-11-03 04:33:32,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:32,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896094642] [2021-11-03 04:33:32,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:32,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:32,433 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:32,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:33:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:33,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:33:33,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:33,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:33,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:33,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896094642] [2021-11-03 04:33:33,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896094642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:33,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:33,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:33:33,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624801854] [2021-11-03 04:33:33,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:33:33,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:33,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:33:33,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:33:33,900 INFO L87 Difference]: Start difference. First operand 152007 states and 280621 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:01,429 INFO L93 Difference]: Finished difference Result 592544 states and 1099165 transitions. [2021-11-03 04:34:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:34:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-03 04:34:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:02,686 INFO L225 Difference]: With dead ends: 592544 [2021-11-03 04:34:02,687 INFO L226 Difference]: Without dead ends: 490210 [2021-11-03 04:34:02,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:34:03,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490210 states. [2021-11-03 04:34:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490210 to 247258. [2021-11-03 04:34:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247258 states, 247253 states have (on average 1.8442930925003944) internal successors, (456007), 247257 states have internal predecessors, (456007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247258 states to 247258 states and 456007 transitions. [2021-11-03 04:34:22,637 INFO L78 Accepts]: Start accepts. Automaton has 247258 states and 456007 transitions. Word has length 85 [2021-11-03 04:34:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:22,638 INFO L470 AbstractCegarLoop]: Abstraction has 247258 states and 456007 transitions. [2021-11-03 04:34:22,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 247258 states and 456007 transitions. [2021-11-03 04:34:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 04:34:22,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:22,641 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, 1] [2021-11-03 04:34:22,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:22,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:22,843 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:34:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2003221129, now seen corresponding path program 1 times [2021-11-03 04:34:22,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:22,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302462569] [2021-11-03 04:34:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:22,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:22,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:22,846 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:22,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:34:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:34:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:24,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:24,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:24,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302462569] [2021-11-03 04:34:24,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302462569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:24,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:24,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:34:24,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455649497] [2021-11-03 04:34:24,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:34:24,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:24,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:34:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:34:24,389 INFO L87 Difference]: Start difference. First operand 247258 states and 456007 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:33,354 INFO L93 Difference]: Finished difference Result 1271130 states and 2358645 transitions. [2021-11-03 04:35:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:35:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 87 [2021-11-03 04:35:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:35,832 INFO L225 Difference]: With dead ends: 1271130 [2021-11-03 04:35:35,832 INFO L226 Difference]: Without dead ends: 1073545 [2021-11-03 04:35:36,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:35:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073545 states. [2021-11-03 04:36:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073545 to 379438. [2021-11-03 04:36:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379438 states, 379433 states have (on average 1.8476410855144387) internal successors, (701056), 379437 states have internal predecessors, (701056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379438 states to 379438 states and 701056 transitions. [2021-11-03 04:36:12,001 INFO L78 Accepts]: Start accepts. Automaton has 379438 states and 701056 transitions. Word has length 87 [2021-11-03 04:36:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:12,001 INFO L470 AbstractCegarLoop]: Abstraction has 379438 states and 701056 transitions. [2021-11-03 04:36:12,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 379438 states and 701056 transitions. [2021-11-03 04:36:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 04:36:12,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:12,004 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:12,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:12,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:36:12,205 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:36:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash -987799311, now seen corresponding path program 1 times [2021-11-03 04:36:12,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:12,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908912415] [2021-11-03 04:36:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:12,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:12,208 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:12,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:36:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:36:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:13,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:13,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:13,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908912415] [2021-11-03 04:36:13,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908912415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:13,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:13,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:36:13,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845103378] [2021-11-03 04:36:13,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:36:13,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:36:13,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:36:13,597 INFO L87 Difference]: Start difference. First operand 379438 states and 701056 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:21,627 INFO L93 Difference]: Finished difference Result 1296590 states and 2397078 transitions. [2021-11-03 04:37:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:37:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 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 94 [2021-11-03 04:37:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:24,240 INFO L225 Difference]: With dead ends: 1296590 [2021-11-03 04:37:24,240 INFO L226 Difference]: Without dead ends: 931438 [2021-11-03 04:37:24,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:37:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931438 states. [2021-11-03 04:37:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931438 to 374506. [2021-11-03 04:37:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374506 states, 374501 states have (on average 1.824766823052542) internal successors, (683377), 374505 states have internal predecessors, (683377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374506 states to 374506 states and 683377 transitions. [2021-11-03 04:37:59,588 INFO L78 Accepts]: Start accepts. Automaton has 374506 states and 683377 transitions. Word