./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.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_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/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_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/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_d6770078-7d9e-414d-a089-aea7c03e7326/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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:50:18,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:50:18,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:50:18,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:50:18,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:50:18,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:50:18,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:50:18,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:50:18,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:50:18,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:50:18,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:50:18,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:50:18,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:50:18,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:50:18,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:50:18,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:50:18,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:50:18,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:50:18,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:50:18,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:50:18,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:50:18,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:50:18,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:50:18,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:50:18,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:50:18,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:50:18,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:50:18,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:50:18,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:50:18,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:50:18,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:50:18,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:50:18,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:50:18,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:50:18,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:50:18,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:50:18,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:50:18,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:50:18,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:50:18,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:50:18,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:50:18,580 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:50:18,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:50:18,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:50:18,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:50:18,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:50:18,609 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:50:18,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:50:18,610 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:50:18,610 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:50:18,610 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:50:18,610 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:50:18,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:50:18,611 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:50:18,611 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:50:18,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:50:18,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:50:18,611 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:50:18,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:50:18,612 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:50:18,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:50:18,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:50:18,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:50:18,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:50:18,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:50:18,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:50:18,614 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:50:18,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:50:18,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:50:18,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:50:18,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:50:18,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:50:18,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:50:18,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:50:18,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:50:18,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:50:18,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:50:18,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:50:18,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:50:18,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:50:18,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:50:18,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:50:18,617 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_d6770078-7d9e-414d-a089-aea7c03e7326/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-12 23:50:18,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:50:18,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:50:18,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:50:18,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:50:18,939 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:50:18,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-12 23:50:19,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/950227034/de2f59132fad4e58b7c3971413902777/FLAG70b280afa [2021-11-12 23:50:19,751 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:50:19,752 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-12 23:50:19,776 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/950227034/de2f59132fad4e58b7c3971413902777/FLAG70b280afa [2021-11-12 23:50:19,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/950227034/de2f59132fad4e58b7c3971413902777 [2021-11-12 23:50:19,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:50:19,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:50:19,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:19,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:50:19,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:50:19,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:19" (1/1) ... [2021-11-12 23:50:19,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@355f992c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:19, skipping insertion in model container [2021-11-12 23:50:19,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:19" (1/1) ... [2021-11-12 23:50:19,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:50:20,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:50:20,520 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_d6770078-7d9e-414d-a089-aea7c03e7326/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-12 23:50:20,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:20,681 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 23:50:20,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2cdb73d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:20, skipping insertion in model container [2021-11-12 23:50:20,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:20,682 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:50:20,684 INFO L158 Benchmark]: Toolchain (without parser) took 722.86ms. Allocated memory is still 117.4MB. Free memory was 87.0MB in the beginning and 77.7MB in the end (delta: 9.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:50:20,685 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 117.4MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:50:20,686 INFO L158 Benchmark]: CACSL2BoogieTranslator took 720.53ms. Allocated memory is still 117.4MB. Free memory was 86.8MB in the beginning and 77.7MB in the end (delta: 9.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:50:20,690 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 117.4MB. Free memory is still 74.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 720.53ms. Allocated memory is still 117.4MB. Free memory was 86.8MB in the beginning and 77.7MB in the end (delta: 9.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1668]: 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_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/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_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/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_d6770078-7d9e-414d-a089-aea7c03e7326/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 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:50:23,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:50:23,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:50:23,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:50:23,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:50:23,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:50:23,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:50:23,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:50:23,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:50:23,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:50:23,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:50:23,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:50:23,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:50:23,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:50:23,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:50:23,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:50:23,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:50:23,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:50:23,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:50:23,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:50:23,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:50:23,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:50:23,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:50:23,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:50:23,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:50:23,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:50:23,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:50:23,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:50:23,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:50:23,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:50:23,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:50:23,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:50:23,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:50:23,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:50:23,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:50:23,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:50:23,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:50:23,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:50:23,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:50:23,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:50:23,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:50:23,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:50:23,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:50:23,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:50:23,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:50:23,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:50:23,137 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:50:23,137 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:50:23,138 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:50:23,138 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:50:23,138 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:50:23,138 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:50:23,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:50:23,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:50:23,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:50:23,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:50:23,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:50:23,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:50:23,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:50:23,142 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:50:23,143 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:50:23,143 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:50:23,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:50:23,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:50:23,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:50:23,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:50:23,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:50:23,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:50:23,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:50:23,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:50:23,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:50:23,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:50:23,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:50:23,146 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:50:23,146 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:23,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:50:23,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:50:23,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:50:23,147 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_d6770078-7d9e-414d-a089-aea7c03e7326/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-12 23:50:23,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:50:23,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:50:23,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:50:23,578 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:50:23,582 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:50:23,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-12 23:50:23,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/1ead62893/cb5e925fbcf343faa3c9232018ddb4fb/FLAG53540c380 [2021-11-12 23:50:24,444 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:50:24,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-12 23:50:24,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/1ead62893/cb5e925fbcf343faa3c9232018ddb4fb/FLAG53540c380 [2021-11-12 23:50:24,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/data/1ead62893/cb5e925fbcf343faa3c9232018ddb4fb [2021-11-12 23:50:24,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:50:24,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:50:24,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:24,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:50:24,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:50:24,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:24" (1/1) ... [2021-11-12 23:50:24,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea7e6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:24, skipping insertion in model container [2021-11-12 23:50:24,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:50:24" (1/1) ... [2021-11-12 23:50:24,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:50:24,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:50:25,246 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_d6770078-7d9e-414d-a089-aea7c03e7326/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-12 23:50:25,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:25,344 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:50:25,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:50:25,431 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_d6770078-7d9e-414d-a089-aea7c03e7326/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-12 23:50:25,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:25,462 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:50:25,524 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_d6770078-7d9e-414d-a089-aea7c03e7326/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-12 23:50:25,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:50:25,576 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:50:25,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25 WrapperNode [2021-11-12 23:50:25,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:50:25,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:50:25,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:50:25,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:50:25,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:50:25,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:50:25,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:50:25,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:50:25,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:50:25,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:50:25,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:50:25,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:50:25,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (1/1) ... [2021-11-12 23:50:25,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:50:25,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:50:25,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:50:25,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:50:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:50:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:50:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-12 23:50:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-12 23:50:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:50:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:50:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:50:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:50:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:50:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:50:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:50:25,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:50:25,948 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:50:25,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:50:25,948 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:50:25,948 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:50:25,948 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:50:25,948 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:50:25,949 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:50:25,949 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:50:25,949 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:50:25,949 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:50:25,949 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:50:25,949 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:50:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:50:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:50:25,950 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:50:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:50:25,950 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:50:25,950 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:50:25,950 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:50:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:50:25,951 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:50:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:50:25,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:50:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:50:25,951 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:50:25,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:50:25,952 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:50:25,952 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:50:25,952 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:50:25,952 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:50:25,952 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:50:25,952 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:50:25,952 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:50:25,953 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:50:25,953 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:50:25,953 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:50:25,953 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:50:25,953 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:50:25,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:50:25,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:50:25,954 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:50:25,954 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:50:25,954 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 23:50:25,954 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 23:50:29,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:50:29,804 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:50:29,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:50:29 BoogieIcfgContainer [2021-11-12 23:50:29,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:50:29,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:50:29,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:50:29,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:50:29,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:50:24" (1/3) ... [2021-11-12 23:50:29,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4b7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:50:29, skipping insertion in model container [2021-11-12 23:50:29,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:50:25" (2/3) ... [2021-11-12 