./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF --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 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:20:45,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:20:45,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:20:45,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:20:45,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:20:45,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:20:45,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:20:45,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:20:45,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:20:45,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:20:45,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:20:45,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:20:45,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:20:45,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:20:45,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:20:45,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:20:45,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:20:45,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:20:45,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:20:45,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:20:45,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:20:45,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:20:45,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:20:45,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:20:45,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:20:45,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:20:45,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:20:45,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:20:45,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:20:45,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:20:45,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:20:45,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:20:45,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:20:45,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:20:45,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:20:45,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:20:45,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:20:45,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:20:45,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:20:45,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:20:45,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:20:45,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:20:45,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:20:45,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:20:45,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:20:45,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:20:45,617 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:20:45,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:20:45,618 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:20:45,618 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:20:45,618 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:20:45,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:20:45,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:20:45,619 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:20:45,619 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:20:45,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:20:45,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:20:45,619 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:20:45,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:20:45,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:20:45,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:20:45,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:20:45,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:20:45,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:20:45,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:20:45,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:20:45,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:20:45,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:20:45,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:20:45,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:20:45,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:20:45,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:20:45,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:20:45,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:20:45,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:20:45,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:20:45,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:20:45,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:20:45,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:20:45,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:20:45,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:20:45,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:20:45,625 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_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 [2021-11-12 22:20:45,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:20:45,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:20:45,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:20:45,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:20:45,916 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:20:45,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2021-11-12 22:20:46,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/1d4671e58/0f0733137c7b4642af640245e372f870/FLAG38254b8c4 [2021-11-12 22:20:46,695 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:20:46,696 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2021-11-12 22:20:46,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/1d4671e58/0f0733137c7b4642af640245e372f870/FLAG38254b8c4 [2021-11-12 22:20:46,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/1d4671e58/0f0733137c7b4642af640245e372f870 [2021-11-12 22:20:46,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:20:46,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:20:46,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:20:46,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:20:46,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:20:46,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:20:46" (1/1) ... [2021-11-12 22:20:46,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46195500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:46, skipping insertion in model container [2021-11-12 22:20:46,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:20:46" (1/1) ... [2021-11-12 22:20:46,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:20:47,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:20:47,465 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_adf2d829-a5f7-4f8f-8c50-f835386551e0/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2021-11-12 22:20:47,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:20:47,543 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) [2021-11-12 22:20:47,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2acc1e18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:47, skipping insertion in model container [2021-11-12 22:20:47,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:20:47,544 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:20:47,546 INFO L158 Benchmark]: Toolchain (without parser) took 647.09ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 48.1MB in the beginning and 76.3MB in the end (delta: -28.3MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-12 22:20:47,554 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory is still 67.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:20:47,555 INFO L158 Benchmark]: CACSL2BoogieTranslator took 641.78ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 47.9MB in the beginning and 76.3MB in the end (delta: -28.4MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-12 22:20:47,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory is still 67.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 641.78ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 47.9MB in the beginning and 76.3MB in the end (delta: -28.4MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 452]: 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_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF --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 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:20:49,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:20:49,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:20:49,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:20:49,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:20:49,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:20:49,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:20:49,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:20:49,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:20:49,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:20:49,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:20:49,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:20:49,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:20:49,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:20:49,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:20:49,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:20:49,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:20:49,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:20:49,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:20:49,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:20:49,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:20:49,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:20:49,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:20:49,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:20:49,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:20:49,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:20:49,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:20:49,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:20:49,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:20:49,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:20:49,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:20:49,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:20:49,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:20:49,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:20:49,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:20:49,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:20:49,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:20:49,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:20:49,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:20:49,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:20:49,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:20:49,890 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:20:49,931 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:20:49,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:20:49,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:20:49,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:20:49,933 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:20:49,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:20:49,934 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:20:49,934 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:20:49,934 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:20:49,934 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:20:49,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:20:49,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:20:49,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:20:49,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:20:49,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:20:49,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:20:49,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:20:49,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:20:49,939 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:20:49,939 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:20:49,939 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:20:49,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:20:49,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:20:49,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:20:49,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:20:49,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:20:49,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:20:49,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:20:49,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:20:49,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:20:49,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:20:49,942 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:20:49,942 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:20:49,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:20:49,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:20:49,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:20:49,943 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_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 [2021-11-12 22:20:50,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:20:50,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:20:50,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:20:50,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:20:50,332 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:20:50,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2021-11-12 22:20:50,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/8f1dd02fc/a1800e9ce779442896d49b928db552a5/FLAG056331310 [2021-11-12 22:20:51,185 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:20:51,186 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2021-11-12 22:20:51,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/8f1dd02fc/a1800e9ce779442896d49b928db552a5/FLAG056331310 [2021-11-12 22:20:51,361 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/data/8f1dd02fc/a1800e9ce779442896d49b928db552a5 [2021-11-12 22:20:51,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:20:51,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:20:51,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:20:51,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:20:51,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:20:51,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:20:51" (1/1) ... [2021-11-12 22:20:51,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@458e4f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:51, skipping insertion in model container [2021-11-12 22:20:51,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:20:51" (1/1) ... [2021-11-12 22:20:51,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:20:51,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:20:52,105 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_adf2d829-a5f7-4f8f-8c50-f835386551e0/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2021-11-12 22:20:52,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:20:52,173 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:20:52,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:20:52,329 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_adf2d829-a5f7-4f8f-8c50-f835386551e0/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2021-11-12 22:20:52,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:20:52,373 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:20:52,476 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_adf2d829-a5f7-4f8f-8c50-f835386551e0/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2021-11-12 22:20:52,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:20:52,541 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:20:52,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52 WrapperNode [2021-11-12 