./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:32,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:32,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:32,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:32,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:32,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:32,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:32,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:32,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:32,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:32,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:32,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:32,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:32,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:32,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:32,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:32,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:32,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:32,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:32,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:32,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:32,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:32,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:32,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:32,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:32,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:32,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:32,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:32,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:32,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:32,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:32,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:32,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:32,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:32,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:32,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:32,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:32,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:32,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:32,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:32,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:32,598 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:26:32,652 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:32,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:32,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:32,660 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:32,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:32,660 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:32,660 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:26:32,661 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:32,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:32,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:26:32,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:26:32,669 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:32,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:26:32,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:26:32,670 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:26:32,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:32,672 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:32,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:26:32,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:32,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:32,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:26:32,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:32,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:26:32,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:32,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:32,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:26:32,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:32,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:26:32,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:32,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:32,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:32,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:32,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:32,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:26:32,678 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:26:32,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:26:32,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:26:32,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:32,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:32,679 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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2021-11-03 04:26:33,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:33,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:33,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:33,027 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:33,028 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:33,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-03 04:26:33,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/365eda0f0/ba90f0c2b2c44b5182de4daa4efd84af/FLAG54f06c9cf [2021-11-03 04:26:33,851 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:33,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-03 04:26:33,889 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/365eda0f0/ba90f0c2b2c44b5182de4daa4efd84af/FLAG54f06c9cf [2021-11-03 04:26:33,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/365eda0f0/ba90f0c2b2c44b5182de4daa4efd84af [2021-11-03 04:26:34,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:34,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:34,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:34,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:34,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:34,044 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:33" (1/1) ... [2021-11-03 04:26:34,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3513ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:34, skipping insertion in model container [2021-11-03 04:26:34,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:33" (1/1) ... [2021-11-03 04:26:34,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:34,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:35,077 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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-03 04:26:35,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:35,598 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 04:26:35,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11778908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:35, skipping insertion in model container [2021-11-03 04:26:35,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:35,600 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:26:35,617 INFO L168 Benchmark]: Toolchain (without parser) took 1599.88 ms. Allocated memory is still 83.9 MB. Free memory was 53.8 MB in the beginning and 42.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:35,618 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:26:35,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1569.17 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 43.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:26:35,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory is still 55.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1569.17 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 43.0 MB in the end (delta: 10.6 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: 750]: 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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:26:38,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:26:38,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:26:38,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:26:38,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:26:38,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:26:38,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:26:38,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:26:38,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:26:38,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:26:38,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:26:38,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:26:38,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:26:38,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:26:38,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:26:38,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:26:38,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:26:38,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:26:38,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:26:38,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:26:38,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:26:38,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:26:38,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:26:39,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:26:39,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:26:39,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:26:39,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:26:39,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:26:39,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:26:39,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:26:39,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:26:39,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:26:39,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:26:39,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:26:39,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:26:39,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:26:39,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:26:39,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:26:39,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:26:39,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:26:39,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:26:39,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:26:39,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:26:39,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:26:39,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:26:39,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:26:39,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:26:39,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:26:39,090 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:26:39,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:26:39,091 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:26:39,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:26:39,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:26:39,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:26:39,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:26:39,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:26:39,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:26:39,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:26:39,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:26:39,096 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:26:39,096 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:26:39,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:26:39,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:26:39,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:26:39,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:26:39,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:26:39,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:26:39,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:26:39,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:39,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:26:39,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:26:39,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:26:39,099 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:26:39,099 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:39,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:26:39,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:26:39,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:26:39,101 