23:50:29,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4b7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:50:29, skipping insertion in model container [2021-11-12 23:50:29,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:50:29" (3/3) ... [2021-11-12 23:50:29,816 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2021-11-12 23:50:29,822 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:50:29,823 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:50:29,879 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:50:29,886 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 23:50:29,888 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:50:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 446 states have (on average 1.6816143497757847) internal successors, (750), 469 states have internal predecessors, (750), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-12 23:50:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:50:29,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:29,953 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] [2021-11-12 23:50:29,954 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:29,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1381610677, now seen corresponding path program 1 times [2021-11-12 23:50:29,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:29,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483164064] [2021-11-12 23:50:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:29,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:29,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:29,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:29,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:50:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:30,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:50:30,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:50:31,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:50:31,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:31,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483164064] [2021-11-12 23:50:31,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483164064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:31,237 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:31,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:50:31,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764801113] [2021-11-12 23:50:31,240 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:50:31,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:50:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:50:31,290 INFO L87 Difference]: Start difference. First operand has 576 states, 446 states have (on average 1.6816143497757847) internal successors, (750), 469 states have internal predecessors, (750), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:50:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:31,414 INFO L93 Difference]: Finished difference Result 597 states and 984 transitions. [2021-11-12 23:50:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:50:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-11-12 23:50:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:31,438 INFO L225 Difference]: With dead ends: 597 [2021-11-12 23:50:31,438 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:50:31,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:50:31,446 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:31,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 11.77ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:50:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:50:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 23:50:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 440 states have (on average 1.6795454545454545) internal successors, (739), 461 states have internal predecessors, (739), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 938 transitions. [2021-11-12 23:50:31,571 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 938 transitions. Word has length 83 [2021-11-12 23:50:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:31,572 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 938 transitions. [2021-11-12 23:50:31,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:50:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 938 transitions. [2021-11-12 23:50:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:50:31,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:31,580 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] [2021-11-12 23:50:31,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:31,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:31,801 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash 806951007, now seen corresponding path program 1 times [2021-11-12 23:50:31,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:31,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049412460] [2021-11-12 23:50:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:31,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:31,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:31,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:50:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:32,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:50:32,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:50:33,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:33,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049412460] [2021-11-12 23:50:33,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049412460] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:33,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:33,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:33,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702712205] [2021-11-12 23:50:33,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:33,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:33,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:33,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:33,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:33,018 INFO L87 Difference]: Start difference. First operand 568 states and 938 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:33,157 INFO L93 Difference]: Finished difference Result 1127 states and 1868 transitions. [2021-11-12 23:50:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:33,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-12 23:50:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:33,169 INFO L225 Difference]: With dead ends: 1127 [2021-11-12 23:50:33,169 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:50:33,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:33,181 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 14 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.24ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:33,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2765 Invalid, 35 Unknown, 0 Unchecked, 19.24ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 37.51ms Time] [2021-11-12 23:50:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:50:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 23:50:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 440 states have (on average 1.6772727272727272) internal successors, (738), 461 states have internal predecessors, (738), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 937 transitions. [2021-11-12 23:50:33,284 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 937 transitions. Word has length 85 [2021-11-12 23:50:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:33,287 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 937 transitions. [2021-11-12 23:50:33,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 937 transitions. [2021-11-12 23:50:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:50:33,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:33,300 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:33,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:33,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:33,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash 103183749, now seen corresponding path program 1 times [2021-11-12 23:50:33,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:33,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49840266] [2021-11-12 23:50:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:33,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:33,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:33,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:33,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:50:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:50:34,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:50:34,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:34,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49840266] [2021-11-12 23:50:34,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49840266] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:34,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:34,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:34,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117995575] [2021-11-12 23:50:34,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:34,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:34,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:34,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:34,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:34,641 INFO L87 Difference]: Start difference. First operand 568 states and 937 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:34,724 INFO L93 Difference]: Finished difference Result 1127 states and 1866 transitions. [2021-11-12 23:50:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-12 23:50:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:34,752 INFO L225 Difference]: With dead ends: 1127 [2021-11-12 23:50:34,752 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:50:34,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:34,755 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 12 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:34,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2765 Invalid, 33 Unknown, 0 Unchecked, 7.64ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 34.53ms Time] [2021-11-12 23:50:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:50:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 23:50:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 440 states have (on average 1.675) internal successors, (737), 461 states have internal predecessors, (737), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 936 transitions. [2021-11-12 23:50:34,787 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 936 transitions. Word has length 87 [2021-11-12 23:50:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:34,787 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 936 transitions. [2021-11-12 23:50:34,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 936 transitions. [2021-11-12 23:50:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:50:34,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:34,790 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:34,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:35,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:35,014 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -713435681, now seen corresponding path program 1 times [2021-11-12 23:50:35,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:35,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839098440] [2021-11-12 23:50:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:35,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:35,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:35,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:35,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:50:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:50:35,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:50:36,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:36,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839098440] [2021-11-12 23:50:36,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839098440] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:36,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:36,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:36,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621478510] [2021-11-12 23:50:36,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:36,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:36,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:36,051 INFO L87 Difference]: Start difference. First operand 568 states and 936 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:36,156 INFO L93 Difference]: Finished difference Result 1131 states and 1869 transitions. [2021-11-12 23:50:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:50:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-11-12 23:50:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:36,163 INFO L225 Difference]: With dead ends: 1131 [2021-11-12 23:50:36,163 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:50:36,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:36,168 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 13 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:36,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2765 Invalid, 35 Unknown, 0 Unchecked, 7.35ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 52.35ms Time] [2021-11-12 23:50:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:50:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 23:50:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 445 states have (on average 1.6674157303370787) internal successors, (742), 466 states have internal predecessors, (742), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 941 transitions. [2021-11-12 23:50:36,203 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 941 transitions. Word has length 89 [2021-11-12 23:50:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:36,204 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 941 transitions. [2021-11-12 23:50:36,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 941 transitions. [2021-11-12 23:50:36,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 23:50:36,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:36,206 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:36,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:36,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:36,422 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:36,423 INFO L85 PathProgramCache]: Analyzing trace with hash 691765280, now seen corresponding path program 1 times [2021-11-12 23:50:36,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:36,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101685478] [2021-11-12 23:50:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:36,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:36,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:36,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:50:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:50:37,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:50:37,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:37,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101685478] [2021-11-12 23:50:37,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101685478] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:37,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:37,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:37,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753647198] [2021-11-12 23:50:37,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:37,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:37,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:37,433 INFO L87 Difference]: Start difference. First operand 574 states and 941 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:37,508 INFO L93 Difference]: Finished difference Result 1130 states and 1860 transitions. [2021-11-12 23:50:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-11-12 23:50:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:37,515 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 23:50:37,515 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:50:37,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:37,523 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 8 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.79ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:37,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2766 Invalid, 30 Unknown, 0 Unchecked, 5.79ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 30.37ms Time] [2021-11-12 23:50:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:50:37,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 23:50:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 445 states have (on average 1.6651685393258426) internal successors, (741), 466 states have internal predecessors, (741), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 940 transitions. [2021-11-12 23:50:37,553 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 940 transitions. Word has length 90 [2021-11-12 23:50:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:37,553 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 940 transitions. [2021-11-12 23:50:37,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 940 transitions. [2021-11-12 23:50:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 23:50:37,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:37,556 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:37,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:37,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:37,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:37,777 INFO L85 PathProgramCache]: Analyzing trace with hash 476563715, now seen corresponding path program 1 times [2021-11-12 23:50:37,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:37,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468047796] [2021-11-12 23:50:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:37,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:37,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:37,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:37,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:50:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:50:38,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:50:38,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:38,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468047796] [2021-11-12 23:50:38,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468047796] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:38,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:38,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:38,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168401490] [2021-11-12 23:50:38,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:38,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:38,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:38,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:38,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:38,787 INFO L87 Difference]: Start difference. First operand 574 states and 940 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:38,860 INFO L93 Difference]: Finished difference Result 1130 states and 1859 transitions. [2021-11-12 23:50:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:38,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2021-11-12 23:50:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:38,869 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 23:50:38,869 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:50:38,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:38,876 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 6 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:38,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2766 Invalid, 28 Unknown, 0 Unchecked, 5.77ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 28.53ms Time] [2021-11-12 23:50:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:50:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 23:50:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 445 states have (on average 1.6629213483146068) internal successors, (740), 466 states have internal predecessors, (740), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 939 transitions. [2021-11-12 23:50:38,910 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 939 transitions. Word has length 91 [2021-11-12 23:50:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:38,911 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 939 transitions. [2021-11-12 23:50:38,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 939 transitions. [2021-11-12 23:50:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:50:38,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:38,914 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:38,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:39,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:39,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:39,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1568491396, now seen corresponding path program 1 times [2021-11-12 23:50:39,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:39,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317963161] [2021-11-12 