22:20:52,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:20:52,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:20:52,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:20:52,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:20:52,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:20:52,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:20:52,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:20:52,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:20:52,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:20:52,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:20:52,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:20:52,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:20:52,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (1/1) ... [2021-11-12 22:20:52,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:20:52,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:20:52,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:20:52,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:20:52,902 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 22:20:52,902 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 22:20:52,902 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:20:52,902 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:20:52,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:20:52,903 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-12 22:20:52,903 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-12 22:20:52,903 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:20:52,903 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:20:52,903 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:20:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:20:52,904 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:20:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:20:52,904 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:20:52,904 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:20:52,904 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:20:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:20:52,905 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:20:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:20:52,905 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:20:52,905 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:20:52,905 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:20:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:20:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:20:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:20:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:20:52,906 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:20:52,906 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:20:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:20:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:20:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:20:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:20:52,907 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 22:20:52,907 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 22:20:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:20:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:20:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 22:20:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 22:20:52,908 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:20:52,908 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:20:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:20:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:20:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:20:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:20:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:20:52,909 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:20:52,909 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:20:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:20:52,910 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:20:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:20:52,910 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:20:52,910 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:20:52,910 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:20:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:20:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:20:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:20:52,911 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:20:52,911 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:20:56,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:20:56,736 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:20:56,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:20:56 BoogieIcfgContainer [2021-11-12 22:20:56,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:20:56,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:20:56,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:20:56,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:20:56,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:20:51" (1/3) ... [2021-11-12 22:20:56,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e61104e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:20:56, skipping insertion in model container [2021-11-12 22:20:56,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:20:52" (2/3) ... [2021-11-12 22:20:56,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e61104e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:20:56, skipping insertion in model container [2021-11-12 22:20:56,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:20:56" (3/3) ... [2021-11-12 22:20:56,747 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product19.cil.c [2021-11-12 22:20:56,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:20:56,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:20:56,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:20:56,817 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 [2021-11-12 22:20:56,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:20:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 589 states, 452 states have (on average 1.668141592920354) internal successors, (754), 470 states have internal predecessors, (754), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 22:20:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:20:56,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:56,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:56,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -698037258, now seen corresponding path program 1 times [2021-11-12 22:20:56,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:56,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173604647] [2021-11-12 22:20:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:56,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:56,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:56,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:56,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:20:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:57,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:20:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:20:57,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:20:58,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:58,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173604647] [2021-11-12 22:20:58,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173604647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:58,506 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:58,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:20:58,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694666942] [2021-11-12 22:20:58,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:58,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:20:58,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:20:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:20:58,546 INFO L87 Difference]: Start difference. First operand has 589 states, 452 states have (on average 1.668141592920354) internal successors, (754), 470 states have internal predecessors, (754), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:20:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:58,955 INFO L93 Difference]: Finished difference Result 1181 states and 1961 transitions. [2021-11-12 22:20:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:20:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2021-11-12 22:20:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:58,994 INFO L225 Difference]: With dead ends: 1181 [2021-11-12 22:20:58,994 INFO L226 Difference]: Without dead ends: 600 [2021-11-12 22:20:59,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:20:59,012 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 119 mSDsluCounter, 6561 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 7513 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.11ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 212.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:59,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 7513 Invalid, 126 Unknown, 0 Unchecked, 37.11ms Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 212.96ms Time] [2021-11-12 22:20:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-12 22:20:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2021-11-12 22:20:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 455 states have (on average 1.6593406593406594) internal successors, (755), 473 states have internal predecessors, (755), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 104 states have call predecessors, (108), 106 states have call successors, (108) [2021-11-12 22:20:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 972 transitions. [2021-11-12 22:20:59,189 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 972 transitions. Word has length 113 [2021-11-12 22:20:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:59,190 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 972 transitions. [2021-11-12 22:20:59,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:20:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 972 transitions. [2021-11-12 22:20:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:20:59,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:59,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:59,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:59,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:59,423 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 223175720, now seen corresponding path program 1 times [2021-11-12 22:20:59,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:59,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255287917] [2021-11-12 22:20:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:59,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:59,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:59,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:59,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:20:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:20:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:00,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:00,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:00,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255287917] [2021-11-12 22:21:00,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255287917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:00,688 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:00,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:21:00,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657088683] [2021-11-12 22:21:00,689 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:00,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:21:00,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:21:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:21:00,692 INFO L87 Difference]: Start difference. First operand 592 states and 972 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:01,021 INFO L93 Difference]: Finished difference Result 1189 states and 1962 transitions. [2021-11-12 22:21:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:21:01,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 114 [2021-11-12 22:21:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:01,030 INFO L225 Difference]: With dead ends: 1189 [2021-11-12 22:21:01,030 INFO L226 Difference]: Without dead ends: 613 [2021-11-12 22:21:01,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:01,036 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 104 mSDsluCounter, 7409 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 8361 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.01ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:01,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 8361 Invalid, 132 Unknown, 0 Unchecked, 21.01ms Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 208.36ms Time] [2021-11-12 22:21:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-12 22:21:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 605. [2021-11-12 22:21:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 465 states have (on average 1.6559139784946237) internal successors, (770), 485 states have internal predecessors, (770), 110 states have call successors, (110), 27 states have call predecessors, (110), 29 states have return successors, (111), 105 states have call predecessors, (111), 107 states have call successors, (111) [2021-11-12 22:21:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 991 transitions. [2021-11-12 22:21:01,090 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 991 transitions. Word has length 114 [2021-11-12 22:21:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:01,093 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 991 transitions. [2021-11-12 22:21:01,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 991 transitions. [2021-11-12 22:21:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 22:21:01,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:01,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:01,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:01,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:01,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:01,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1047936858, now seen corresponding path program 1 times [2021-11-12 22:21:01,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:01,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498076089] [2021-11-12 22:21:01,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:01,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:01,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:01,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:01,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:21:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:01,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:21:01,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:02,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:02,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:02,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498076089] [2021-11-12 22:21:02,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498076089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:02,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:02,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:21:02,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991222537] [2021-11-12 22:21:02,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:21:02,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:02,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:21:02,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:21:02,674 INFO L87 Difference]: Start difference. First operand 605 states and 991 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:02,922 INFO L93 Difference]: Finished difference Result 1215 states and 2001 transitions. [2021-11-12 22:21:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:21:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 115 [2021-11-12 22:21:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:02,929 INFO L225 Difference]: With dead ends: 1215 [2021-11-12 22:21:02,930 