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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2021-11-03 04:26:39,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:26:39,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:26:39,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:26:39,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:26:39,552 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:26:39,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-03 04:26:39,624 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/8bed6d0d2/1e100e3e9cc54527bb5ba650a496c0cb/FLAG948d96b8e [2021-11-03 04:26:40,292 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:26:40,293 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-03 04:26:40,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/8bed6d0d2/1e100e3e9cc54527bb5ba650a496c0cb/FLAG948d96b8e [2021-11-03 04:26:40,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/data/8bed6d0d2/1e100e3e9cc54527bb5ba650a496c0cb [2021-11-03 04:26:40,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:26:40,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:26:40,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:40,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:26:40,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:26:40,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:40" (1/1) ... [2021-11-03 04:26:40,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be7d2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:40, skipping insertion in model container [2021-11-03 04:26:40,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:26:40" (1/1) ... [2021-11-03 04:26:40,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:26:40,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:40,978 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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-03 04:26:41,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:41,288 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:26:41,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:26:41,376 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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-03 04:26:41,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:41,512 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:26:41,578 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_14df63e0-9c34-40c1-85e8-9de568ac7eb2/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-03 04:26:41,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:26:41,695 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:26:41,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41 WrapperNode [2021-11-03 04:26:41,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:26:41,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:41,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:26:41,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:26:41,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:41,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:41,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:26:41,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:26:41,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:26:41,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:26:41,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:41,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:41,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:41,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:42,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:42,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:42,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:42,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:26:42,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:26:42,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:26:42,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:26:42,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (1/1) ... [2021-11-03 04:26:42,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:26:42,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:42,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:26:42,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:26:42,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:26:42,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:26:42,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:26:42,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:26:51,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:26:51,167 INFO L299 CfgBuilder]: Removed 541 assume(true) statements. [2021-11-03 04:26:51,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:51 BoogieIcfgContainer [2021-11-03 04:26:51,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:26:51,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:26:51,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:26:51,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:26:51,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:26:40" (1/3) ... [2021-11-03 04:26:51,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704c0d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:51, skipping insertion in model container [2021-11-03 04:26:51,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:26:41" (2/3) ... [2021-11-03 04:26:51,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704c0d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:26:51, skipping insertion in model container [2021-11-03 04:26:51,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:26:51" (3/3) ... [2021-11-03 04:26:51,182 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2021-11-03 04:26:51,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:26:51,188 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 04:26:51,275 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:26:51,281 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 04:26:51,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 04:26:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 2403 states, 2397 states have (on average 1.8940342094284521) internal successors, (4540), 2402 states have internal predecessors, (4540), 0 states have call successors, (0), 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 04:26:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-03 04:26:51,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:51,370 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] [2021-11-03 04:26:51,371 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 04:26:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1455721413, now seen corresponding path program 1 times [2021-11-03 04:26:51,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:51,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913861752] [2021-11-03 04:26:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:51,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:51,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:51,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:51,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:26:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:51,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:26:51,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:51,974 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 04:26:51,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:52,069 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 04:26:52,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:52,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913861752] [2021-11-03 04:26:52,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913861752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:52,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:52,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:26:52,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924460187] [2021-11-03 04:26:52,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:26:52,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:26:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:26:52,107 INFO L87 Difference]: Start difference. First operand has 2403 states, 2397 states have (on average 1.8940342094284521) internal successors, (4540), 2402 states have internal predecessors, (4540), 0 states have call successors, (0), 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 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 04:26:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:52,223 INFO L93 Difference]: Finished difference Result 2422 states and 4563 transitions. [2021-11-03 04:26:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:26:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-11-03 04:26:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:52,264 INFO L225 Difference]: With dead ends: 2422 [2021-11-03 04:26:52,265 INFO L226 Difference]: Without dead ends: 2399 [2021-11-03 04:26:52,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 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 04:26:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-11-03 04:26:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2021-11-03 04:26:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2394 states have (on average 1.8913951545530492) internal successors, (4528), 2398 states have internal predecessors, (4528), 0 states have call successors, (0), 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 04:26:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 4528 transitions. [2021-11-03 04:26:52,468 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 4528 transitions. Word has length 47 [2021-11-03 04:26:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:52,469 INFO L470 AbstractCegarLoop]: Abstraction has 2399 states and 4528 transitions. [2021-11-03 04:26:52,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 04:26:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 4528 transitions. [2021-11-03 04:26:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-03 04:26:52,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:52,481 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] [2021-11-03 04:26:52,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:52,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:52,699 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 04:26:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2064783089, now seen corresponding path program 1 times [2021-11-03 04:26:52,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:52,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442328671] [2021-11-03 04:26:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:52,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:52,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:52,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:26:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:53,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:26:53,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:53,403 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 04:26:53,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:53,543 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 04:26:53,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:53,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442328671] [2021-11-03 04:26:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442328671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:53,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:53,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:26:53,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277755281] [2021-11-03 04:26:53,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:53,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:53,553 INFO L87 Difference]: Start difference. First operand 2399 states and 4528 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:53,915 INFO L93 Difference]: Finished difference Result 7117 states and 13441 transitions. [2021-11-03 04:26:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:53,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-03 04:26:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:53,948 INFO L225 Difference]: With dead ends: 7117 [2021-11-03 04:26:53,948 INFO L226 Difference]: Without dead ends: 4731 [2021-11-03 