23:50:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:39,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:39,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:39,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:39,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:50:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:39,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:39,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:39,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:40,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:40,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317963161] [2021-11-12 23:50:40,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317963161] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:40,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:40,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:50:40,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248647761] [2021-11-12 23:50:40,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:40,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:50:40,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:50:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:50:40,279 INFO L87 Difference]: Start difference. First operand 574 states and 939 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:40,506 INFO L93 Difference]: Finished difference Result 1147 states and 1887 transitions. [2021-11-12 23:50:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:50:40,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-12 23:50:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:40,513 INFO L225 Difference]: With dead ends: 1147 [2021-11-12 23:50:40,514 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 23:50:40,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 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 23:50:40,518 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 148 mSDsluCounter, 4508 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5431 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.94ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:40,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5431 Invalid, 85 Unknown, 0 Unchecked, 12.86ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 158.94ms Time] [2021-11-12 23:50:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 23:50:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2021-11-12 23:50:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 461 states have (on average 1.6616052060737527) internal successors, (766), 484 states have internal predecessors, (766), 103 states have call successors, (103), 27 states have call predecessors, (103), 28 states have return successors, (101), 95 states have call predecessors, (101), 98 states have call successors, (101) [2021-11-12 23:50:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 970 transitions. [2021-11-12 23:50:40,548 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 970 transitions. Word has length 92 [2021-11-12 23:50:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:40,548 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 970 transitions. [2021-11-12 23:50:40,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 970 transitions. [2021-11-12 23:50:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 23:50:40,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:40,551 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:40,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:40,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:40,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1859423675, now seen corresponding path program 1 times [2021-11-12 23:50:40,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:40,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917316718] [2021-11-12 23:50:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:40,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:40,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:40,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:40,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:50:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 23:50:41,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 23:50:41,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:41,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917316718] [2021-11-12 23:50:41,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917316718] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:41,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:41,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:50:41,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202034353] [2021-11-12 23:50:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:41,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:41,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:50:41,831 INFO L87 Difference]: Start difference. First operand 593 states and 970 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:41,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:41,914 INFO L93 Difference]: Finished difference Result 1160 states and 1909 transitions. [2021-11-12 23:50:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:50:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2021-11-12 23:50:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:41,921 INFO L225 Difference]: With dead ends: 1160 [2021-11-12 23:50:41,922 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 23:50:41,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 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 23:50:41,926 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 8 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:41,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2765 Invalid, 30 Unknown, 0 Unchecked, 5.16ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 39.19ms Time] [2021-11-12 23:50:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 23:50:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 23:50:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6623093681917211) internal successors, (763), 481 states have internal predecessors, (763), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-12 23:50:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 963 transitions. [2021-11-12 23:50:41,955 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 963 transitions. Word has length 92 [2021-11-12 23:50:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:41,955 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 963 transitions. [2021-11-12 23:50:41,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 963 transitions. [2021-11-12 23:50:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 23:50:41,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:41,958 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:41,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:42,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:42,173 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:42,173 INFO L85 PathProgramCache]: Analyzing trace with hash 890801676, now seen corresponding path program 1 times [2021-11-12 23:50:42,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:42,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516381455] [2021-11-12 23:50:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:42,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:42,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:42,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:42,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:50:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:42,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:42,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:50:43,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:43,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516381455] [2021-11-12 23:50:43,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516381455] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:43,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:43,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:43,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639620881] [2021-11-12 23:50:43,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:43,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:43,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:43,136 INFO L87 Difference]: Start difference. First operand 589 states and 963 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:43,356 INFO L93 Difference]: Finished difference Result 1186 states and 1954 transitions. [2021-11-12 23:50:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-12 23:50:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:43,369 INFO L225 Difference]: With dead ends: 1186 [2021-11-12 23:50:43,369 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 23:50:43,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:43,374 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 134 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.50ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:43,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2573 Invalid, 131 Unknown, 0 Unchecked, 10.50ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 167.99ms Time] [2021-11-12 23:50:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 23:50:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 23:50:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6514161220043573) internal successors, (758), 481 states have internal predecessors, (758), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-12 23:50:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 958 transitions. [2021-11-12 23:50:43,399 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 958 transitions. Word has length 93 [2021-11-12 23:50:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:43,400 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 958 transitions. [2021-11-12 23:50:43,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 958 transitions. [2021-11-12 23:50:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 23:50:43,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:43,402 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:43,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:43,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:43,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1117985264, now seen corresponding path program 1 times [2021-11-12 23:50:43,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:43,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285191916] [2021-11-12 23:50:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:43,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:43,620 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:43,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:50:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:44,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:44,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:44,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:50:44,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:44,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285191916] [2021-11-12 23:50:44,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285191916] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:44,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:44,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:44,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783844248] [2021-11-12 23:50:44,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:44,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:44,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:44,661 INFO L87 Difference]: Start difference. First operand 589 states and 958 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:44,846 INFO L93 Difference]: Finished difference Result 1186 states and 1944 transitions. [2021-11-12 23:50:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2021-11-12 23:50:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:44,853 INFO L225 Difference]: With dead ends: 1186 [2021-11-12 23:50:44,854 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 23:50:44,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:44,858 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 128 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.76ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:44,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2573 Invalid, 121 Unknown, 0 Unchecked, 8.76ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 134.93ms Time] [2021-11-12 23:50:44,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 23:50:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 23:50:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6405228758169934) internal successors, (753), 481 states have internal predecessors, (753), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-12 23:50:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 953 transitions. [2021-11-12 23:50:44,890 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 953 transitions. Word has length 95 [2021-11-12 23:50:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:44,890 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 953 transitions. [2021-11-12 23:50:44,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 953 transitions. [2021-11-12 23:50:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:50:44,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:44,894 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:44,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:45,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:45,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:45,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1819505812, now seen corresponding path program 1 times [2021-11-12 23:50:45,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:45,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844441769] [2021-11-12 23:50:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:45,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:45,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:45,116 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:45,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:50:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:45,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:50:46,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:46,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844441769] [2021-11-12 23:50:46,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844441769] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:46,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:46,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:46,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69001911] [2021-11-12 23:50:46,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:46,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:46,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:46,113 INFO L87 Difference]: Start difference. First operand 589 states and 953 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:46,311 INFO L93 Difference]: Finished difference Result 1207 states and 1965 transitions. [2021-11-12 23:50:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:50:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-12 23:50:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:46,319 INFO L225 Difference]: With dead ends: 1207 [2021-11-12 23:50:46,319 INFO L226 Difference]: Without dead ends: 619 [2021-11-12 23:50:46,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:46,323 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 143 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.37ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:46,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2583 Invalid, 131 Unknown, 0 Unchecked, 5.37ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 159.45ms Time] [2021-11-12 23:50:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-12 23:50:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 604. [2021-11-12 23:50:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 474 states have (on average 1.620253164556962) internal successors, (768), 495 states have internal predecessors, (768), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 967 transitions. [2021-11-12 23:50:46,347 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 967 transitions. Word has length 97 [2021-11-12 23:50:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:46,348 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 967 transitions. [2021-11-12 23:50:46,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 967 transitions. [2021-11-12 23:50:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:50:46,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:46,350 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:46,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:46,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:46,571 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:46,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1943380244, now seen corresponding path program 1 times [2021-11-12 23:50:46,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:46,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982533693] [2021-11-12 23:50:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:46,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:46,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:46,573 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:46,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:50:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:47,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:47,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:47,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982533693] [2021-11-12 23:50:47,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982533693] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:47,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:47,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:50:47,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406305768] [2021-11-12 23:50:47,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:47,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:50:47,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:50:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:50:47,640 INFO L87 Difference]: Start difference. First operand 604 states and 967 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:47,822 INFO L93 Difference]: Finished difference Result 1171 states and 1886 transitions. [2021-11-12 23:50:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:50:47,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-12 23:50:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:47,829 INFO L225 Difference]: With dead ends: 1171 [2021-11-12 23:50:47,829 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 23:50:47,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:50:47,834 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 131 mSDsluCounter, 4473 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5399 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:47,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5399 Invalid, 75 Unknown, 0 Unchecked, 9.31ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 118.63ms Time] [2021-11-12 23:50:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 23:50:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 583. [2021-11-12 23:50:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 453 states have (on average 1.6136865342163356) internal successors, (731), 474 states have internal predecessors, (731), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 930 transitions. [2021-11-12 23:50:47,859 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 930 transitions. Word has length 97 [2021-11-12 23:50:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:47,861 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 930 transitions. [2021-11-12 23:50:47,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 930 transitions. [2021-11-12 23:50:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:50:47,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:47,864 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:47,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:48,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:48,084 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 886108033, now seen corresponding path program 1 times [2021-11-12 23:50:48,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:48,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954107336] [2021-11-12 23:50:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:48,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:48,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:48,086 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:48,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:50:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:48,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:50:49,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:49,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954107336] [2021-11-12 23:50:49,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954107336] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:49,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:49,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:49,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627656721] [2021-11-12 23:50:49,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:49,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:49,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:49,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:49,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:49,135 INFO L87 Difference]: Start difference. First operand 583 states and 930 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:49,273 INFO L93 