INFO L226 Difference]: Without dead ends: 626 [2021-11-12 22:21:02,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:02,935 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 185 mSDsluCounter, 4720 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 5672 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.73ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:02,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 5672 Invalid, 111 Unknown, 0 Unchecked, 14.73ms Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 157.96ms Time] [2021-11-12 22:21:02,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-12 22:21:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 618. [2021-11-12 22:21:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 475 states have (on average 1.6526315789473685) internal successors, (785), 497 states have internal predecessors, (785), 111 states have call successors, (111), 27 states have call predecessors, (111), 31 states have return successors, (114), 106 states have call predecessors, (114), 108 states have call successors, (114) [2021-11-12 22:21:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1010 transitions. [2021-11-12 22:21:02,971 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1010 transitions. Word has length 115 [2021-11-12 22:21:02,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:02,971 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1010 transitions. [2021-11-12 22:21:02,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1010 transitions. [2021-11-12 22:21:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:21:02,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:02,976 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:02,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:03,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:03,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1117309044, now seen corresponding path program 1 times [2021-11-12 22:21:03,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:03,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523622562] [2021-11-12 22:21:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:03,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:03,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:03,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:03,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:21:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:03,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:21:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:03,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:04,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:04,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523622562] [2021-11-12 22:21:04,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523622562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:04,409 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:04,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:21:04,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862674434] [2021-11-12 22:21:04,410 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:04,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:21:04,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:21:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:21:04,411 INFO L87 Difference]: Start difference. First operand 618 states and 1010 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:04,629 INFO L93 Difference]: Finished difference Result 1237 states and 2034 transitions. [2021-11-12 22:21:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:21:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 116 [2021-11-12 22:21:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:04,636 INFO L225 Difference]: With dead ends: 1237 [2021-11-12 22:21:04,637 INFO L226 Difference]: Without dead ends: 635 [2021-11-12 22:21:04,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:04,642 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 182 mSDsluCounter, 4731 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 5684 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.60ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:04,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 5684 Invalid, 108 Unknown, 0 Unchecked, 11.60ms Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 146.44ms Time] [2021-11-12 22:21:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-12 22:21:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 631. [2021-11-12 22:21:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 485 states have (on average 1.6494845360824741) internal successors, (800), 509 states have internal predecessors, (800), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (117), 107 states have call predecessors, (117), 109 states have call successors, (117) [2021-11-12 22:21:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1029 transitions. [2021-11-12 22:21:04,676 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1029 transitions. Word has length 116 [2021-11-12 22:21:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:04,677 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1029 transitions. [2021-11-12 22:21:04,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1029 transitions. [2021-11-12 22:21:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:21:04,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:04,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:04,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-12 22:21:04,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:04,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash -369648371, now seen corresponding path program 1 times [2021-11-12 22:21:04,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:04,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067923638] [2021-11-12 22:21:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:04,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:04,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:04,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:21:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:05,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:21:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:05,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:06,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:06,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067923638] [2021-11-12 22:21:06,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067923638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:06,132 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:06,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:21:06,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775578418] [2021-11-12 22:21:06,132 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:06,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:21:06,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:21:06,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:21:06,133 INFO L87 Difference]: Start difference. First operand 631 states and 1029 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:21:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:06,324 INFO L93 Difference]: Finished difference Result 1257 states and 2064 transitions. [2021-11-12 22:21:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:21:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 116 [2021-11-12 22:21:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:06,331 INFO L225 Difference]: With dead ends: 1257 [2021-11-12 22:21:06,332 INFO L226 Difference]: Without dead ends: 642 [2021-11-12 22:21:06,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:21:06,338 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 150 mSDsluCounter, 4568 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 5508 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.73ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:06,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 5508 Invalid, 81 Unknown, 0 Unchecked, 10.73ms Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 114.14ms Time] [2021-11-12 22:21:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-12 22:21:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 640. [2021-11-12 22:21:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 493 states have (on average 1.6490872210953347) internal successors, (813), 518 states have internal predecessors, (813), 112 states have call successors, (112), 27 states have call predecessors, (112), 34 states have return successors, (121), 107 states have call predecessors, (121), 109 states have call successors, (121) [2021-11-12 22:21:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1046 transitions. [2021-11-12 22:21:06,371 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1046 transitions. Word has length 116 [2021-11-12 22:21:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:06,372 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1046 transitions. [2021-11-12 22:21:06,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:21:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1046 transitions. [2021-11-12 22:21:06,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:21:06,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:06,377 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:06,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:06,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:06,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1483492674, now seen corresponding path program 1 times [2021-11-12 22:21:06,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:06,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136012964] [2021-11-12 22:21:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:06,598 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:06,599 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:06,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:21:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:07,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:21:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:07,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:07,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:07,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136012964] [2021-11-12 22:21:07,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136012964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:07,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:07,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:21:07,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438000749] [2021-11-12 22:21:07,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:07,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:21:07,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:07,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:21:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:21:07,884 INFO L87 Difference]: Start difference. First operand 640 states and 1046 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:08,299 INFO L93 Difference]: Finished difference Result 1279 states and 2098 transitions. [2021-11-12 22:21:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:21:08,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-12 22:21:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:08,306 INFO L225 Difference]: With dead ends: 1279 [2021-11-12 22:21:08,306 INFO L226 Difference]: Without dead ends: 646 [2021-11-12 22:21:08,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:21:08,313 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 111 mSDsluCounter, 9186 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 268.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 10116 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.43ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 302.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:08,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 10116 Invalid, 250 Unknown, 0 Unchecked, 14.43ms Time], IncrementalHoareTripleChecker [6 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 302.30ms Time] [2021-11-12 22:21:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-12 22:21:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 636. [2021-11-12 22:21:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 489 states have (on average 1.638036809815951) internal successors, (801), 514 states have internal predecessors, (801), 112 states have call successors, (112), 27 states have call predecessors, (112), 34 states have return successors, (121), 107 states have call predecessors, (121), 109 states have call successors, (121) [2021-11-12 22:21:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1034 transitions. [2021-11-12 22:21:08,346 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1034 transitions. Word has length 117 [2021-11-12 22:21:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:08,346 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1034 transitions. [2021-11-12 22:21:08,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1034 transitions. [2021-11-12 22:21:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 22:21:08,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:08,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:08,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:08,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:08,571 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:08,571 INFO L85 PathProgramCache]: Analyzing trace with hash 841919726, now seen corresponding path program 1 times [2021-11-12 22:21:08,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:08,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506353718] [2021-11-12 22:21:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:08,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:08,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:08,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:21:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:09,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:09,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:09,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:09,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506353718] [2021-11-12 22:21:09,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506353718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:09,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:09,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:21:09,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988883560] [2021-11-12 22:21:09,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:09,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:09,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:09,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:09,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:09,606 INFO L87 Difference]: Start difference. First operand 636 states and 1034 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:21:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:09,672 INFO L93 Difference]: Finished difference Result 1248 states and 2033 transitions. [2021-11-12 22:21:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:21:09,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2021-11-12 22:21:09,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:09,677 INFO L225 Difference]: With dead ends: 1248 [2021-11-12 22:21:09,677 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:21:09,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:09,683 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 32 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:09,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1879 Invalid, 17 Unknown, 0 Unchecked, 2.82ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 20.11ms Time] [2021-11-12 22:21:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:21:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:21:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 416 states have (on average 1.6225961538461537) internal successors, (675), 432 states have internal