04:26:53,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 04:26:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2021-11-03 04:26:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 2399. [2021-11-03 04:26:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2394 states have (on average 1.8884711779448622) internal successors, (4521), 2398 states have internal predecessors, (4521), 0 states have call successors, (0), 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 04:26:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 4521 transitions. [2021-11-03 04:26:54,069 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 4521 transitions. Word has length 49 [2021-11-03 04:26:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:54,070 INFO L470 AbstractCegarLoop]: Abstraction has 2399 states and 4521 transitions. [2021-11-03 04:26:54,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 4521 transitions. [2021-11-03 04:26:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-03 04:26:54,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:54,084 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:54,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:54,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:54,302 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 04:26:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1303247026, now seen corresponding path program 1 times [2021-11-03 04:26:54,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:54,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860857403] [2021-11-03 04:26:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:54,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:54,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:54,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:54,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:26:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:26:54,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:54,812 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 04:26:54,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:54,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:54,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860857403] [2021-11-03 04:26:54,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860857403] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:54,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:54,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:26:54,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517352595] [2021-11-03 04:26:54,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:26:54,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:26:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:26:54,990 INFO L87 Difference]: Start difference. First operand 2399 states and 4521 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:56,030 INFO L93 Difference]: Finished difference Result 16268 states and 30699 transitions. [2021-11-03 04:26:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:26:56,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-03 04:26:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:56,124 INFO L225 Difference]: With dead ends: 16268 [2021-11-03 04:26:56,125 INFO L226 Difference]: Without dead ends: 13891 [2021-11-03 04:26:56,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 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 04:26:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13891 states. [2021-11-03 04:26:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13891 to 2377. [2021-11-03 04:26:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2372 states have (on average 1.884485666104553) internal successors, (4470), 2376 states have internal predecessors, (4470), 0 states have call successors, (0), 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 04:26:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 4470 transitions. [2021-11-03 04:26:56,339 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 4470 transitions. Word has length 55 [2021-11-03 04:26:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:56,340 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 4470 transitions. [2021-11-03 04:26:56,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 4470 transitions. [2021-11-03 04:26:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:26:56,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:56,343 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:56,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:56,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:56,563 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 04:26:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 313981743, now seen corresponding path program 1 times [2021-11-03 04:26:56,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:56,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233056533] [2021-11-03 04:26:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:56,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:56,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:56,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:56,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:26:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:26:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:57,220 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 04:26:57,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:57,380 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 04:26:57,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:57,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233056533] [2021-11-03 04:26:57,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233056533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:57,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:57,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:26:57,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458771990] [2021-11-03 04:26:57,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:26:57,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:26:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:26:57,382 INFO L87 Difference]: Start difference. First operand 2377 states and 4470 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 04:26:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:57,784 INFO L93 Difference]: Finished difference Result 7028 states and 13245 transitions. [2021-11-03 04:26:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 04:26:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:57,815 INFO L225 Difference]: With dead ends: 7028 [2021-11-03 04:26:57,815 INFO L226 Difference]: Without dead ends: 4673 [2021-11-03 04:26:57,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 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 04:26:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2021-11-03 04:26:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 2377. [2021-11-03 04:26:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2372 states have (on average 1.879848229342327) internal successors, (4459), 2376 states have internal predecessors, (4459), 0 states have call successors, (0), 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 04:26:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 4459 transitions. [2021-11-03 04:26:57,968 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 4459 transitions. Word has length 57 [2021-11-03 04:26:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:57,970 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 4459 transitions. [2021-11-03 04:26:57,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 04:26:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 4459 transitions. [2021-11-03 04:26:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 04:26:57,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:57,975 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] [2021-11-03 04:26:57,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:26:58,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:58,189 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 04:26:58,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:58,189 INFO L85 PathProgramCache]: Analyzing trace with hash 857999172, now seen corresponding path program 1 times [2021-11-03 04:26:58,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:58,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896544356] [2021-11-03 04:26:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:58,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:58,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:58,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:26:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:26:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:58,846 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 04:26:58,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:59,048 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 04:26:59,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:59,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896544356] [2021-11-03 04:26:59,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896544356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:59,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:59,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:26:59,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241490171] [2021-11-03 04:26:59,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:26:59,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:26:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:26:59,051 INFO L87 Difference]: Start difference. First operand 2377 states and 4459 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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 04:27:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:01,234 INFO L93 Difference]: Finished difference Result 25391 states and 47883 transitions. [2021-11-03 04:27:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:27:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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 63 [2021-11-03 04:27:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:01,307 INFO L225 Difference]: With dead ends: 25391 [2021-11-03 04:27:01,307 INFO L226 Difference]: Without dead ends: 23039 [2021-11-03 04:27:01,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 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 04:27:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23039 states. [2021-11-03 04:27:01,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23039 to 2379. [2021-11-03 04:27:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2374 states have (on average 1.877000842459983) internal successors, (4456), 2378 states have internal predecessors, (4456), 0 states have call successors, (0), 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 04:27:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 4456 transitions. [2021-11-03 04:27:01,695 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 4456 transitions. Word has length 63 [2021-11-03 04:27:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:01,696 INFO L470 AbstractCegarLoop]: Abstraction has 2379 states and 4456 transitions. [2021-11-03 04:27:01,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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 04:27:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 4456 transitions. [2021-11-03 04:27:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 04:27:01,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:01,699 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:01,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:01,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:01,919 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 04:27:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash 252550871, now seen corresponding path program 1 times [2021-11-03 04:27:01,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:01,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117276405] [2021-11-03 