Difference]: Finished difference Result 1135 states and 1824 transitions. [2021-11-12 23:50:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2021-11-12 23:50:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:49,280 INFO L225 Difference]: With dead ends: 1135 [2021-11-12 23:50:49,281 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 23:50:49,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:49,285 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 69 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:49,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2597 Invalid, 54 Unknown, 0 Unchecked, 4.32ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 103.43ms Time] [2021-11-12 23:50:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 23:50:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 23:50:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 453 states have (on average 1.6114790286975718) internal successors, (730), 474 states have internal predecessors, (730), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 929 transitions. [2021-11-12 23:50:49,311 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 929 transitions. Word has length 98 [2021-11-12 23:50:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:49,312 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 929 transitions. [2021-11-12 23:50:49,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 929 transitions. [2021-11-12 23:50:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:50:49,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:49,315 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:49,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:49,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:49,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash -663031513, now seen corresponding path program 1 times [2021-11-12 23:50:49,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:49,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821153131] [2021-11-12 23:50:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:49,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:49,539 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:49,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:50:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:50,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:50:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:50,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 23:50:50,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:50,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821153131] [2021-11-12 23:50:50,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821153131] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:50,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:50,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:50:50,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740843226] [2021-11-12 23:50:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:50,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:50:50,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:50:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:50:50,658 INFO L87 Difference]: Start difference. First operand 583 states and 929 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:50,795 INFO L93 Difference]: Finished difference Result 1135 states and 1823 transitions. [2021-11-12 23:50:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:50:50,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-12 23:50:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:50,803 INFO L225 Difference]: With dead ends: 1135 [2021-11-12 23:50:50,803 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 23:50:50,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:50:50,808 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 67 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:50,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2597 Invalid, 52 Unknown, 0 Unchecked, 5.12ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 99.57ms Time] [2021-11-12 23:50:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 23:50:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 23:50:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 453 states have (on average 1.609271523178808) internal successors, (729), 474 states have internal predecessors, (729), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 928 transitions. [2021-11-12 23:50:50,837 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 928 transitions. Word has length 99 [2021-11-12 23:50:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:50,838 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 928 transitions. [2021-11-12 23:50:50,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:50:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 928 transitions. [2021-11-12 23:50:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:50:50,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:50,841 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:50,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 23:50:51,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:51,054 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash -965540004, now seen corresponding path program 1 times [2021-11-12 23:50:51,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:51,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613972667] [2021-11-12 23:50:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:51,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:51,058 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:51,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:50:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:50:51,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:51,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:52,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:52,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613972667] [2021-11-12 23:50:52,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613972667] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:52,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:52,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:50:52,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651856484] [2021-11-12 23:50:52,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:52,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:50:52,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:52,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:50:52,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:50:52,449 INFO L87 Difference]: Start difference. First operand 583 states and 928 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:52,720 INFO L93 Difference]: Finished difference Result 1140 states and 1830 transitions. [2021-11-12 23:50:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:50:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-12 23:50:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:52,727 INFO L225 Difference]: With dead ends: 1140 [2021-11-12 23:50:52,727 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 23:50:52,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:50:52,732 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 109 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6026 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.33ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:52,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6026 Invalid, 152 Unknown, 0 Unchecked, 9.33ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 198.71ms Time] [2021-11-12 23:50:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 23:50:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 585. [2021-11-12 23:50:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.6043956043956045) internal successors, (730), 476 states have internal predecessors, (730), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 929 transitions. [2021-11-12 23:50:52,754 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 929 transitions. Word has length 100 [2021-11-12 23:50:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:52,755 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 929 transitions. [2021-11-12 23:50:52,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 929 transitions. [2021-11-12 23:50:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:50:52,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:52,757 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:52,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:52,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:52,978 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:52,978 INFO L85 PathProgramCache]: Analyzing trace with hash 581923858, now seen corresponding path program 1 times [2021-11-12 23:50:52,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:52,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725064814] [2021-11-12 23:50:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:52,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:52,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:52,981 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:52,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:50:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:50:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:50:53,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:54,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:54,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725064814] [2021-11-12 23:50:54,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725064814] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:50:54,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:50:54,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:50:54,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148104824] [2021-11-12 23:50:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:54,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:50:54,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:54,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:50:54,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:50:54,186 INFO L87 Difference]: Start difference. First operand 585 states and 929 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:54,406 INFO L93 Difference]: Finished difference Result 1132 states and 1811 transitions. [2021-11-12 23:50:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:50:54,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-12 23:50:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:54,413 INFO L225 Difference]: With dead ends: 1132 [2021-11-12 23:50:54,413 INFO L226 Difference]: Without dead ends: 590 [2021-11-12 23:50:54,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 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 23:50:54,417 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 77 mSDsluCounter, 5162 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6034 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:54,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6034 Invalid, 152 Unknown, 0 Unchecked, 7.31ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 148.00ms Time] [2021-11-12 23:50:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-12 23:50:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 587. [2021-11-12 23:50:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 457 states have (on average 1.599562363238512) internal successors, (731), 478 states have internal predecessors, (731), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 930 transitions. [2021-11-12 23:50:54,442 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 930 transitions. Word has length 101 [2021-11-12 23:50:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:54,442 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 930 transitions. [2021-11-12 23:50:54,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:50:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 930 transitions. [2021-11-12 23:50:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:50:54,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:54,445 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:54,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:54,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:54,666 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash 27937254, now seen corresponding path program 1 times [2021-11-12 23:50:54,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:54,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899907827] [2021-11-12 23:50:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:54,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:54,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:54,668 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:54,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:50:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:55,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:55,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:55,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899907827] [2021-11-12 23:50:55,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899907827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:55,742 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:55,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:50:55,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297975847] [2021-11-12 23:50:55,743 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:55,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:50:55,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:50:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:50:55,745 INFO L87 Difference]: Start difference. First operand 587 states and 930 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:50:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:55,958 INFO L93 Difference]: Finished difference Result 1078 states and 1738 transitions. [2021-11-12 23:50:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:50:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-12 23:50:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:55,965 INFO L225 Difference]: With dead ends: 1078 [2021-11-12 23:50:55,965 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 23:50:55,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 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 23:50:55,970 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 55 mSDsluCounter, 6068 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6952 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.93ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:55,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 6952 Invalid, 101 Unknown, 0 Unchecked, 11.93ms Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 157.40ms Time] [2021-11-12 23:50:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 23:50:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-12 23:50:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 450 states have (on average 1.6066666666666667) internal successors, (723), 471 states have internal predecessors, (723), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 922 transitions. [2021-11-12 23:50:55,993 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 922 transitions. Word has length 102 [2021-11-12 23:50:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:55,994 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 922 transitions. [2021-11-12 23:50:55,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:50:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 922 transitions. [2021-11-12 23:50:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:50:55,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:55,997 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:56,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:56,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:56,210 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:56,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2098890538, now seen corresponding path program 1 times [2021-11-12 23:50:56,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:56,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416922341] [2021-11-12 23:50:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:56,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:56,212 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:56,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:50:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:56,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:56,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:57,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:57,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416922341] [2021-11-12 23:50:57,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416922341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:57,286 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:57,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:50:57,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855689768] [2021-11-12 23:50:57,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:57,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:50:57,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:50:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:50:57,288 INFO L87 Difference]: Start difference. First operand 580 states and 922 transitions. Second operand has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:50:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:57,414 INFO L93 Difference]: Finished difference Result 1083 states and 1752 transitions. [2021-11-12 23:50:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:50:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-12 23:50:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:57,420 INFO L225 Difference]: With dead ends: 1083 [2021-11-12 23:50:57,421 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 23:50:57,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 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 23:50:57,424 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 170 mSDsluCounter, 4362 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 5238 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:57,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 5238 Invalid, 79 Unknown, 0 Unchecked, 5.43ms Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 86.47ms Time] [2021-11-12 23:50:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 23:50:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 23:50:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 447 states have (on average 1.6062639821029083) internal successors, (718), 468 states have internal predecessors, (718), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 917 transitions. [2021-11-12 23:50:57,472 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 917 transitions. Word has length 103 [2021-11-12 23:50:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:57,473 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 917 transitions. [2021-11-12 23:50:57,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:50:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 917 transitions. [2021-11-12 23:50:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:50:57,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:57,475 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:57,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:57,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:57,676 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2018293078, now seen corresponding path program 1 times [2021-11-12 23:50:57,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:57,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365366499] [2021-11-12 23:50:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:57,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:57,678 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:57,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:50:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:50:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:58,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:50:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:58,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:58,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365366499] [2021-11-12 23:50:58,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365366499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:50:58,706 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:50:58,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:50:58,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855923787] [2021-11-12 23:50:58,706 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:50:58,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:50:58,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:50:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:50:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:50:58,707 INFO L87 Difference]: Start difference. First operand 577 states and 917 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:50:58,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:50:58,876 INFO L93 Difference]: Finished difference Result 1080 states and 1747 transitions. [2021-11-12 23:50:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:50:58,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2021-11-12 23:50:58,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:50:58,883 INFO L225 Difference]: With dead ends: 1080 [2021-11-12 23:50:58,883 INFO L226 Difference]: Without dead ends: 569 [2021-11-12 23:50:58,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:50:58,887 