predecessors, (675), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:21:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 888 transitions. [2021-11-12 22:21:09,707 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 888 transitions. Word has length 117 [2021-11-12 22:21:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:09,708 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 888 transitions. [2021-11-12 22:21:09,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:21:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 888 transitions. [2021-11-12 22:21:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:21:09,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:09,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:09,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:09,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:09,919 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash 266264236, now seen corresponding path program 1 times [2021-11-12 22:21:09,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:09,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949508741] [2021-11-12 22:21:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:09,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:09,921 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:09,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:21:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:10,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:21:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:10,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:11,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:11,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949508741] [2021-11-12 22:21:11,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949508741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:11,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:11,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:21:11,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550057580] [2021-11-12 22:21:11,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:11,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:21:11,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:11,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:21:11,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:21:11,202 INFO L87 Difference]: Start difference. First operand 550 states and 888 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:11,440 INFO L93 Difference]: Finished difference Result 1087 states and 1764 transitions. [2021-11-12 22:21:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:11,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 118 [2021-11-12 22:21:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:11,446 INFO L225 Difference]: With dead ends: 1087 [2021-11-12 22:21:11,446 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:21:11,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:21:11,452 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 51 mSDsluCounter, 7793 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8664 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:11,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 8664 Invalid, 135 Unknown, 0 Unchecked, 11.67ms Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 150.07ms Time] [2021-11-12 22:21:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:21:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:21:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 416 states have (on average 1.6201923076923077) internal successors, (674), 432 states have internal predecessors, (674), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:21:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 887 transitions. [2021-11-12 22:21:11,476 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 887 transitions. Word has length 118 [2021-11-12 22:21:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:11,476 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 887 transitions. [2021-11-12 22:21:11,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 887 transitions. [2021-11-12 22:21:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-12 22:21:11,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:11,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:11,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:11,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:11,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1217876995, now seen corresponding path program 1 times [2021-11-12 22:21:11,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:11,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150942865] [2021-11-12 22:21:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:11,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:11,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:11,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:11,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:21:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:12,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:21:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:12,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:13,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:13,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150942865] [2021-11-12 22:21:13,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150942865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:13,060 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:13,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:21:13,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376134135] [2021-11-12 22:21:13,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:13,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:21:13,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:21:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:21:13,062 INFO L87 Difference]: Start difference. First operand 550 states and 887 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:13,211 INFO L93 Difference]: Finished difference Result 1087 states and 1762 transitions. [2021-11-12 22:21:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 119 [2021-11-12 22:21:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:13,218 INFO L225 Difference]: With dead ends: 1087 [2021-11-12 22:21:13,218 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:21:13,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:21:13,223 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 70 mSDsluCounter, 5199 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6070 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.48ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:13,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6070 Invalid, 93 Unknown, 0 Unchecked, 8.48ms Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 83.13ms Time] [2021-11-12 22:21:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:21:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:21:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 416 states have (on average 1.6177884615384615) internal successors, (673), 432 states have internal predecessors, (673), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:21:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 886 transitions. [2021-11-12 22:21:13,246 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 886 transitions. Word has length 119 [2021-11-12 22:21:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:13,247 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 886 transitions. [2021-11-12 22:21:13,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 886 transitions. [2021-11-12 22:21:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:21:13,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:13,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:13,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:13,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:13,466 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1098142447, now seen corresponding path program 1 times [2021-11-12 22:21:13,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:13,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697370758] [2021-11-12 22:21:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:13,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:13,468 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:13,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:21:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:21:13,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:14,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:14,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:14,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697370758] [2021-11-12 22:21:14,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697370758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:14,715 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:14,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:21:14,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353546257] [2021-11-12 22:21:14,715 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:14,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:21:14,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:21:14,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:21:14,717 INFO L87 Difference]: Start difference. First operand 550 states and 886 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:14,887 INFO L93 Difference]: Finished difference Result 1087 states and 1760 transitions. [2021-11-12 22:21:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2021-11-12 22:21:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:14,893 INFO L225 Difference]: With dead ends: 1087 [2021-11-12 22:21:14,893 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:21:14,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:21:14,898 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 63 mSDsluCounter, 6071 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6942 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:14,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 6942 Invalid, 107 Unknown, 0 Unchecked, 8.39ms Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 104.39ms Time] [2021-11-12 22:21:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:21:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:21:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 416 states have (on average 1.6153846153846154) internal successors, (672), 432 states have internal predecessors, (672), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:21:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 885 transitions. [2021-11-12 22:21:14,921 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 885 transitions. Word has length 120 [2021-11-12 22:21:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 885 transitions. [2021-11-12 22:21:14,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 22:21:14,922 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 885 transitions. [2021-11-12 22:21:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:21:14,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:14,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:14,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:15,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:15,142 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash 244937802, now seen corresponding path program 1 times [2021-11-12 22:21:15,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:15,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772730364] [2021-11-12 22:21:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:15,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:15,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:15,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:15,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:21:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:21:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:15,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:21:16,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:16,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772730364] [2021-11-12 22:21:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772730364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:16,390 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:16,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:21:16,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568845326] [2021-11-12 22:21:16,390 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:16,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:21:16,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:21:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:21:16,392 INFO L87 Difference]: Start difference. First operand 550 states and 885 transitions. Second operand has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:21:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:16,525 INFO L93 Difference]: Finished difference Result 1087 states and 1758 transitions. [2021-11-12 22:21:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 121 [2021-11-12 22:21:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:16,532 INFO L225 Difference]: With dead ends: 1087 [2021-11-12 22:21:16,532 INFO L226 Difference]: Without dead ends: 550 [2021-11-12 22:21:16,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:16,537 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 35 mSDsluCounter, 5187 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6058 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:16,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 6058 Invalid, 76 Unknown, 0 Unchecked, 6.99ms Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 77.83ms Time] [2021-11-12 22:21:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-12 22:21:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-12 22:21:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 416 states have (on average 1.6129807692307692) internal successors, (671), 432 states have internal predecessors, (671), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 22:21:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 884 transitions. [2021-11-12 22:21:16,571 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 884 transitions. Word has length 121 [2021-11-12 22:21:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:16,572 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 884 transitions. [2021-11-12 22:21:16,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:21:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 884 transitions. [2021-11-12 22:21:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:21:16,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:16,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:16,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:16,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:16,797 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1631545016, now seen corresponding path program 1 times [2021-11-12 22:21:16,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:16,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021322964] [2021-11-12 22:21:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:16,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:16,799 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:16,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:21:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:21:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:21:17,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:21:17,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:17,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021322964] [2021-11-12 22:21:17,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021322964] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:17,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:17,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:21:17,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648293194] [2021-11-12 22:21:17,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:17,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:21:17,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:21:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:21:17,888 INFO L87 Difference]: Start difference. First operand 550 states and 884 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:21:19,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:20,881 INFO L93 Difference]: Finished difference Result 1617 states and 2636 transitions. [2021-11-12 22:21:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:21:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 121 [2021-11-12 22:21:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:20,891 INFO L225 Difference]: With dead ends: 1617 [2021-11-12 22:21:20,892 INFO L226 Difference]: Without dead ends: 1085 [2021-11-12 22:21:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:20,901 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 866 mSDsluCounter, 3398 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 134 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2766.