04:27:01,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:01,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:01,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:01,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:01,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:27:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:02,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:27:02,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:02,904 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 04:27:02,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:03,096 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 04:27:03,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:03,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117276405] [2021-11-03 04:27:03,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117276405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:03,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:03,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:27:03,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497064096] [2021-11-03 04:27:03,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:27:03,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:27:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:03,099 INFO L87 Difference]: Start difference. First operand 2379 states and 4456 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 04:27:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:05,026 INFO L93 Difference]: Finished difference Result 25359 states and 47804 transitions. [2021-11-03 04:27:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:27:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-03 04:27:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:05,094 INFO L225 Difference]: With dead ends: 25359 [2021-11-03 04:27:05,094 INFO L226 Difference]: Without dead ends: 23007 [2021-11-03 04:27:05,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 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 04:27:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23007 states. [2021-11-03 04:27:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23007 to 2383. [2021-11-03 04:27:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2378 states have (on average 1.8751051303616484) internal successors, (4459), 2382 states have internal predecessors, (4459), 0 states have call successors, (0), 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 04:27:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 4459 transitions. [2021-11-03 04:27:05,386 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 4459 transitions. Word has length 65 [2021-11-03 04:27:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:05,387 INFO L470 AbstractCegarLoop]: Abstraction has 2383 states and 4459 transitions. [2021-11-03 04:27:05,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 04:27:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 4459 transitions. [2021-11-03 04:27:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:27:05,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:05,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:05,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:05,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:05,602 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 04:27:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1097849796, now seen corresponding path program 1 times [2021-11-03 04:27:05,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:05,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086616344] [2021-11-03 04:27:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:05,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:05,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:05,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:05,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:27:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:06,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:06,468 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 04:27:06,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:06,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:06,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086616344] [2021-11-03 04:27:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086616344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:06,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:06,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:06,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303554740] [2021-11-03 04:27:06,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:06,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:06,608 INFO L87 Difference]: Start difference. First operand 2383 states and 4459 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:06,849 INFO L93 Difference]: Finished difference Result 4714 states and 8849 transitions. [2021-11-03 04:27:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 04:27:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:06,864 INFO L225 Difference]: With dead ends: 4714 [2021-11-03 04:27:06,864 INFO L226 Difference]: Without dead ends: 2362 [2021-11-03 04:27:06,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 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 04:27:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-11-03 04:27:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2021-11-03 04:27:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2357 states have (on average 1.875689435723377) internal successors, (4421), 2361 states have internal predecessors, (4421), 0 states have call successors, (0), 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 04:27:07,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 4421 transitions. [2021-11-03 04:27:07,005 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 4421 transitions. Word has length 67 [2021-11-03 04:27:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:07,005 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 4421 transitions. [2021-11-03 04:27:07,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 4421 transitions. [2021-11-03 04:27:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:27:07,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:07,009 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 04:27:07,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:07,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:07,231 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 04:27:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2144876060, now seen corresponding path program 1 times [2021-11-03 04:27:07,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:07,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762993633] [2021-11-03 04:27:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:07,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:07,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:07,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:27:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:27:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:07,832 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 04:27:07,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:07,977 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 04:27:07,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:07,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762993633] [2021-11-03 04:27:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762993633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:07,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:07,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:27:07,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576814730] [2021-11-03 04:27:07,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:07,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:07,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:07,980 INFO L87 Difference]: Start difference. First operand 2362 states and 4421 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:08,141 INFO L93 Difference]: Finished difference Result 4658 states and 8752 transitions. [2021-11-03 04:27:08,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:08,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:27:08,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:08,147 INFO L225 Difference]: With dead ends: 4658 [2021-11-03 04:27:08,147 INFO L226 Difference]: Without dead ends: 2337 [2021-11-03 04:27:08,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 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 04:27:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-11-03 04:27:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2337. [2021-11-03 04:27:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2332 states have (on average 1.8769296740994854) internal successors, (4377), 2336 states have internal predecessors, (4377), 0 states have call successors, (0), 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 04:27:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 4377 transitions. [2021-11-03 04:27:08,279 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 4377 transitions. Word has length 68 [2021-11-03 04:27:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:08,279 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 4377 transitions. [2021-11-03 04:27:08,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 4377 transitions. [2021-11-03 04:27:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:27:08,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:08,282 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] [2021-11-03 04:27:08,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 04:27:08,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:08,498 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 04:27:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1822326989, now seen corresponding path program 1 times [2021-11-03 04:27:08,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:08,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141561439] [2021-11-03 04:27:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:08,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:08,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:08,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:27:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:08,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:08,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:09,160 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 04:27:09,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:09,331 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 04:27:09,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:09,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141561439] [2021-11-03 04:27:09,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141561439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:09,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:09,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:09,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934115104] [2021-11-03 04:27:09,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:09,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:09,354 INFO L87 Difference]: Start difference. First operand 2337 states and 4377 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 04:27:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:09,609 INFO L93 Difference]: Finished difference Result 4633 states and 8708 transitions. [2021-11-03 04:27:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:09,609 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 69 [2021-11-03 04:27:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:09,614 INFO L225 Difference]: With dead ends: 4633 [2021-11-03 04:27:09,614 INFO L226 Difference]: Without dead ends: 2334 [2021-11-03 04:27:09,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 04:27:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-11-03 04:27:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2334. [2021-11-03 04:27:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2329 states have (on average 1.8759124087591241) internal successors, (4369), 2333 states have internal predecessors, (4369), 0 states have call successors, (0), 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 04:27:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 4369 transitions. [2021-11-03 04:27:09,743 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 4369 transitions. Word has length 