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 105 mSDsluCounter, 5145 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6020 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:50:58,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6020 Invalid, 73 Unknown, 0 Unchecked, 6.43ms Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 125.61ms Time] [2021-11-12 23:50:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-12 23:50:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-12 23:50:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 439 states have (on average 1.6104783599088839) internal successors, (707), 460 states have internal predecessors, (707), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:50:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 906 transitions. [2021-11-12 23:50:58,909 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 906 transitions. Word has length 103 [2021-11-12 23:50:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:50:58,909 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 906 transitions. [2021-11-12 23:50:58,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:50:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 906 transitions. [2021-11-12 23:50:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:50:58,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:50:58,912 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:50:58,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:50:59,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:50:59,132 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:50:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:50:59,132 INFO L85 PathProgramCache]: Analyzing trace with hash -408190454, now seen corresponding path program 1 times [2021-11-12 23:50:59,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:50:59,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613720919] [2021-11-12 23:50:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:59,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:50:59,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:50:59,135 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:50:59,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:50:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:50:59,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:50:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:50:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:50:59,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:51:00,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:00,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613720919] [2021-11-12 23:51:00,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613720919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:00,361 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:00,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:00,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492798829] [2021-11-12 23:51:00,361 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:00,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:00,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:00,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:00,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:00,363 INFO L87 Difference]: Start difference. First operand 569 states and 906 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, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:00,538 INFO L93 Difference]: Finished difference Result 1066 states and 1725 transitions. [2021-11-12 23:51:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:51:00,539 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, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-12 23:51:00,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:00,544 INFO L225 Difference]: With dead ends: 1066 [2021-11-12 23:51:00,544 INFO L226 Difference]: Without dead ends: 569 [2021-11-12 23:51:00,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 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 23:51:00,547 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 101 mSDsluCounter, 6008 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6879 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:00,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6879 Invalid, 127 Unknown, 0 Unchecked, 6.26ms Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 123.91ms Time] [2021-11-12 23:51:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-12 23:51:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-12 23:51:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 439 states have (on average 1.6082004555808656) internal successors, (706), 460 states have internal predecessors, (706), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:51:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 905 transitions. [2021-11-12 23:51:00,567 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 905 transitions. Word has length 104 [2021-11-12 23:51:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:00,567 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 905 transitions. [2021-11-12 23:51:00,567 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, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 905 transitions. [2021-11-12 23:51:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:51:00,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:00,569 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] [2021-11-12 23:51:00,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:00,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:00,786 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash 421063636, now seen corresponding path program 1 times [2021-11-12 23:51:00,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:00,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612228839] [2021-11-12 23:51:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:00,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:00,789 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:00,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:51:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:01,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:51:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:51:01,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:51:01,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:01,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612228839] [2021-11-12 23:51:01,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612228839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:01,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:01,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434970425] [2021-11-12 23:51:01,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:01,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:01,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:01,981 INFO L87 Difference]: Start difference. First operand 569 states and 905 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:02,168 INFO L93 Difference]: Finished difference Result 1110 states and 1782 transitions. [2021-11-12 23:51:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:51:02,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 105 [2021-11-12 23:51:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:02,175 INFO L225 Difference]: With dead ends: 1110 [2021-11-12 23:51:02,175 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:51:02,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 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 23:51:02,178 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 143 mSDsluCounter, 6808 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 7667 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.34ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:02,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 7667 Invalid, 134 Unknown, 0 Unchecked, 5.34ms Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 129.50ms Time] [2021-11-12 23:51:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:51:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:51:02,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 436 states have (on average 1.6009174311926606) internal successors, (698), 457 states have internal predecessors, (698), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:51:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 897 transitions. [2021-11-12 23:51:02,198 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 897 transitions. Word has length 105 [2021-11-12 23:51:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:02,199 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 897 transitions. [2021-11-12 23:51:02,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 897 transitions. [2021-11-12 23:51:02,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:51:02,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:02,201 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:51:02,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:02,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:02,414 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1885346545, now seen corresponding path program 1 times [2021-11-12 23:51:02,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:02,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124568244] [2021-11-12 23:51:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:02,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:02,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:02,417 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:02,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:51:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:51:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:51:03,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:51:03,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:03,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124568244] [2021-11-12 23:51:03,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124568244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:03,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:03,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:03,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397698438] [2021-11-12 23:51:03,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:03,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:03,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:03,513 INFO L87 Difference]: Start difference. First operand 566 states and 897 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:03,744 INFO L93 Difference]: Finished difference Result 1057 states and 1705 transitions. [2021-11-12 23:51:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:51:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 106 [2021-11-12 23:51:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:03,753 INFO L225 Difference]: With dead ends: 1057 [2021-11-12 23:51:03,753 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:51:03,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 201 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 23:51:03,757 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 51 mSDsluCounter, 7655 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8515 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 146.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:03,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 8515 Invalid, 150 Unknown, 0 Unchecked, 32.51ms Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 146.54ms Time] [2021-11-12 23:51:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:51:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:51:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 436 states have (on average 1.598623853211009) internal successors, (697), 457 states have internal predecessors, (697), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:51:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 896 transitions. [2021-11-12 23:51:03,780 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 896 transitions. Word has length 106 [2021-11-12 23:51:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:03,781 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 896 transitions. [2021-11-12 23:51:03,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 896 transitions. [2021-11-12 23:51:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:51:03,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:03,783 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:51:03,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:03,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:03,998 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1223713179, now seen corresponding path program 1 times [2021-11-12 23:51:03,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:03,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932736261] [2021-11-12 23:51:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:03,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:03,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:04,000 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:04,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:51:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:51:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:51:04,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:51:05,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:05,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932736261] [2021-11-12 23:51:05,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932736261] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:05,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:05,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:05,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561177513] [2021-11-12 23:51:05,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:05,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:05,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:05,197 INFO L87 Difference]: Start difference. First operand 566 states and 896 transitions. Second operand has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:05,397 INFO L93 Difference]: Finished difference Result 1095 states and 1750 transitions. [2021-11-12 23:51:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:51:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 107 [2021-11-12 23:51:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:05,403 INFO L225 Difference]: With dead ends: 1095 [2021-11-12 23:51:05,404 INFO L226 Difference]: Without dead ends: 563 [2021-11-12 23:51:05,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 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 23:51:05,407 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 76 mSDsluCounter, 7638 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 8496 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:05,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 8496 Invalid, 142 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 136.33ms Time] [2021-11-12 23:51:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-12 23:51:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-12 23:51:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 433 states have (on average 1.5912240184757507) internal successors, (689), 454 states have internal predecessors, (689), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-12 23:51:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 888 transitions. [2021-11-12 23:51:05,426 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 888 transitions. Word has length 107 [2021-11-12 23:51:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:05,427 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 888 transitions. [2021-11-12 23:51:05,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:51:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 888 transitions. [2021-11-12 23:51:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:51:05,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:05,429 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] [2021-11-12 23:51:05,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:05,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:05,648 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1018685140, now seen corresponding path program 1 times [2021-11-12 23:51:05,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:05,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976275755] [2021-11-12 23:51:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:05,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:05,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:05,650 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:51:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:06,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:51:06,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:51:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:51:07,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:07,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976275755] [2021-11-12 23:51:07,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976275755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:07,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:07,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 23:51:07,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212902438] [2021-11-12 23:51:07,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:07,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:51:07,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:51:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:51:07,376 INFO L87 Difference]: Start difference. First operand 563 states and 888 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 23:51:09,410 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 23:51:11,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:13,421 WARN L515 Checker$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 23:51:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:21,909 INFO L93 Difference]: Finished difference Result 2713 states and 4483 transitions. [2021-11-12 23:51:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:51:21,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 108 [2021-11-12 23:51:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:21,928 INFO L225 Difference]: With dead ends: 2713 [2021-11-12 23:51:21,928 INFO L226 Difference]: Without dead ends: 2230 [2021-11-12 23:51:21,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:51:21,932 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 4998 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 4494 mSolverCounterSat, 1359 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13074.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5182 SdHoareTripleChecker+Valid, 3359 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.15ms SdHoareTripleChecker+Time, 1359 IncrementalHoareTripleChecker+Valid, 4494 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14158.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:21,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5182 Valid, 3359 Invalid, 5856 Unknown, 0 Unchecked, 48.15ms Time], IncrementalHoareTripleChecker [1359 Valid, 4494 Invalid, 3 Unknown, 0 Unchecked, 14158.44ms Time] [2021-11-12 23:51:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-11-12 23:51:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2048. [2021-11-12 23:51:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 1565 states have (on average 1.6492012779552716) internal successors, (2581), 1630 states have internal predecessors, (2581), 398 states have call successors, (398), 81 states have call predecessors, (398), 84 states have return successors, (406), 363 states have call predecessors, (406), 393 states have call successors, (406) [2021-11-12 23:51:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3385 transitions. [2021-11-12 23:51:22,087 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3385 transitions. Word has length 108 [2021-11-12 23:51:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:22,088 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 3385 transitions. [2021-11-12 23:51:22,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-12 23:51:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3385 transitions. [2021-11-12 23:51:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:51:22,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:22,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:51:22,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:22,310 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:22,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1628897051, now seen corresponding path program 1 times [2021-11-12 23:51:22,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:22,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407482715] [2021-11-12 23:51:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:22,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:22,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:22,312 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:22,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:51:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:51:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:51:23,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:51:23,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:23,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407482715] [2021-11-12 23:51:23,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407482715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:51:23,872 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:51:23,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:51:23,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558589452] [2021-11-12 23:51:23,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:23,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:51:23,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:51:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:51:23,873 INFO L87 Difference]: Start difference. First operand 2048 states and 3385 transitions. Second operand has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-12 23:51:25,892 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:27,910 WARN L515 Checker$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 23:51:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:37,081 INFO L93 Difference]: Finished difference Result 5415 states and 8990 transitions. [2021-11-12 23:51:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 23:51:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 160 [2021-11-12 23:51:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:37,113 INFO L225 Difference]: With dead ends: 5415 [2021-11-12 23:51:37,114 INFO L226 Difference]: Without dead ends: 3447 [2021-11-12 23:51:37,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 23:51:37,129 INFO L933 BasicCegarLoop]: 1784 mSDtfsCounter, 3927 mSDsluCounter, 3424 mSDsCounter, 0 mSdLazyCounter, 7754 mSolverCounterSat, 1641 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11456.