has length 94 [2021-11-03 04:37:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:59,589 INFO L470 AbstractCegarLoop]: Abstraction has 374506 states and 683377 transitions. [2021-11-03 04:37:59,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 374506 states and 683377 transitions. [2021-11-03 04:37:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-03 04:37:59,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:59,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:59,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:59,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:37:59,793 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:37:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1812292220, now seen corresponding path program 1 times [2021-11-03 04:37:59,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:59,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934914026] [2021-11-03 04:37:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:59,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:59,795 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:59,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:38:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:38:00,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:38:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:38:01,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:01,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934914026] [2021-11-03 04:38:01,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934914026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:01,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:38:01,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:38:01,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766148110] [2021-11-03 04:38:01,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:38:01,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:38:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:38:01,469 INFO L87 Difference]: Start difference. First operand 374506 states and 683377 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:09,470 INFO L93 Difference]: Finished difference Result 1128452 states and 2059511 transitions. [2021-11-03 04:39:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:39:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 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 95 [2021-11-03 04:39:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:11,296 INFO L225 Difference]: With dead ends: 1128452 [2021-11-03 04:39:11,297 INFO L226 Difference]: Without dead ends: 808929 [2021-11-03 04:39:11,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:39:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808929 states. [2021-11-03 04:39:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808929 to 325324. [2021-11-03 04:39:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325324 states, 325319 states have (on average 1.8138565531063355) internal successors, (590082), 325323 states have internal predecessors, (590082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325324 states to 325324 states and 590082 transitions. [2021-11-03 04:39:45,002 INFO L78 Accepts]: Start accepts. Automaton has 325324 states and 590082 transitions. Word has length 95 [2021-11-03 04:39:45,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:45,003 INFO L470 AbstractCegarLoop]: Abstraction has 325324 states and 590082 transitions. [2021-11-03 04:39:45,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 5 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 325324 states and 590082 transitions. [2021-11-03 04:39:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-03 04:39:45,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:45,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:45,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:45,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:45,207 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:39:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:45,207 INFO L85 PathProgramCache]: Analyzing trace with hash 801174970, now seen corresponding path program 1 times [2021-11-03 04:39:45,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:45,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998628990] [2021-11-03 04:39:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:45,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:45,209 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:45,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:39:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:46,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:39:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:46,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:46,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:46,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998628990] [2021-11-03 04:39:46,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998628990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:46,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:46,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:39:46,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224955881] [2021-11-03 04:39:46,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:39:46,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:46,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:39:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:39:46,961 INFO L87 Difference]: Start difference. First operand 325324 states and 590082 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:10,172 INFO L93 Difference]: Finished difference Result 2381698 states and 4306985 transitions. [2021-11-03 04:43:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 04:43:10,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 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 95 [2021-11-03 04:43:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:16,540 INFO L225 Difference]: With dead ends: 2381698 [2021-11-03 04:43:16,540 INFO L226 Difference]: Without dead ends: 2069390 [2021-11-03 04:43:18,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:43:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069390 states. [2021-11-03 04:45:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069390 to 756856. [2021-11-03 04:45:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756856 states, 756851 states have (on average 1.8174964424966076) internal successors, (1375574), 756855 states have internal predecessors, (1375574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756856 states to 756856 states and 1375574 transitions. [2021-11-03 04:45:14,793 INFO L78 Accepts]: Start accepts. Automaton has 756856 states and 1375574 transitions. Word has length 95 [2021-11-03 04:45:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:14,793 INFO L470 AbstractCegarLoop]: Abstraction has 756856 states and 1375574 transitions. [2021-11-03 04:45:14,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:45:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 756856 states and 1375574 transitions. [2021-11-03 04:45:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-03 04:45:14,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:14,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:45:14,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:14,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:14,998 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 04:45:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:14,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1315649244, now seen corresponding path program 1 times [2021-11-03 04:45:14,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:15,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989111827] [2021-11-03 04:45:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:15,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:15,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:15,002 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:15,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b389984-cfc4-4cdc-9e1f-f91164d901e8/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:45:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:45:16,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:16,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:45:16,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:16,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989111827] [2021-11-03 04:45:16,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989111827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:16,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:16,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:45:16,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588412685] [2021-11-03 04:45:17,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:45:17,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:45:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:45:17,001 INFO L87 Difference]: Start difference. First operand 756856 states and 1375574 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)