69 [2021-11-03 04:27:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:09,743 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 4369 transitions. [2021-11-03 04:27:09,743 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 04:27:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 4369 transitions. [2021-11-03 04:27:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:27:09,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:09,750 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 04:27:09,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:09,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:09,965 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 04:27:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1896232798, now seen corresponding path program 1 times [2021-11-03 04:27:09,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:09,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821944108] [2021-11-03 04:27:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:09,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:09,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:09,969 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:10,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:27:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 04:27:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:10,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:11,102 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 04:27:11,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:11,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821944108] [2021-11-03 04:27:11,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821944108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:11,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:11,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:27:11,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360132911] [2021-11-03 04:27:11,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:27:11,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:27:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:11,104 INFO L87 Difference]: Start difference. First operand 2334 states and 4369 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 04:27:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:11,334 INFO L93 Difference]: Finished difference Result 4624 states and 8690 transitions. [2021-11-03 04:27:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:11,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 70 [2021-11-03 04:27:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:11,340 INFO L225 Difference]: With dead ends: 4624 [2021-11-03 04:27:11,340 INFO L226 Difference]: Without dead ends: 2332 [2021-11-03 04:27:11,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 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 04:27:11,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-11-03 04:27:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2332. [2021-11-03 04:27:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2327 states have (on average 1.8749462827675119) internal successors, (4363), 2331 states have internal predecessors, (4363), 0 states have call successors, (0), 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 04:27:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 4363 transitions. [2021-11-03 04:27:11,474 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 4363 transitions. Word has length 70 [2021-11-03 04:27:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:11,475 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 4363 transitions. [2021-11-03 04:27:11,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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 04:27:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 4363 transitions. [2021-11-03 04:27:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:27:11,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:11,478 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:27:11,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:11,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:11,693 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 04:27:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -700534802, now seen corresponding path program 1 times [2021-11-03 04:27:11,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:11,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490162978] [2021-11-03 04:27:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:11,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:11,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:11,696 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:11,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:27:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:12,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:27:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:12,486 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 04:27:12,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:12,646 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 04:27:12,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:12,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490162978] [2021-11-03 04:27:12,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490162978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:12,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:12,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:27:12,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459865209] [2021-11-03 04:27:12,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:27:12,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:27:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:27:12,648 INFO L87 Difference]: Start difference. First operand 2332 states and 4363 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 04:27:12,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:12,855 INFO L93 Difference]: Finished difference Result 4617 states and 8675 transitions. [2021-11-03 04:27:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:12,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 71 [2021-11-03 04:27:12,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:12,858 INFO L225 Difference]: With dead ends: 4617 [2021-11-03 04:27:12,859 INFO L226 Difference]: Without dead ends: 2330 [2021-11-03 04:27:12,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 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 04:27:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-11-03 04:27:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2330. [2021-11-03 04:27:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2325 states have (on average 1.873978494623656) internal successors, (4357), 2329 states have internal predecessors, (4357), 0 states have call successors, (0), 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 04:27:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 4357 transitions. [2021-11-03 04:27:12,964 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 4357 transitions. Word has length 71 [2021-11-03 04:27:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:12,965 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 4357 transitions. [2021-11-03 04:27:12,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 04:27:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 4357 transitions. [2021-11-03 04:27:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:27:12,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:12,968 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 04:27:12,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 04:27:13,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:13,188 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 04:27:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -583370291, now seen corresponding path program 1 times [2021-11-03 04:27:13,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:13,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328025857] [2021-11-03 04:27:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:13,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:13,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:13,195 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:13,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:27:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:13,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:14,040 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 04:27:14,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:14,252 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 04:27:14,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:14,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328025857] [2021-11-03 04:27:14,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328025857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:14,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:14,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:27:14,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461629235] [2021-11-03 04:27:14,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:14,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:14,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:14,254 INFO L87 Difference]: Start difference. First operand 2330 states and 4357 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:16,080 INFO L93 Difference]: Finished difference Result 9316 states and 17465 transitions. [2021-11-03 04:27:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:27:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:27:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:16,091 INFO L225 Difference]: With dead ends: 9316 [2021-11-03 04:27:16,091 INFO L226 Difference]: Without dead ends: 7046 [2021-11-03 04:27:16,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 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 04:27:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-11-03 04:27:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 2334. [2021-11-03 04:27:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2329 states have (on average 1.8724774581365393) internal successors, (4361), 2333 states have internal predecessors, (4361), 0 states have call successors, (0), 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 04:27:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 4361 transitions. [2021-11-03 04:27:16,329 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 4361 transitions. Word has length 72 [2021-11-03 04:27:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:16,329 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 4361 transitions. [2021-11-03 04:27:16,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 4361 transitions. [2021-11-03 04:27:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:27:16,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:16,333 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 04:27:16,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:16,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:16,551 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 04:27:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1999793285, now seen corresponding path program 1 times [2021-11-03 04:27:16,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:16,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325322073] [2021-11-03 04:27:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:16,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:16,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:16,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:16,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:27:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:17,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:27:17,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:17,456 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 04:27:17,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:17,614 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 04:27:17,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:17,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325322073] [2021-11-03 