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 4355 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.19ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2880.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:20,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 4355 Invalid, 487 Unknown, 0 Unchecked, 21.19ms Time], IncrementalHoareTripleChecker [134 Valid, 352 Invalid, 1 Unknown, 0 Unchecked, 2880.22ms Time] [2021-11-12 22:21:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-11-12 22:21:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1076. [2021-11-12 22:21:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 817 states have (on average 1.6156670746634028) internal successors, (1320), 848 states have internal predecessors, (1320), 208 states have call successors, (208), 50 states have call predecessors, (208), 50 states have return successors, (219), 203 states have call predecessors, (219), 204 states have call successors, (219) [2021-11-12 22:21:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1747 transitions. [2021-11-12 22:21:20,992 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1747 transitions. Word has length 121 [2021-11-12 22:21:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:20,992 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1747 transitions. [2021-11-12 22:21:20,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 22:21:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1747 transitions. [2021-11-12 22:21:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:21:20,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:20,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:21,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:21,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:21,216 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:21,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:21,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2008845240, now seen corresponding path program 1 times [2021-11-12 22:21:21,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:21,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126792323] [2021-11-12 22:21:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:21,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:21,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:21,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:21,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:21:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:21:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:21:21,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:21:22,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:22,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126792323] [2021-11-12 22:21:22,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126792323] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:21:22,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:21:22,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:21:22,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051203340] [2021-11-12 22:21:22,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:22,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:21:22,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:21:22,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:21:22,333 INFO L87 Difference]: Start difference. First operand 1076 states and 1747 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:21:24,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:25,512 INFO L93 Difference]: Finished difference Result 2635 states and 4295 transitions. [2021-11-12 22:21:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:21:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2021-11-12 22:21:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:25,527 INFO L225 Difference]: With dead ends: 2635 [2021-11-12 22:21:25,527 INFO L226 Difference]: Without dead ends: 1577 [2021-11-12 22:21:25,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:21:25,536 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 745 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 156 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2910.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.65ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3047.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:25,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 4147 Invalid, 700 Unknown, 0 Unchecked, 12.65ms Time], IncrementalHoareTripleChecker [156 Valid, 543 Invalid, 1 Unknown, 0 Unchecked, 3047.91ms Time] [2021-11-12 22:21:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-11-12 22:21:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1567. [2021-11-12 22:21:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1189 states have (on average 1.5895710681244744) internal successors, (1890), 1234 states have internal predecessors, (1890), 302 states have call successors, (302), 75 states have call predecessors, (302), 75 states have return successors, (324), 295 states have call predecessors, (324), 297 states have call successors, (324) [2021-11-12 22:21:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2516 transitions. [2021-11-12 22:21:25,620 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2516 transitions. Word has length 121 [2021-11-12 22:21:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:25,620 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 2516 transitions. [2021-11-12 22:21:25,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-12 22:21:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2516 transitions. [2021-11-12 22:21:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 22:21:25,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:25,624 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:25,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:25,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:25,838 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -363033273, now seen corresponding path program 1 times [2021-11-12 22:21:25,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:25,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571661817] [2021-11-12 22:21:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:25,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:25,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:25,841 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:25,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:21:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:26,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:21:26,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:21:26,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:21:26,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:26,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571661817] [2021-11-12 22:21:26,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571661817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:26,981 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:26,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:21:26,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990865897] [2021-11-12 22:21:26,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:26,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:21:26,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:21:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:26,982 INFO L87 Difference]: Start difference. First operand 1567 states and 2516 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:21:29,013 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:31,271 INFO L93 Difference]: Finished difference Result 5580 states and 9386 transitions. [2021-11-12 22:21:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 126 [2021-11-12 22:21:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:31,353 INFO L225 Difference]: With dead ends: 5580 [2021-11-12 22:21:31,354 INFO L226 Difference]: Without dead ends: 4031 [2021-11-12 22:21:31,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:21:31,368 INFO L933 BasicCegarLoop]: 1334 mSDtfsCounter, 1156 mSDsluCounter, 5488 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 94 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3773.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 6822 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.10ms SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4024.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:31,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 6822 Invalid, 1095 Unknown, 0 Unchecked, 25.10ms Time], IncrementalHoareTripleChecker [94 Valid, 1000 Invalid, 1 Unknown, 0 Unchecked, 4024.52ms Time] [2021-11-12 22:21:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-11-12 22:21:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3080. [2021-11-12 22:21:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 2341 states have (on average 1.5852199914566425) internal successors, (3711), 2432 states have internal predecessors, (3711), 584 states have call successors, (584), 147 states have call predecessors, (584), 154 states have return successors, (727), 576 states have call predecessors, (727), 576 states have call successors, (727) [2021-11-12 22:21:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 5022 transitions. [2021-11-12 22:21:31,605 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 5022 transitions. Word has length 126 [2021-11-12 22:21:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:31,606 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 5022 transitions. [2021-11-12 22:21:31,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 22:21:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 5022 transitions. [2021-11-12 22:21:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:21:31,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:31,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:31,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:31,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:31,822 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:31,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1021625650, now seen corresponding path program 1 times [2021-11-12 22:21:31,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:31,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472189744] [2021-11-12 22:21:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:31,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:31,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:31,825 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:31,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:21:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:21:32,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:21:32,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:32,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472189744] [2021-11-12 22:21:32,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472189744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:32,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:32,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:21:32,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618065258] [2021-11-12 22:21:32,807 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:32,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:32,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:32,808 INFO L87 Difference]: Start difference. First operand 3080 states and 5022 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:21:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:33,074 INFO L93 Difference]: Finished difference Result 6160 states and 10172 transitions. [2021-11-12 22:21:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2021-11-12 22:21:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:33,101 INFO L225 Difference]: With dead ends: 6160 [2021-11-12 22:21:33,101 INFO L226 Difference]: Without dead ends: 3098 [2021-11-12 22:21:33,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:33,130 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 19 mSDsluCounter, 2551 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3415 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.46ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.47ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:33,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3415 Invalid, 89 Unknown, 0 Unchecked, 6.46ms Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 113.47ms Time] [2021-11-12 22:21:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-11-12 22:21:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 3092. [2021-11-12 22:21:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3092 states, 2350 states have (on average 1.5817021276595744) internal successors, (3717), 2441 states have internal predecessors, (3717), 584 states have call successors, (584), 153 states have call predecessors, (584), 157 states have return successors, (711), 573 states have call predecessors, (711), 576 states have call successors, (711) [2021-11-12 22:21:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3092 states to 3092 states and 5012 transitions. [2021-11-12 22:21:33,353 INFO L78 Accepts]: Start accepts. Automaton has 3092 states and 5012 transitions. Word has length 127 [2021-11-12 22:21:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:33,354 INFO L470 AbstractCegarLoop]: Abstraction has 3092 states and 5012 transitions. [2021-11-12 22:21:33,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 22:21:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3092 states and 5012 transitions. [2021-11-12 22:21:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 22:21:33,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:33,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:33,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:33,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:33,574 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:33,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:33,575 INFO L85 PathProgramCache]: Analyzing trace with hash -577785260, now seen corresponding path program 1 times [2021-11-12 22:21:33,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:33,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389623148] [2021-11-12 22:21:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:33,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:33,577 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:33,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:21:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:21:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:21:34,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:21:34,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:34,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389623148] [2021-11-12 22:21:34,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389623148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:34,645 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:34,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:21:34,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466863975] [2021-11-12 22:21:34,645 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:34,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:21:34,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:34,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:21:34,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:34,647 INFO L87 Difference]: Start difference. First operand 3092 states and 5012 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:21:36,665 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:38,976 INFO L93 Difference]: Finished difference Result 11084 states and 19079 transitions. [2021-11-12 22:21:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:38,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 135 [2021-11-12 22:21:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:39,050 INFO L225 Difference]: With dead ends: 11084 [2021-11-12 22:21:39,051 INFO L226 Difference]: Without dead ends: 8010 [2021-11-12 22:21:39,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:21:39,069 INFO L933 BasicCegarLoop]: 1319 mSDtfsCounter, 1130 mSDsluCounter, 5446 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 90 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3608.