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4017 SdHoareTripleChecker+Valid, 5208 SdHoareTripleChecker+Invalid, 9397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.03ms SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 7754 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12605.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:37,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4017 Valid, 5208 Invalid, 9397 Unknown, 0 Unchecked, 49.03ms Time], IncrementalHoareTripleChecker [1641 Valid, 7754 Invalid, 2 Unknown, 0 Unchecked, 12605.07ms Time] [2021-11-12 23:51:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-11-12 23:51:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2981. [2021-11-12 23:51:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2226 states have (on average 1.6127583108715184) internal successors, (3590), 2317 states have internal predecessors, (3590), 624 states have call successors, (624), 114 states have call predecessors, (624), 130 states have return successors, (660), 582 states have call predecessors, (660), 619 states have call successors, (660) [2021-11-12 23:51:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4874 transitions. [2021-11-12 23:51:37,386 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4874 transitions. Word has length 160 [2021-11-12 23:51:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:37,387 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 4874 transitions. [2021-11-12 23:51:37,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-12 23:51:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4874 transitions. [2021-11-12 23:51:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 23:51:37,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:37,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:51:37,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:37,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:37,618 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:37,618 INFO L85 PathProgramCache]: Analyzing trace with hash 594199647, now seen corresponding path program 1 times [2021-11-12 23:51:37,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:37,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273462953] [2021-11-12 23:51:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:37,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:37,621 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:37,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:51:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:38,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:39,224 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:39,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273462953] [2021-11-12 23:51:39,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273462953] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:51:39,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:51:39,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:51:39,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972404594] [2021-11-12 23:51:39,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:39,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:51:39,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:51:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:51:39,229 INFO L87 Difference]: Start difference. First operand 2981 states and 4874 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:51:41,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:43,265 WARN L515 Checker$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 23:51:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:44,056 INFO L93 Difference]: Finished difference Result 5922 states and 9889 transitions. [2021-11-12 23:51:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:51:44,057 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 161 [2021-11-12 23:51:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:44,082 INFO L225 Difference]: With dead ends: 5922 [2021-11-12 23:51:44,082 INFO L226 Difference]: Without dead ends: 3021 [2021-11-12 23:51:44,101 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 23:51:44,101 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 792 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4581.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.16ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4701.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:44,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 2166 Invalid, 461 Unknown, 0 Unchecked, 4.16ms Time], IncrementalHoareTripleChecker [16 Valid, 443 Invalid, 2 Unknown, 0 Unchecked, 4701.52ms Time] [2021-11-12 23:51:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-12 23:51:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 3021. [2021-11-12 23:51:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2256 states have (on average 1.6046099290780143) internal successors, (3620), 2347 states have internal predecessors, (3620), 624 states have call successors, (624), 124 states have call predecessors, (624), 140 states have return successors, (666), 582 states have call predecessors, (666), 619 states have call successors, (666) [2021-11-12 23:51:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 4910 transitions. [2021-11-12 23:51:44,304 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 4910 transitions. Word has length 161 [2021-11-12 23:51:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:44,304 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 4910 transitions. [2021-11-12 23:51:44,305 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:51:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 4910 transitions. [2021-11-12 23:51:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:51:44,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:44,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:51:44,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:44,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:44,532 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1903542457, now seen corresponding path program 1 times [2021-11-12 23:51:44,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:44,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332717623] [2021-11-12 23:51:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:44,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:44,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:44,534 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:44,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:51:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:45,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:46,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:46,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332717623] [2021-11-12 23:51:46,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332717623] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:51:46,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:51:46,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:51:46,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105979264] [2021-11-12 23:51:46,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:46,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:51:46,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:51:46,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:51:46,046 INFO L87 Difference]: Start difference. First operand 3021 states and 4910 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:51:48,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:50,072 WARN L515 Checker$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 23:51:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:51,063 INFO L93 Difference]: Finished difference Result 6012 states and 9961 transitions. [2021-11-12 23:51:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:51:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 163 [2021-11-12 23:51:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:51,081 INFO L225 Difference]: With dead ends: 6012 [2021-11-12 23:51:51,081 INFO L226 Difference]: Without dead ends: 3071 [2021-11-12 23:51:51,088 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 23:51:51,089 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 780 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4715.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.56ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4835.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:51,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 2167 Invalid, 463 Unknown, 0 Unchecked, 5.56ms Time], IncrementalHoareTripleChecker [14 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 4835.30ms Time] [2021-11-12 23:51:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-11-12 23:51:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3071. [2021-11-12 23:51:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 2296 states have (on average 1.5940766550522647) internal successors, (3660), 2387 states have internal predecessors, (3660), 624 states have call successors, (624), 134 states have call predecessors, (624), 150 states have return successors, (672), 582 states have call predecessors, (672), 619 states have call successors, (672) [2021-11-12 23:51:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 4956 transitions. [2021-11-12 23:51:51,235 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 4956 transitions. Word has length 163 [2021-11-12 23:51:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:51,236 INFO L470 AbstractCegarLoop]: Abstraction has 3071 states and 4956 transitions. [2021-11-12 23:51:51,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:51:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 4956 transitions. [2021-11-12 23:51:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:51:51,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:51,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:51:51,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:51,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:51,458 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1228195551, now seen corresponding path program 1 times [2021-11-12 23:51:51,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:51,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118841622] [2021-11-12 23:51:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:51,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:51,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:51,460 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:51,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:51:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:52,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:52,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:52,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118841622] [2021-11-12 23:51:52,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118841622] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:51:52,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:51:52,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:51:52,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859056162] [2021-11-12 23:51:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:52,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:51:52,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:52,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:51:52,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:51:52,961 INFO L87 Difference]: Start difference. First operand 3071 states and 4956 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:51:54,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:51:56,994 WARN L515 Checker$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 23:51:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:51:57,891 INFO L93 Difference]: Finished difference Result 6122 states and 10053 transitions. [2021-11-12 23:51:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:51:57,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 165 [2021-11-12 23:51:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:51:57,928 INFO L225 Difference]: With dead ends: 6122 [2021-11-12 23:51:57,929 INFO L226 Difference]: Without dead ends: 3131 [2021-11-12 23:51:57,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 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 23:51:57,942 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 781 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4675.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4784.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:51:57,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2167 Invalid, 462 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [12 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 4784.19ms Time] [2021-11-12 23:51:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-12 23:51:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2021-11-12 23:51:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2346 states have (on average 1.5814151747655585) internal successors, (3710), 2437 states have internal predecessors, (3710), 624 states have call successors, (624), 144 states have call predecessors, (624), 160 states have return successors, (678), 582 states have call predecessors, (678), 619 states have call successors, (678) [2021-11-12 23:51:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5012 transitions. [2021-11-12 23:51:58,139 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5012 transitions. Word has length 165 [2021-11-12 23:51:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:51:58,141 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 5012 transitions. [2021-11-12 23:51:58,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:51:58,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5012 transitions. [2021-11-12 23:51:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-12 23:51:58,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:51:58,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:51:58,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:51:58,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:51:58,362 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:51:58,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:51:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -887593935, now seen corresponding path program 1 times [2021-11-12 23:51:58,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:51:58,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741305449] [2021-11-12 23:51:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:51:58,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:51:58,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:51:58,365 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:51:58,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:51:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:51:58,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:51:58,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:51:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:51:59,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:51:59,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741305449] [2021-11-12 23:51:59,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741305449] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:51:59,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:51:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:51:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199704871] [2021-11-12 23:51:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:51:59,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:51:59,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:51:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:51:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:51:59,863 INFO L87 Difference]: Start difference. First operand 3131 states and 5012 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:52:01,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:03,893 WARN L515 Checker$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 23:52:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:04,752 INFO L93 Difference]: Finished difference Result 6252 states and 10165 transitions. [2021-11-12 23:52:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:52:04,753 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2021-11-12 23:52:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:04,767 INFO L225 Difference]: With dead ends: 6252 [2021-11-12 23:52:04,767 INFO L226 Difference]: Without dead ends: 3201 [2021-11-12 23:52:04,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 325 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 23:52:04,779 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 785 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4636.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.63ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4744.39ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:04,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2167 Invalid, 461 Unknown, 0 Unchecked, 4.63ms Time], IncrementalHoareTripleChecker [10 Valid, 449 Invalid, 2 Unknown, 0 Unchecked, 4744.39ms Time] [2021-11-12 23:52:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-11-12 23:52:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3201. [2021-11-12 23:52:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 2406 states have (on average 1.5669160432252702) internal successors, (3770), 2497 states have internal predecessors, (3770), 624 states have call successors, (624), 154 states have call predecessors, (624), 170 states have return successors, (684), 582 states have call predecessors, (684), 619 states have call successors, (684) [2021-11-12 23:52:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 5078 transitions. [2021-11-12 23:52:04,959 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 5078 transitions. Word has length 167 [2021-11-12 23:52:04,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:04,960 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 5078 transitions. [2021-11-12 23:52:04,960 INFO L471 AbstractCegarLoop]: INTERPOLANT 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, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:52:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 5078 transitions. [2021-11-12 23:52:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 23:52:04,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:04,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:52:04,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:05,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:05,186 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:05,186 INFO L85 PathProgramCache]: Analyzing trace with hash 65419103, now seen corresponding path program 1 times [2021-11-12 23:52:05,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:05,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37706562] [2021-11-12 23:52:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:05,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:05,189 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:05,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:52:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:05,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:52:05,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:52:06,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:52:07,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:07,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37706562] [2021-11-12 23:52:07,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37706562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:07,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [722029404] [2021-11-12 23:52:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:07,931 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:07,932 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:07,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:52:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:52:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:52:08,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:52:09,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [722029404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:09,546 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:52:09,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:52:09,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112162560] [2021-11-12 23:52:09,547 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:09,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:52:09,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:09,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:52:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:52:09,548 INFO L87 Difference]: Start difference. First operand 3201 states and 5078 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:52:11,567 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 23:52:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:12,353 INFO L93 Difference]: Finished difference Result 6273 states and 10020 transitions. [2021-11-12 23:52:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:52:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 169 [2021-11-12 23:52:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:12,384 INFO L225 Difference]: With dead ends: 6273 [2021-11-12 23:52:12,384 INFO L226 Difference]: Without dead ends: 3152 [2021-11-12 23:52:12,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:52:12,397 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 1895 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 551 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2540.