04:27:17,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325322073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:17,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:17,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:17,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989072524] [2021-11-03 04:27:17,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:17,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:17,617 INFO L87 Difference]: Start difference. First operand 2334 states and 4361 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 04:27:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:24,269 INFO L93 Difference]: Finished difference Result 6329 states and 11808 transitions. [2021-11-03 04:27:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:27:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 73 [2021-11-03 04:27:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:24,276 INFO L225 Difference]: With dead ends: 6329 [2021-11-03 04:27:24,277 INFO L226 Difference]: Without dead ends: 4983 [2021-11-03 04:27:24,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 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 04:27:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-11-03 04:27:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 4292. [2021-11-03 04:27:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4287 states have (on average 1.8784697923956146) internal successors, (8053), 4291 states have internal predecessors, (8053), 0 states have call successors, (0), 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 04:27:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 8053 transitions. [2021-11-03 04:27:24,547 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 8053 transitions. Word has length 73 [2021-11-03 04:27:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:24,548 INFO L470 AbstractCegarLoop]: Abstraction has 4292 states and 8053 transitions. [2021-11-03 04:27:24,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 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 04:27:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 8053 transitions. [2021-11-03 04:27:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 04:27:24,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:24,553 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 04:27:24,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:24,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:24,768 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 04:27:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash 8048039, now seen corresponding path program 1 times [2021-11-03 04:27:24,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:24,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963376890] [2021-11-03 04:27:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:24,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:24,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:24,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:24,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:27:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:27:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:25,842 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 04:27:25,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:25,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963376890] [2021-11-03 04:27:25,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963376890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:25,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:25,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:27:25,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937184397] [2021-11-03 04:27:25,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:25,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:25,844 INFO L87 Difference]: Start difference. First operand 4292 states and 8053 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 04:27:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:27,314 INFO L93 Difference]: Finished difference Result 8056 states and 15026 transitions. [2021-11-03 04:27:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 04:27:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:27,320 INFO L225 Difference]: With dead ends: 8056 [2021-11-03 04:27:27,320 INFO L226 Difference]: Without dead ends: 4744 [2021-11-03 04:27:27,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 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 04:27:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-11-03 04:27:27,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4195. [2021-11-03 04:27:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4190 states have (on average 1.8613365155131265) internal successors, (7799), 4194 states have internal predecessors, (7799), 0 states have call successors, (0), 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 04:27:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 7799 transitions. [2021-11-03 04:27:27,617 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 7799 transitions. Word has length 74 [2021-11-03 04:27:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:27,618 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 7799 transitions. [2021-11-03 04:27:27,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 04:27:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 7799 transitions. [2021-11-03 04:27:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:27:27,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:27,620 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 04:27:27,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:27,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:27,837 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 04:27:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash 858880739, now seen corresponding path program 1 times [2021-11-03 04:27:27,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:27,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595960674] [2021-11-03 04:27:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:27,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:27,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:27,839 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:27,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:27:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:27:28,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:28,727 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 04:27:28,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:28,933 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 04:27:28,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:28,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595960674] [2021-11-03 04:27:28,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595960674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:28,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:28,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:27:28,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714654443] [2021-11-03 04:27:28,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:27:28,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:27:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:27:28,936 INFO L87 Difference]: Start difference. First operand 4195 states and 7799 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:30,891 INFO L93 Difference]: Finished difference Result 29826 states and 55770 transitions. [2021-11-03 04:27:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:27:30,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:27:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:30,936 INFO L225 Difference]: With dead ends: 29826 [2021-11-03 04:27:30,936 INFO L226 Difference]: Without dead ends: 25687 [2021-11-03 04:27:30,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:27:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25687 states. [2021-11-03 04:27:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25687 to 7848. [2021-11-03 04:27:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7843 states have (on average 1.8675251816906795) internal successors, (14647), 7847 states have internal predecessors, (14647), 0 states have call successors, (0), 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 04:27:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 14647 transitions. [2021-11-03 04:27:32,230 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 14647 transitions. Word has length 75 [2021-11-03 04:27:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:32,231 INFO L470 AbstractCegarLoop]: Abstraction has 7848 states and 14647 transitions. [2021-11-03 04:27:32,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 14647 transitions. [2021-11-03 04:27:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:27:32,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:32,235 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:27:32,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:32,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:32,449 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 04:27:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:32,450 INFO L85 PathProgramCache]: Analyzing trace with hash 724867233, now seen corresponding path program 1 times [2021-11-03 04:27:32,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:32,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805226301] [2021-11-03 04:27:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:32,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:32,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:32,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:27:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:27:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:34,025 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 04:27:34,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:34,254 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 04:27:34,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:34,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805226301] [2021-11-03 04:27:34,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805226301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:34,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:34,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:27:34,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330559796] [2021-11-03 04:27:34,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:34,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:34,256 INFO L87 Difference]: Start difference. First operand 7848 states and 14647 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 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 04:27:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:35,327 INFO L93 Difference]: Finished difference Result 23713 states and 44333 transitions. [2021-11-03 04:27:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:27:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:27:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:35,351 INFO L225 Difference]: With dead ends: 23713 [2021-11-03 04:27:35,351 INFO L226 Difference]: Without dead ends: 19229 [2021-11-03 04:27:35,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 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 04:27:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19229 states. [2021-11-03 04:27:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19229 to 12063. [2021-11-03 04:27:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12063 states, 12058 states have (on average 1.8688837286448832) internal successors, (22535), 12062 states have internal predecessors, (22535), 0 states have call successors, (0), 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 04:27:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12063 states to 12063 states and 22535 transitions. [2021-11-03 04:27:36,124 INFO L78 Accepts]: Start accepts. Automaton has 12063 states and 22535 transitions. Word has length 75 [2021-11-03 04:27:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:36,125 INFO L470 AbstractCegarLoop]: Abstraction has 12063 states and 22535 transitions. [2021-11-03 04:27:36,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 3 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 04:27:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 12063 states and 22535 transitions. [2021-11-03 