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 6765 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.60ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3870.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:39,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 6765 Invalid, 1082 Unknown, 0 Unchecked, 22.60ms Time], IncrementalHoareTripleChecker [90 Valid, 991 Invalid, 1 Unknown, 0 Unchecked, 3870.34ms Time] [2021-11-12 22:21:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-11-12 22:21:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 6160. [2021-11-12 22:21:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 4684 states have (on average 1.5770708795900938) internal successors, (7387), 4870 states have internal predecessors, (7387), 1151 states have call successors, (1151), 303 states have call predecessors, (1151), 324 states have return successors, (1650), 1138 states have call predecessors, (1650), 1137 states have call successors, (1650) [2021-11-12 22:21:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 10188 transitions. [2021-11-12 22:21:39,605 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 10188 transitions. Word has length 135 [2021-11-12 22:21:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:39,606 INFO L470 AbstractCegarLoop]: Abstraction has 6160 states and 10188 transitions. [2021-11-12 22:21:39,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 22:21:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 10188 transitions. [2021-11-12 22:21:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:21:39,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:39,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:39,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:39,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:39,830 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash -140723187, now seen corresponding path program 1 times [2021-11-12 22:21:39,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:39,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055732749] [2021-11-12 22:21:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:39,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:39,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:39,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:21:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:40,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:40,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:21:40,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:21:40,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:40,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055732749] [2021-11-12 22:21:40,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055732749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:40,826 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:40,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:21:40,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886996331] [2021-11-12 22:21:40,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:40,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:40,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:40,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:40,828 INFO L87 Difference]: Start difference. First operand 6160 states and 10188 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:21:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:41,282 INFO L93 Difference]: Finished difference Result 12374 states and 20799 transitions. [2021-11-12 22:21:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:41,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 136 [2021-11-12 22:21:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:41,353 INFO L225 Difference]: With dead ends: 12374 [2021-11-12 22:21:41,353 INFO L226 Difference]: Without dead ends: 6232 [2021-11-12 22:21:41,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:41,391 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 21 mSDsluCounter, 2551 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.51ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:41,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3413 Invalid, 86 Unknown, 0 Unchecked, 4.51ms Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 85.83ms Time] [2021-11-12 22:21:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6232 states. [2021-11-12 22:21:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6232 to 6220. [2021-11-12 22:21:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6220 states, 4738 states have (on average 1.571760236386661) internal successors, (7447), 4912 states have internal predecessors, (7447), 1151 states have call successors, (1151), 327 states have call predecessors, (1151), 330 states have return successors, (1626), 1132 states have call predecessors, (1626), 1137 states have call successors, (1626) [2021-11-12 22:21:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6220 states to 6220 states and 10224 transitions. [2021-11-12 22:21:41,844 INFO L78 Accepts]: Start accepts. Automaton has 6220 states and 10224 transitions. Word has length 136 [2021-11-12 22:21:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:41,844 INFO L470 AbstractCegarLoop]: Abstraction has 6220 states and 10224 transitions. [2021-11-12 22:21:41,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:21:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6220 states and 10224 transitions. [2021-11-12 22:21:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 22:21:41,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:41,847 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:41,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:42,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:42,066 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 563503440, now seen corresponding path program 1 times [2021-11-12 22:21:42,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:42,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563694682] [2021-11-12 22:21:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:42,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:42,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:42,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:21:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:42,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:21:42,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:21:42,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:21:43,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:43,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563694682] [2021-11-12 22:21:43,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563694682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:43,175 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:43,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:21:43,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46595161] [2021-11-12 22:21:43,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:43,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:21:43,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:43,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:21:43,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:43,178 INFO L87 Difference]: Start difference. First operand 6220 states and 10224 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:21:45,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:47,708 INFO L93 Difference]: Finished difference Result 22282 states and 39704 transitions. [2021-11-12 22:21:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:21:47,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 145 [2021-11-12 22:21:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:47,811 INFO L225 Difference]: With dead ends: 22282 [2021-11-12 22:21:47,811 INFO L226 Difference]: Without dead ends: 16080 [2021-11-12 22:21:47,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:21:47,858 INFO L933 BasicCegarLoop]: 1315 mSDtfsCounter, 1108 mSDsluCounter, 5445 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3447.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 6760 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.12ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3700.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:47,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 6760 Invalid, 1065 Unknown, 0 Unchecked, 18.12ms Time], IncrementalHoareTripleChecker [86 Valid, 978 Invalid, 1 Unknown, 0 Unchecked, 3700.28ms Time] [2021-11-12 22:21:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16080 states. [2021-11-12 22:21:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16080 to 12464. [2021-11-12 22:21:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12464 states, 9493 states have (on average 1.5670494048246075) internal successors, (14876), 9851 states have internal predecessors, (14876), 2288 states have call successors, (2288), 651 states have call predecessors, (2288), 682 states have return successors, (3889), 2265 states have call predecessors, (3889), 2262 states have call successors, (3889) [2021-11-12 22:21:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12464 states to 12464 states and 21053 transitions. [2021-11-12 22:21:49,027 INFO L78 Accepts]: Start accepts. Automaton has 12464 states and 21053 transitions. Word has length 145 [2021-11-12 22:21:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:49,028 INFO L470 AbstractCegarLoop]: Abstraction has 12464 states and 21053 transitions. [2021-11-12 22:21:49,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-12 22:21:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 12464 states and 21053 transitions. [2021-11-12 22:21:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 22:21:49,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:49,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:49,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:49,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:49,251 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2079483609, now seen corresponding path program 1 times [2021-11-12 22:21:49,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:49,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421836647] [2021-11-12 22:21:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:49,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:49,254 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:49,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:21:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:49,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:21:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:21:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 22:21:50,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:50,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421836647] [2021-11-12 22:21:50,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421836647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:50,275 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:50,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:21:50,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6641355] [2021-11-12 22:21:50,275 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:50,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:21:50,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:21:50,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:21:50,277 INFO L87 Difference]: Start difference. First operand 12464 states and 21053 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:21:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:50,881 INFO L93 Difference]: Finished difference Result 25054 states and 43333 transitions. [2021-11-12 22:21:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:21:50,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 146 [2021-11-12 22:21:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:50,956 INFO L225 Difference]: With dead ends: 25054 [2021-11-12 22:21:50,956 INFO L226 Difference]: Without dead ends: 12608 [2021-11-12 22:21:51,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:21:51,110 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 34 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:51,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1713 Invalid, 68 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 62.30ms Time] [2021-11-12 22:21:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12608 states. [2021-11-12 22:21:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12608 to 12584. [2021-11-12 22:21:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12584 states, 9601 states have (on average 1.561920633267368) internal successors, (14996), 9959 states have internal predecessors, (14996), 2288 states have call successors, (2288), 675 states have call predecessors, (2288), 694 states have return successors, (3857), 2253 states have call predecessors, (3857), 2262 states have call successors, (3857) [2021-11-12 22:21:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12584 states to 12584 states and 21141 transitions. [2021-11-12 22:21:51,912 INFO L78 Accepts]: Start accepts. Automaton has 12584 states and 21141 transitions. Word has length 146 [2021-11-12 22:21:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:21:51,913 INFO L470 AbstractCegarLoop]: Abstraction has 12584 states and 21141 transitions. [2021-11-12 22:21:51,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-12 22:21:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 12584 states and 21141 transitions. [2021-11-12 22:21:51,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 22:21:51,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:21:51,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:21:51,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:21:52,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:21:52,128 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:21:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:21:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1487654933, now seen corresponding path program 1 times [2021-11-12 22:21:52,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:21:52,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109021174] [2021-11-12 22:21:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:21:52,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:21:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:21:52,131 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:21:52,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:21:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:21:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:21:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:21:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:21:53,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:21:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:21:53,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:21:53,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109021174] [2021-11-12 22:21:53,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109021174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:21:53,496 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:21:53,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:21:53,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715602603] [2021-11-12 22:21:53,496 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:21:53,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:21:53,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:21:53,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:21:53,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:21:53,497 INFO L87 Difference]: Start difference. First operand 12584 states and 21141 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:21:55,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:21:57,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:00,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:00,655 INFO L93 Difference]: Finished difference Result 44926 states and 84338 transitions. [2021-11-12 22:22:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:22:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 156 [2021-11-12 22:22:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:00,873 INFO L225 Difference]: With dead ends: 44926 [2021-11-12 22:22:00,874 INFO L226 Difference]: Without dead ends: 32360 [2021-11-12 22:22:00,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:22:00,987 INFO L933 BasicCegarLoop]: 1150 mSDtfsCounter, 1174 mSDsluCounter, 4938 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 143 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5344.