04:27:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:27:36,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:36,127 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 04:27:36,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:36,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:36,343 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 04:27:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:36,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1193328725, now seen corresponding path program 1 times [2021-11-03 04:27:36,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:36,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403229339] [2021-11-03 04:27:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:36,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:36,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:36,344 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:36,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:27:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:27:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:37,306 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 04:27:37,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:27:37,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:37,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403229339] [2021-11-03 04:27:37,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403229339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:37,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:37,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:37,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240020242] [2021-11-03 04:27:37,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:37,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:37,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:37,567 INFO L87 Difference]: Start difference. First operand 12063 states and 22535 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:41,655 INFO L93 Difference]: Finished difference Result 64979 states and 121769 transitions. [2021-11-03 04:27:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:27:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 04:27:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:41,758 INFO L225 Difference]: With dead ends: 64979 [2021-11-03 04:27:41,758 INFO L226 Difference]: Without dead ends: 56280 [2021-11-03 04:27:41,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:27:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56280 states. [2021-11-03 04:27:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56280 to 19271. [2021-11-03 04:27:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19271 states, 19266 states have (on average 1.8715872521540537) internal successors, (36058), 19270 states have internal predecessors, (36058), 0 states have call successors, (0), 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 04:27:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19271 states to 19271 states and 36058 transitions. [2021-11-03 04:27:44,037 INFO L78 Accepts]: Start accepts. Automaton has 19271 states and 36058 transitions. Word has length 77 [2021-11-03 04:27:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:44,038 INFO L470 AbstractCegarLoop]: Abstraction has 19271 states and 36058 transitions. [2021-11-03 04:27:44,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:27:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19271 states and 36058 transitions. [2021-11-03 04:27:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:27:44,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:44,041 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 04:27:44,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 04:27:44,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:44,256 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 04:27:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 6774144, now seen corresponding path program 1 times [2021-11-03 04:27:44,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:44,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835297719] [2021-11-03 04:27:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:44,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:44,259 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:44,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:27:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:45,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:45,287 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 04:27:45,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:45,440 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 04:27:45,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:45,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835297719] [2021-11-03 04:27:45,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835297719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:45,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:45,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:45,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957732649] [2021-11-03 04:27:45,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:45,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:45,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:45,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:45,442 INFO L87 Difference]: Start difference. First operand 19271 states and 36058 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 04:27:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:47,823 INFO L93 Difference]: Finished difference Result 46569 states and 86797 transitions. [2021-11-03 04:27:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:27:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 84 [2021-11-03 04:27:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:47,856 INFO L225 Difference]: With dead ends: 46569 [2021-11-03 04:27:47,856 INFO L226 Difference]: Without dead ends: 28780 [2021-11-03 04:27:47,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 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 04:27:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28780 states. [2021-11-03 04:27:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28780 to 19148. [2021-11-03 04:27:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19148 states, 19143 states have (on average 1.8601577600167163) internal successors, (35609), 19147 states have internal predecessors, (35609), 0 states have call successors, (0), 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 04:27:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19148 states to 19148 states and 35609 transitions. [2021-11-03 04:27:49,301 INFO L78 Accepts]: Start accepts. Automaton has 19148 states and 35609 transitions. Word has length 84 [2021-11-03 04:27:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:49,301 INFO L470 AbstractCegarLoop]: Abstraction has 19148 states and 35609 transitions. [2021-11-03 04:27:49,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 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 04:27:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 19148 states and 35609 transitions. [2021-11-03 04:27:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:27:49,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:49,311 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 04:27:49,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:49,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:49,521 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 04:27:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash 84485187, now seen corresponding path program 1 times [2021-11-03 04:27:49,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:49,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472109692] [2021-11-03 04:27:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:49,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:49,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:49,526 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:49,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:27:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:27:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:50,853 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 04:27:50,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:51,049 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 04:27:51,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:51,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472109692] [2021-11-03 04:27:51,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472109692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:51,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:51,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:27:51,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518083320] [2021-11-03 04:27:51,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:27:51,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:27:51,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:27:51,051 INFO L87 Difference]: Start difference. First operand 19148 states and 35609 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 04:27:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:53,007 INFO L93 Difference]: Finished difference Result 35076 states and 65189 transitions. [2021-11-03 04:27:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:27:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 04:27:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:53,039 INFO L225 Difference]: With dead ends: 35076 [2021-11-03 04:27:53,054 INFO L226 Difference]: Without dead ends: 19163 [2021-11-03 04:27:53,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 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 04:27:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19163 states. [2021-11-03 04:27:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19163 to 19148. [2021-11-03 04:27:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19148 states, 19143 states have (on average 1.8527399049260826) internal successors, (35467), 19147 states have internal predecessors, (35467), 0 states have call successors, (0), 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 04:27:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19148 states to 19148 states and 35467 transitions. [2021-11-03 04:27:55,315 INFO L78 Accepts]: Start accepts. Automaton has 19148 states and 35467 transitions. Word has length 84 [2021-11-03 04:27:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:55,318 INFO L470 AbstractCegarLoop]: Abstraction has 19148 states and 35467 transitions. [2021-11-03 04:27:55,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 04:27:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 19148 states and 35467 transitions. [2021-11-03 04:27:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:27:55,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:55,337 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 04:27:55,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:55,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:27:55,553 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 04:27:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2078815622, now seen corresponding path program 1 times [2021-11-03 04:27:55,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:55,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360892558] [2021-11-03 04:27:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:27:55,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:55,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:55,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:55,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:27:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:27:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:27:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:57,063 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 04:27:57,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:57,488 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 04:27:57,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:57,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360892558] [2021-11-03 04:27:57,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360892558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:27:57,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:27:57,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:27:57,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242458037] [2021-11-03 04:27:57,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:27:57,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:27:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:27:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:27:57,490 INFO L87 Difference]: Start difference. First operand 19148 states and 35467 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 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 04:28:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:01,457 INFO L93 Difference]: Finished difference Result 55045 states and 101911 transitions. [2021-11-03 04:28:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:28:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 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 04:28:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:01,502 INFO L225 Difference]: With dead ends: 55045 [2021-11-03 04:28:01,502 INFO L226 Difference]: Without dead ends: 39433 [2021-11-03 04:28:01,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:28:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39433 states. [2021-11-03 04:28:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39433 to 15896. [2021-11-03 04:28:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15896 states, 15891 states have (on average 1.8440626769869737) internal successors, (29304), 15895 states have internal predecessors, (29304), 0 states have call successors, (0), 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 04:28:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15896 states to 15896 states and 29304 transitions. [2021-11-03 04:28:02,671 INFO L78 Accepts]: Start accepts. Automaton has 15896 states and 29304 transitions. Word has length 85 [2021-11-03 04:28:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:02,671 INFO L470 AbstractCegarLoop]: Abstraction has 15896 states and 29304 transitions. [2021-11-03 04:28:02,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 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 04:28:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 15896 states and 29304 transitions. [2021-11-03 04:28:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:28:02,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:02,673 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 04:28:02,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:02,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:02,874 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 04:28:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1067698372, now seen corresponding path program 1 times [2021-11-03 04:28:02,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:02,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287997719] [2021-11-03 04:28:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:02,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:02,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:02,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:02,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:28:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:03,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:28:03,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:04,049 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 04:28:04,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:04,389 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 04:28:04,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:04,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287997719] [2021-11-03 04:28:04,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287997719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:04,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:04,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:28:04,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394659097] [2021-11-03 04:28:04,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:28:04,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:04,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:28:04,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:28:04,391 INFO L87 Difference]: Start difference. First operand 15896 states and 29304 transitions. Second operand has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 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 04:28:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:15,576 INFO L93 Difference]: Finished difference Result 106663 states and 196282 transitions. [2021-11-03 04:28:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 04:28:15,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 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 04:28:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:15,710 INFO L225 Difference]: With dead ends: 106663 [2021-11-03 04:28:15,710 INFO L226 Difference]: Without dead ends: 92305 [2021-11-03 04:28:15,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:28:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92305 states. [2021-11-03 04:28:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92305 to 38311. [2021-11-03 04:28:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38311 states, 38306 states have (on average 1.8491359056022556) internal successors, (70833), 38310 states have internal predecessors, (70833), 0 states have call successors, (0), 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 04:28:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38311 states to 38311 states and 70833 transitions. [2021-11-03 04:28:18,647 INFO L78 Accepts]: Start accepts. Automaton has 38311 states and 70833 transitions. Word has length 85 [2021-11-03 04:28:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:18,648 INFO L470 AbstractCegarLoop]: Abstraction has 38311 states and 70833 transitions. [2021-11-03 04:28:18,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.1) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 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 04:28:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 38311 states and 70833 transitions. [2021-11-03 04:28:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:28:18,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:18,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:18,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:18,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:18,850 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 04:28:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1640690436, now seen corresponding path program 1 times [2021-11-03 04:28:18,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:18,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674629511] [2021-11-03 04:28:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:18,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:18,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:18,852 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:18,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:28:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:19,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:28:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:28:19,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:20,147 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 04:28:20,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:20,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674629511] [2021-11-03 04:28:20,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674629511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:20,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:20,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:28:20,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606647789] [2021-11-03 04:28:20,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:28:20,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:20,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:28:20,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:28:20,148 INFO L87 Difference]: Start difference. First operand 38311 states and 70833 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 04:28:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:28:32,636 INFO L93 Difference]: Finished difference Result 191489 states and 351114 transitions. [2021-11-03 04:28:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:28:32,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 86 [2021-11-03 04:28:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:28:32,998 INFO L225 Difference]: With dead ends: 191489 [2021-11-03 04:28:32,998 INFO L226 Difference]: Without dead ends: 156736 [2021-11-03 04:28:33,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 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 04:28:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156736 states. [2021-11-03 04:28:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156736 to 43765. [2021-11-03 04:28:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43765 states, 43760 states have (on average 1.815310786106033) internal successors, (79438), 43764 states have internal predecessors, (79438), 0 states have call successors, (0), 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 04:28:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43765 states to 43765 states and 79438 transitions. [2021-11-03 04:28:37,433 INFO L78 Accepts]: Start accepts. Automaton has 43765 states and 79438 transitions. Word has length 86 [2021-11-03 04:28:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:28:37,434 INFO L470 AbstractCegarLoop]: Abstraction has 43765 states and 79438 transitions. [2021-11-03 04:28:37,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 04:28:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 43765 states and 79438 transitions. [2021-11-03 04:28:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:28:37,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:28:37,436 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:28:37,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:28:37,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:28:37,636 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 04:28:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:28:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1365930822, now seen corresponding path program 1 times [2021-11-03 04:28:37,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:28:37,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629807512] [2021-11-03 04:28:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:28:37,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:28:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:28:37,639 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:28:37,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14df63e0-9c34-40c1-85e8-9de568ac7eb2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:28:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:28:39,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:28:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:39,441 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 04:28:39,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:39,686 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 04:28:39,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:28:39,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629807512] [2021-11-03 04:28:39,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629807512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:28:39,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:28:39,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:28:39,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008811599] [2021-11-03 04:28:39,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:28:39,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:39,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:28:39,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:28:39,689 INFO L87 Difference]: Start difference. First operand 43765 states and 79438 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 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)