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 6088 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.80ms SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5557.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:00,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 6088 Invalid, 992 Unknown, 0 Unchecked, 12.80ms Time], IncrementalHoareTripleChecker [143 Valid, 847 Invalid, 2 Unknown, 0 Unchecked, 5557.27ms Time] [2021-11-12 22:22:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32360 states. [2021-11-12 22:22:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32360 to 25276. [2021-11-12 22:22:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25276 states, 19276 states have (on average 1.5572214152313757) internal successors, (30017), 20014 states have internal predecessors, (30017), 4565 states have call successors, (4565), 1347 states have call predecessors, (4565), 1434 states have return successors, (9536), 4522 states have call predecessors, (9536), 4515 states have call successors, (9536) [2021-11-12 22:22:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25276 states to 25276 states and 44118 transitions. [2021-11-12 22:22:03,495 INFO L78 Accepts]: Start accepts. Automaton has 25276 states and 44118 transitions. Word has length 156 [2021-11-12 22:22:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:03,498 INFO L470 AbstractCegarLoop]: Abstraction has 25276 states and 44118 transitions. [2021-11-12 22:22:03,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-12 22:22:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 25276 states and 44118 transitions. [2021-11-12 22:22:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-12 22:22:03,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:03,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:03,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:03,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:03,720 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:03,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1720834066, now seen corresponding path program 1 times [2021-11-12 22:22:03,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:03,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430281533] [2021-11-12 22:22:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:03,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:03,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:03,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:22:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:22:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:22:04,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:22:04,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:04,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430281533] [2021-11-12 22:22:04,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430281533] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:04,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:04,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:22:04,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772331227] [2021-11-12 22:22:04,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:04,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:22:04,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:22:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:22:04,896 INFO L87 Difference]: Start difference. First operand 25276 states and 44118 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:06,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:08,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:11,478 INFO L93 Difference]: Finished difference Result 50726 states and 92820 transitions. [2021-11-12 22:22:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:22:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-12 22:22:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:11,646 INFO L225 Difference]: With dead ends: 50726 [2021-11-12 22:22:11,647 INFO L226 Difference]: Without dead ends: 25468 [2021-11-12 22:22:12,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:22:12,088 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 791 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4655.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.63ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4760.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:12,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 2165 Invalid, 489 Unknown, 0 Unchecked, 4.63ms Time], IncrementalHoareTripleChecker [16 Valid, 471 Invalid, 2 Unknown, 0 Unchecked, 4760.85ms Time] [2021-11-12 22:22:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25468 states. [2021-11-12 22:22:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25468 to 25468. [2021-11-12 22:22:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25468 states, 19420 states have (on average 1.5530895983522142) internal successors, (30161), 20158 states have internal predecessors, (30161), 4565 states have call successors, (4565), 1395 states have call predecessors, (4565), 1482 states have return successors, (9584), 4522 states have call predecessors, (9584), 4515 states have call successors, (9584) [2021-11-12 22:22:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25468 states to 25468 states and 44310 transitions. [2021-11-12 22:22:13,932 INFO L78 Accepts]: Start accepts. Automaton has 25468 states and 44310 transitions. Word has length 157 [2021-11-12 22:22:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:13,933 INFO L470 AbstractCegarLoop]: Abstraction has 25468 states and 44310 transitions. [2021-11-12 22:22:13,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 25468 states and 44310 transitions. [2021-11-12 22:22:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 22:22:13,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:13,937 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:13,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:14,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:14,151 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1849394040, now seen corresponding path program 1 times [2021-11-12 22:22:14,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:14,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436173380] [2021-11-12 22:22:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:14,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:14,153 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:14,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:22:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:22:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:22:15,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:22:15,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:15,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436173380] [2021-11-12 22:22:15,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436173380] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:15,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:15,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:22:15,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529427850] [2021-11-12 22:22:15,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:15,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:22:15,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:22:15,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:22:15,488 INFO L87 Difference]: Start difference. First operand 25468 states and 44310 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:17,517 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:19,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:21,787 INFO L93 Difference]: Finished difference Result 51158 states and 93172 transitions. [2021-11-12 22:22:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:22:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2021-11-12 22:22:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:21,960 INFO L225 Difference]: With dead ends: 51158 [2021-11-12 22:22:21,960 INFO L226 Difference]: Without dead ends: 25708 [2021-11-12 22:22:22,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:22:22,416 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 779 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4634.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.10ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4749.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:22,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 2166 Invalid, 491 Unknown, 0 Unchecked, 5.10ms Time], IncrementalHoareTripleChecker [14 Valid, 475 Invalid, 2 Unknown, 0 Unchecked, 4749.20ms Time] [2021-11-12 22:22:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25708 states. [2021-11-12 22:22:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25708 to 25708. [2021-11-12 22:22:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 19612 states have (on average 1.5476748929227004) internal successors, (30353), 20350 states have internal predecessors, (30353), 4565 states have call successors, (4565), 1443 states have call predecessors, (4565), 1530 states have return successors, (9632), 4522 states have call predecessors, (9632), 4515 states have call successors, (9632) [2021-11-12 22:22:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 44550 transitions. [2021-11-12 22:22:24,254 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 44550 transitions. Word has length 159 [2021-11-12 22:22:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:24,254 INFO L470 AbstractCegarLoop]: Abstraction has 25708 states and 44550 transitions. [2021-11-12 22:22:24,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 44550 transitions. [2021-11-12 22:22:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 22:22:24,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:24,257 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:24,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:24,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:24,471 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:24,471 INFO L85 PathProgramCache]: Analyzing trace with hash -827221806, now seen corresponding path program 1 times [2021-11-12 22:22:24,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:24,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108429984] [2021-11-12 22:22:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:24,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:24,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:24,473 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:24,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:22:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:22:24,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:22:25,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:22:25,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:25,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108429984] [2021-11-12 22:22:25,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108429984] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:25,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:25,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:22:25,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796746772] [2021-11-12 22:22:25,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:25,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:22:25,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:25,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:22:25,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:22:25,919 INFO L87 Difference]: Start difference. First operand 25708 states and 44550 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:27,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:29,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:32,488 INFO L93 Difference]: Finished difference Result 51686 states and 93644 transitions. [2021-11-12 22:22:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:22:32,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-12 22:22:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:32,678 INFO L225 Difference]: With dead ends: 51686 [2021-11-12 22:22:32,679 INFO L226 Difference]: Without dead ends: 25996 [2021-11-12 22:22:32,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:22:32,968 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 789 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4662.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4774.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:32,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2166 Invalid, 490 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 2 Unknown, 0 Unchecked, 4774.09ms Time] [2021-11-12 22:22:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25996 states. [2021-11-12 22:22:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25996 to 25996. [2021-11-12 22:22:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25996 states, 19852 states have (on average 1.5410537981059842) internal successors, (30593), 20590 states have internal predecessors, (30593), 4565 states have call successors, (4565), 1491 states have call predecessors, (4565), 1578 states have return successors, (9680), 4522 states have call predecessors, (9680), 4515 states have call successors, (9680) [2021-11-12 22:22:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25996 states to 25996 states and 44838 transitions. [2021-11-12 22:22:34,601 INFO L78 Accepts]: Start accepts. Automaton has 25996 states and 44838 transitions. Word has length 161 [2021-11-12 22:22:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:34,601 INFO L470 AbstractCegarLoop]: Abstraction has 25996 states and 44838 transitions. [2021-11-12 22:22:34,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:34,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25996 states and 44838 transitions. [2021-11-12 22:22:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 22:22:34,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:34,603 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:34,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:34,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:34,804 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:34,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:34,805 INFO L85 PathProgramCache]: Analyzing trace with hash -681726928, now seen corresponding path program 1 times [2021-11-12 22:22:34,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:34,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713594723] [2021-11-12 22:22:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:34,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:34,806 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:34,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:22:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:22:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 22:22:35,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:22:36,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:36,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713594723] [2021-11-12 22:22:36,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713594723] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:36,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:36,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:22:36,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088900198] [2021-11-12 22:22:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:36,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:22:36,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:22:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:22:36,046 INFO L87 Difference]: Start difference. First operand 25996 states and 44838 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:38,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:40,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:42,731 INFO L93 Difference]: Finished difference Result 52310 states and 94224 transitions. [2021-11-12 22:22:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:22:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2021-11-12 22:22:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:22:42,881 INFO L225 Difference]: With dead ends: 52310 [2021-11-12 22:22:42,881 INFO L226 Difference]: Without dead ends: 26332 [2021-11-12 22:22:43,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:22:43,100 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 786 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4675.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.25ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4945.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:22:43,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 2166 Invalid, 489 Unknown, 0 Unchecked, 5.25ms Time], IncrementalHoareTripleChecker [10 Valid, 477 Invalid, 2 Unknown, 0 Unchecked, 4945.44ms Time] [2021-11-12 22:22:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26332 states. [2021-11-12 22:22:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26332 to 26332. [2021-11-12 22:22:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26332 states, 20140 states have (on average 1.5333167825223435) internal successors, (30881), 20878 states have internal predecessors, (30881), 4565 states have call successors, (4565), 1539 states have call predecessors, (4565), 1626 states have return successors, (9728), 4522 states have call predecessors, (9728), 4515 states have call successors, (9728) [2021-11-12 22:22:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26332 states to 26332 states and 45174 transitions. [2021-11-12 22:22:44,684 INFO L78 Accepts]: Start accepts. Automaton has 26332 states and 45174 transitions. Word has length 163 [2021-11-12 22:22:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:22:44,685 INFO L470 AbstractCegarLoop]: Abstraction has 26332 states and 45174 transitions. [2021-11-12 22:22:44,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 22:22:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26332 states and 45174 transitions. [2021-11-12 22:22:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:22:44,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:22:44,687 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:22:44,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:22:44,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:22:44,891 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:22:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:22:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash 435390354, now seen corresponding path program 1 times [2021-11-12 22:22:44,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:22:44,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986158242] [2021-11-12 22:22:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:22:44,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:22:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:22:44,894 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:22:44,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:22:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:22:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:22:45,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:22:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 22:22:46,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:22:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 22:22:46,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:22:46,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986158242] [2021-11-12 22:22:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986158242] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:22:46,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:22:46,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-12 22:22:46,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82829885] [2021-11-12 22:22:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:22:46,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:22:46,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:22:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:22:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:22:46,543 INFO L87 Difference]: Start difference. First operand 26332 states and 45174 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:22:48,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:50,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:52,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:54,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:22:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:22:59,630 INFO L93 Difference]: Finished difference Result 59006 states and 107340 transitions. [2021-11-12 22:22:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:22:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-12 22:22:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:00,012 INFO L225 Difference]: With dead ends: 59006 [2021-11-12 22:23:00,012 INFO L226 Difference]: Without dead ends: 32692 [2021-11-12 22:23:00,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:23:00,151 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 2379 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 325 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10566.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.85ms SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10950.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:00,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2436 Valid, 3833 Invalid, 2367 Unknown, 0 Unchecked, 13.85ms Time], IncrementalHoareTripleChecker [325 Valid, 2038 Invalid, 4 Unknown, 0 Unchecked, 10950.52ms Time] [2021-11-12 22:23:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32692 states. [2021-11-12 22:23:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32692 to 26332. [2021-11-12 22:23:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26332 states, 20140 states have (on average 1.532522343594836) internal successors, (30865), 20878 states have internal predecessors, (30865), 4565 states have call successors, (4565), 1539 states have call predecessors, (4565), 1626 states have return successors, (9728), 4522 states have call predecessors, (9728), 4515 states have call successors, (9728) [2021-11-12 22:23:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26332 states to 26332 states and 45158 transitions. [2021-11-12 22:23:01,817 INFO L78 Accepts]: Start accepts. Automaton has 26332 states and 45158 transitions. Word has length 165 [2021-11-12 22:23:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:01,817 INFO L470 AbstractCegarLoop]: Abstraction has 26332 states and 45158 transitions. [2021-11-12 22:23:01,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-12 22:23:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 26332 states and 45158 transitions. [2021-11-12 22:23:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:23:01,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:01,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:01,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:02,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:02,020 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1778356196, now seen corresponding path program 1 times [2021-11-12 22:23:02,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:02,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215929364] [2021-11-12 22:23:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:02,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:02,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:02,022 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:02,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:23:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:23:02,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 22:23:02,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:23:03,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:03,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215929364] [2021-11-12 22:23:03,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215929364] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:23:03,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:23:03,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-12 22:23:03,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726033448] [2021-11-12 22:23:03,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:03,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:23:03,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:23:03,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:23:03,305 INFO L87 Difference]: Start difference. First operand 26332 states and 45158 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:23:05,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:09,856 INFO L93 Difference]: Finished difference Result 88514 states and 164748 transitions. [2021-11-12 22:23:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:23:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 171 [2021-11-12 22:23:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:10,600 INFO L225 Difference]: With dead ends: 88514 [2021-11-12 22:23:10,600 INFO L226 Difference]: Without dead ends: 62200 [2021-11-12 22:23:10,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:23:10,817 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 1009 mSDsluCounter, 5537 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 89 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3070.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 6812 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.21ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3232.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:10,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 6812 Invalid, 1127 Unknown, 0 Unchecked, 12.21ms Time], IncrementalHoareTripleChecker [89 Valid, 1037 Invalid, 1 Unknown, 0 Unchecked, 3232.14ms Time] [2021-11-12 22:23:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62200 states. [2021-11-12 22:23:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62200 to 58496. [2021-11-12 22:23:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58496 states, 42715 states have (on average 1.5332552967341684) internal successors, (65493), 45053 states have internal predecessors, (65493), 12530 states have call successors, (12530), 2883 states have call predecessors, (12530), 3250 states have return successors, (29107), 12591 states have call predecessors, (29107), 12480 states have call successors, (29107) [2021-11-12 22:23:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58496 states to 58496 states and 107130 transitions. [2021-11-12 22:23:15,415 INFO L78 Accepts]: Start accepts. Automaton has 58496 states and 107130 transitions. Word has length 171 [2021-11-12 22:23:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:23:15,415 INFO L470 AbstractCegarLoop]: Abstraction has 58496 states and 107130 transitions. [2021-11-12 22:23:15,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 22:23:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 58496 states and 107130 transitions. [2021-11-12 22:23:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:23:15,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:23:15,418 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:23:15,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:23:15,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:23:15,619 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:23:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:23:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2099195964, now seen corresponding path program 1 times [2021-11-12 22:23:15,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:23:15,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700189626] [2021-11-12 22:23:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:23:15,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:23:15,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:23:15,621 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:23:15,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adf2d829-a5f7-4f8f-8c50-f835386551e0/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:23:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:23:16,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:23:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:23:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:23:16,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:23:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 22:23:16,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:23:16,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700189626] [2021-11-12 22:23:16,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700189626] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:23:16,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:23:16,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 22:23:16,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723783206] [2021-11-12 22:23:16,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:23:16,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:23:16,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:23:16,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:23:16,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:23:16,926 INFO L87 Difference]: Start difference. First operand 58496 states and 107130 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 22:23:18,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:20,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:23:26,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:23:26,128 INFO L93 Difference]: Finished difference Result 112558 states and 211857 transitions. [2021-11-12 22:23:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:23:26,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 171 [2021-11-12 22:23:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:23:26,497 INFO L225 Difference]: With dead ends: 112558 [2021-11-12 22:23:26,497 INFO L226 Difference]: Without dead ends: 54080 [2021-11-12 22:23:27,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:23:27,435 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 770 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4610.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4715.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:23:27,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 2165 Invalid, 485 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [19 Valid, 464 Invalid, 2 Unknown, 0 Unchecked, 4715.88ms Time] [2021-11-12 22:23:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54080 states.