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.30ms SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2655.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:12,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 783 Invalid, 655 Unknown, 0 Unchecked, 4.30ms Time], IncrementalHoareTripleChecker [551 Valid, 103 Invalid, 1 Unknown, 0 Unchecked, 2655.51ms Time] [2021-11-12 23:52:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-11-12 23:52:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2021-11-12 23:52:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 2374 states have (on average 1.5606571187868576) internal successors, (3705), 2464 states have internal predecessors, (3705), 607 states have call successors, (607), 154 states have call predecessors, (607), 170 states have return successors, (668), 566 states have call predecessors, (668), 603 states have call successors, (668) [2021-11-12 23:52:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4980 transitions. [2021-11-12 23:52:12,657 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4980 transitions. Word has length 169 [2021-11-12 23:52:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:12,658 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 4980 transitions. [2021-11-12 23:52:12,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:52:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4980 transitions. [2021-11-12 23:52:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:52:12,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:12,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 23:52:12,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:12,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:13,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:13,076 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:13,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:13,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2027705661, now seen corresponding path program 1 times [2021-11-12 23:52:13,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:13,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98056563] [2021-11-12 23:52:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:13,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:13,077 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:13,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 23:52:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:13,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:52:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:52:14,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:52:15,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:15,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98056563] [2021-11-12 23:52:15,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98056563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:15,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [150952516] [2021-11-12 23:52:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:15,525 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:15,533 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:15,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 23:52:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:16,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:52:16,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:52:16,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:52:17,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [150952516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:17,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114043264] [2021-11-12 23:52:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:17,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:17,567 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:52:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 23:52:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:52:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:52:18,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:52:19,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114043264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:19,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:52:19,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:52:19,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719420686] [2021-11-12 23:52:19,408 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:52:19,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:52:19,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:52:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:52:19,409 INFO L87 Difference]: Start difference. First operand 3152 states and 4980 transitions. Second operand has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-12 23:52:21,447 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 23:52:23,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:25,461 WARN L515 Checker$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 23:52:27,467 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 23:52:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:36,341 INFO L93 Difference]: Finished difference Result 10889 states and 17739 transitions. [2021-11-12 23:52:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:52:36,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) Word has length 170 [2021-11-12 23:52:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:36,378 INFO L225 Difference]: With dead ends: 10889 [2021-11-12 23:52:36,379 INFO L226 Difference]: Without dead ends: 7817 [2021-11-12 23:52:36,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:52:36,393 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 6396 mSDsluCounter, 4266 mSDsCounter, 0 mSdLazyCounter, 7838 mSolverCounterSat, 2585 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15195.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6475 SdHoareTripleChecker+Valid, 5960 SdHoareTripleChecker+Invalid, 10427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.81ms SdHoareTripleChecker+Time, 2585 IncrementalHoareTripleChecker+Valid, 7838 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16294.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:36,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6475 Valid, 5960 Invalid, 10427 Unknown, 0 Unchecked, 40.81ms Time], IncrementalHoareTripleChecker [2585 Valid, 7838 Invalid, 4 Unknown, 0 Unchecked, 16294.24ms Time] [2021-11-12 23:52:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2021-11-12 23:52:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7006. [2021-11-12 23:52:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7006 states, 5217 states have (on average 1.5597086448150277) internal successors, (8137), 5411 states have internal predecessors, (8137), 1416 states have call successors, (1416), 301 states have call predecessors, (1416), 372 states have return successors, (1701), 1374 states have call predecessors, (1701), 1412 states have call successors, (1701) [2021-11-12 23:52:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7006 states to 7006 states and 11254 transitions. [2021-11-12 23:52:36,935 INFO L78 Accepts]: Start accepts. Automaton has 7006 states and 11254 transitions. Word has length 170 [2021-11-12 23:52:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:36,935 INFO L470 AbstractCegarLoop]: Abstraction has 7006 states and 11254 transitions. [2021-11-12 23:52:36,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-12 23:52:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7006 states and 11254 transitions. [2021-11-12 23:52:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 23:52:36,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:36,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:52:36,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:37,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:37,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:37,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:37,556 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash 969850946, now seen corresponding path program 1 times [2021-11-12 23:52:37,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:37,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295316295] [2021-11-12 23:52:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:37,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:37,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:37,560 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:37,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:52:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:52:38,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:38,372 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 23:52:38,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:38,900 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 23:52:38,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:38,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295316295] [2021-11-12 23:52:38,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295316295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:52:38,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:52:38,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:52:38,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521546996] [2021-11-12 23:52:38,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:52:38,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:52:38,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:52:38,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:52:38,903 INFO L87 Difference]: Start difference. First operand 7006 states and 11254 transitions. Second operand has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 23:52:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:52:39,213 INFO L93 Difference]: Finished difference Result 10056 states and 16100 transitions. [2021-11-12 23:52:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:52:39,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2021-11-12 23:52:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:52:39,226 INFO L225 Difference]: With dead ends: 10056 [2021-11-12 23:52:39,226 INFO L226 Difference]: Without dead ends: 3120 [2021-11-12 23:52:39,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:52:39,248 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 82 mSDsluCounter, 5806 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 6647 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.81ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:52:39,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 6647 Invalid, 102 Unknown, 0 Unchecked, 5.81ms Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 115.30ms Time] [2021-11-12 23:52:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-11-12 23:52:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 3120. [2021-11-12 23:52:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 2354 states have (on average 1.5590484282073067) internal successors, (3670), 2444 states have internal predecessors, (3670), 595 states have call successors, (595), 154 states have call predecessors, (595), 170 states have return successors, (656), 554 states have call predecessors, (656), 591 states have call successors, (656) [2021-11-12 23:52:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 4921 transitions. [2021-11-12 23:52:39,506 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 4921 transitions. Word has length 172 [2021-11-12 23:52:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:52:39,507 INFO L470 AbstractCegarLoop]: Abstraction has 3120 states and 4921 transitions. [2021-11-12 23:52:39,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 23:52:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 4921 transitions. [2021-11-12 23:52:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 23:52:39,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:52:39,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-11-12 23:52:39,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:52:39,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:52:39,726 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:52:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:52:39,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1407399397, now seen corresponding path program 1 times [2021-11-12 23:52:39,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:52:39,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579042009] [2021-11-12 23:52:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:39,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:52:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:52:39,729 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:52:39,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:52:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:40,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:52:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:52:40,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:52:41,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:52:41,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579042009] [2021-11-12 23:52:41,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579042009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:41,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754499301] [2021-11-12 23:52:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:41,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:52:42,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:52:42,000 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:52:42,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 23:52:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:52:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:52:43,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:52:44,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754499301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:44,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509075065] [2021-11-12 23:52:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:52:44,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:52:44,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:52:44,174 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:52:44,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-12 23:52:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:52:44,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:52:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:52:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:52:45,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:52:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:52:46,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509075065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:52:46,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:52:46,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:52:46,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977546855] [2021-11-12 23:52:46,172 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:52:46,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:52:46,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:52:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:52:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:52:46,174 INFO L87 Difference]: Start difference. First operand 3120 states and 4921 transitions. Second operand has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-12 23:52:48,192 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 23:52:50,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:52,204 WARN L515 Checker$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 23:52:54,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:52:56,216 WARN L515 Checker$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 23:52:58,222 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 23:53:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:01,327 INFO L93 Difference]: Finished difference Result 6206 states and 9890 transitions. [2021-11-12 23:53:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:53:01,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) Word has length 176 [2021-11-12 23:53:01,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:01,339 INFO L225 Difference]: With dead ends: 6206 [2021-11-12 23:53:01,339 INFO L226 Difference]: Without dead ends: 3164 [2021-11-12 23:53:01,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:53:01,351 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1920 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 3399 mSolverCounterSat, 556 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14477.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.52ms SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 3399 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14879.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:01,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 2598 Invalid, 3961 Unknown, 0 Unchecked, 15.52ms Time], IncrementalHoareTripleChecker [556 Valid, 3399 Invalid, 6 Unknown, 0 Unchecked, 14879.95ms Time] [2021-11-12 23:53:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-11-12 23:53:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3144. [2021-11-12 23:53:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 2372 states have (on average 1.554806070826307) internal successors, (3688), 2462 states have internal predecessors, (3688), 595 states have call successors, (595), 154 states have call predecessors, (595), 176 states have return successors, (680), 560 states have call predecessors, (680), 591 states have call successors, (680) [2021-11-12 23:53:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 4963 transitions. [2021-11-12 23:53:01,545 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 4963 transitions. Word has length 176 [2021-11-12 23:53:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:01,546 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 4963 transitions. [2021-11-12 23:53:01,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-12 23:53:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 4963 transitions. [2021-11-12 23:53:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 23:53:01,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:01,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-11-12 23:53:01,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:01,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-12 23:53:01,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-12 23:53:02,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:02,170 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1818812850, now seen corresponding path program 1 times [2021-11-12 23:53:02,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:02,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306789349] [2021-11-12 23:53:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:02,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:02,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:02,178 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:02,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 23:53:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:53:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:53:03,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:53:03,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:03,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306789349] [2021-11-12 23:53:03,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306789349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:03,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [832174626] [2021-11-12 23:53:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:03,733 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:03,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:53:03,734 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:53:03,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 23:53:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:53:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:53:04,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:53:05,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [832174626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:05,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678874005] [2021-11-12 23:53:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:05,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:53:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:53:05,072 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:53:05,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-12 23:53:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:05,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:53:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:53:05,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:53:06,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678874005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:53:06,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:53:06,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:53:06,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033117950] [2021-11-12 23:53:06,327 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:53:06,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:53:06,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:06,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:53:06,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:53:06,329 INFO L87 Difference]: Start difference. First operand 3144 states and 4963 transitions. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 23:53:08,348 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 23:53:10,353 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 23:53:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:15,522 INFO L93 Difference]: Finished difference Result 10922 states and 17404 transitions. [2021-11-12 23:53:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:53:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) Word has length 177 [2021-11-12 23:53:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:15,555 INFO L225 Difference]: With dead ends: 10922 [2021-11-12 23:53:15,555 INFO L226 Difference]: Without dead ends: 7844 [2021-11-12 23:53:15,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:53:15,571 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 3987 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 3599 mSolverCounterSat, 1204 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8013.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4069 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 4805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.99ms SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 3599 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8639.83ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:15,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4069 Valid, 2789 Invalid, 4805 Unknown, 0 Unchecked, 22.99ms Time], IncrementalHoareTripleChecker [1204 Valid, 3599 Invalid, 2 Unknown, 0 Unchecked, 8639.83ms Time] [2021-11-12 23:53:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7844 states. [2021-11-12 23:53:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7844 to 7792. [2021-11-12 23:53:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 5892 states have (on average 1.5295315682281059) internal successors, (9012), 6098 states have internal predecessors, (9012), 1423 states have call successors, (1423), 434 states have call predecessors, (1423), 476 states have return successors, (1734), 1336 states have call predecessors, (1734), 1419 states have call successors, (1734) [2021-11-12 23:53:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 12169 transitions. [2021-11-12 23:53:16,325 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 12169 transitions. Word has length 177 [2021-11-12 23:53:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:16,326 INFO L470 AbstractCegarLoop]: Abstraction has 7792 states and 12169 transitions. [2021-11-12 23:53:16,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-12 23:53:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 12169 transitions. [2021-11-12 23:53:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:53:16,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:16,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-11-12 23:53:16,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:16,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:16,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:16,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:53:16,955 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash 66120968, now seen corresponding path program 1 times [2021-11-12 23:53:16,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:16,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846401908] [2021-11-12 23:53:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:16,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:16,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:16,958 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:16,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:53:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:17,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:53:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:53:18,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:53:18,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:18,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846401908] [2021-11-12 23:53:18,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846401908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:18,933 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:18,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:53:18,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614878721] [2021-11-12 23:53:18,933 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:18,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:53:18,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:18,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:53:18,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:53:18,934 INFO L87 Difference]: Start difference. First operand 7792 states and 12169 transitions. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:53:20,955 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 23:53:22,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:24,967 WARN L515 Checker$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 23:53:26,973 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 23:53:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:33,918 INFO L93 Difference]: Finished difference Result 21938 states and 35275 transitions. [2021-11-12 23:53:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:53:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) Word has length 179 [2021-11-12 23:53:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:34,003 INFO L225 Difference]: With dead ends: 21938 [2021-11-12 23:53:34,004 INFO L226 Difference]: Without dead ends: 14218 [2021-11-12 23:53:34,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:53:34,044 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 4447 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 5260 mSolverCounterSat, 1429 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13123.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4549 SdHoareTripleChecker+Valid, 3407 SdHoareTripleChecker+Invalid, 6693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.80ms SdHoareTripleChecker+Time, 1429 IncrementalHoareTripleChecker+Valid, 5260 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13952.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:34,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4549 Valid, 3407 Invalid, 6693 Unknown, 0 Unchecked, 29.80ms Time], IncrementalHoareTripleChecker [1429 Valid, 5260 Invalid, 4 Unknown, 0 Unchecked, 13952.52ms Time] [2021-11-12 23:53:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2021-11-12 23:53:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 13128. [2021-11-12 23:53:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13128 states, 9787 states have (on average 1.5296822315316236) internal successors, (14971), 10191 states have internal predecessors, (14971), 2571 states have call successors, (2571), 651 states have call predecessors, (2571), 769 states have return successors, (3184), 2474 states have call predecessors, (3184), 2567 states have call successors, (3184) [2021-11-12 23:53:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13128 states to 13128 states and 20726 transitions. [2021-11-12 23:53:35,143 INFO L78 Accepts]: Start accepts. Automaton has 13128 states and 20726 transitions. Word has length 179 [2021-11-12 23:53:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:35,144 INFO L470 AbstractCegarLoop]: Abstraction has 13128 states and 20726 transitions. [2021-11-12 23:53:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:53:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13128 states and 20726 transitions. [2021-11-12 23:53:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 23:53:35,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:35,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-11-12 23:53:35,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:53:35,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:35,363 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:35,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1847620903, now seen corresponding path program 1 times [2021-11-12 23:53:35,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:35,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327090297] [2021-11-12 23:53:35,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:35,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:35,365 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:35,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:53:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:36,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:53:36,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:53:36,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:53:37,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:37,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327090297] [2021-11-12 23:53:37,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327090297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:37,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:37,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:53:37,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592544787] [2021-11-12 23:53:37,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:37,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:53:37,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:53:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:53:37,273 INFO L87 Difference]: Start difference. First operand 13128 states and 20726 transitions. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:53:39,292 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 23:53:41,299 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 23:53:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:53:48,559 INFO L93 Difference]: Finished difference Result 39640 states and 64095 transitions. [2021-11-12 23:53:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:53:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 179 [2021-11-12 23:53:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:53:48,724 INFO L225 Difference]: With dead ends: 39640 [2021-11-12 23:53:48,724 INFO L226 Difference]: Without dead ends: 28365 [2021-11-12 23:53:48,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:53:48,762 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 3169 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 4560 mSolverCounterSat, 725 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8670.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3242 SdHoareTripleChecker+Valid, 3050 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.07ms SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 4560 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9386.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:53:48,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3242 Valid, 3050 Invalid, 5287 Unknown, 0 Unchecked, 29.07ms Time], IncrementalHoareTripleChecker [725 Valid, 4560 Invalid, 2 Unknown, 0 Unchecked, 9386.90ms Time] [2021-11-12 23:53:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28365 states. [2021-11-12 23:53:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28365 to 26912. [2021-11-12 23:53:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26912 states, 20043 states have (on average 1.5288130519383325) internal successors, (30642), 20930 states have internal predecessors, (30642), 5180 states have call successors, (5180), 1260 states have call predecessors, (5180), 1688 states have return successors, (7165), 5072 states have call predecessors, (7165), 5176 states have call successors, (7165) [2021-11-12 23:53:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26912 states to 26912 states and 42987 transitions. [2021-11-12 23:53:50,748 INFO L78 Accepts]: Start accepts. Automaton has 26912 states and 42987 transitions. Word has length 179 [2021-11-12 23:53:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:53:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 26912 states and 42987 transitions. [2021-11-12 23:53:50,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:53:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26912 states and 42987 transitions. [2021-11-12 23:53:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-12 23:53:50,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:53:50,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2021-11-12 23:53:50,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-12 23:53:50,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:53:50,952 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:53:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:53:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 579887911, now seen corresponding path program 1 times [2021-11-12 23:53:50,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:53:50,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974984965] [2021-11-12 23:53:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:53:50,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:53:50,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:53:50,954 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:53:50,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:53:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:53:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:53:51,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:53:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:53:52,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:53:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:53:53,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:53:53,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974984965] [2021-11-12 23:53:53,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974984965] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:53:53,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:53:53,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 23:53:53,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979807676] [2021-11-12 23:53:53,690 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:53:53,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:53:53,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:53:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:53:53,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:53:53,692 INFO L87 Difference]: Start difference. First operand 26912 states and 42987 transitions. Second operand has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-12 23:53:55,726 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 23:53:57,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:53:59,740 WARN L515 Checker$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 23:54:01,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:03,752 WARN L515 Checker$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 23:54:05,758 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 23:54:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:11,231 INFO L93 Difference]: Finished difference Result 51758 states and 83509 transitions. [2021-11-12 23:54:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:54:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) Word has length 181 [2021-11-12 23:54:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:11,386 INFO L225 Difference]: With dead ends: 51758 [2021-11-12 23:54:11,386 INFO L226 Difference]: Without dead ends: 26699 [2021-11-12 23:54:11,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:54:11,464 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 1537 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 3217 mSolverCounterSat, 388 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15149.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.89ms SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3217 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15624.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:11,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 2595 Invalid, 3611 Unknown, 0 Unchecked, 21.89ms Time], IncrementalHoareTripleChecker [388 Valid, 3217 Invalid, 6 Unknown, 0 Unchecked, 15624.67ms Time] [2021-11-12 23:54:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26699 states. [2021-11-12 23:54:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26699 to 26699. [2021-11-12 23:54:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26699 states, 19926 states have (on average 1.5290575127973502) internal successors, (30468), 20795 states have internal predecessors, (30468), 5123 states have call successors, (5123), 1239 states have call predecessors, (5123), 1649 states have return successors, (7072), 5015 states have call predecessors, (7072), 5119 states have call successors, (7072) [2021-11-12 23:54:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26699 states to 26699 states and 42663 transitions. [2021-11-12 23:54:13,544 INFO L78 Accepts]: Start accepts. Automaton has 26699 states and 42663 transitions. Word has length 181 [2021-11-12 23:54:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:13,545 INFO L470 AbstractCegarLoop]: Abstraction has 26699 states and 42663 transitions. [2021-11-12 23:54:13,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-12 23:54:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26699 states and 42663 transitions. [2021-11-12 23:54:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:54:13,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:13,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:13,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:13,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:13,765 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1511258106, now seen corresponding path program 1 times [2021-11-12 23:54:13,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:13,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635251332] [2021-11-12 23:54:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:13,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:13,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:13,767 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:13,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:54:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:54:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:54:15,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:54:16,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:16,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635251332] [2021-11-12 23:54:16,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635251332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:16,366 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:16,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:54:16,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026778776] [2021-11-12 23:54:16,367 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:54:16,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:54:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:54:16,368 INFO L87 Difference]: Start difference. First operand 26699 states and 42663 transitions. Second operand has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 23:54:18,398 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 23:54:20,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:54:22,410 WARN L515 Checker$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 23:54:24,415 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 23:54:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:39,089 INFO L93 Difference]: Finished difference Result 73450 states and 118430 transitions. [2021-11-12 23:54:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:54:39,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) Word has length 184 [2021-11-12 23:54:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:39,333 INFO L225 Difference]: With dead ends: 73450 [2021-11-12 23:54:39,333 INFO L226 Difference]: Without dead ends: 47899 [2021-11-12 23:54:39,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:54:39,421 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 3968 mSDsluCounter, 3320 mSDsCounter, 0 mSdLazyCounter, 8747 mSolverCounterSat, 1152 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17434.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 4284 SdHoareTripleChecker+Invalid, 9903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.10ms SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 8747 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18771.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:39,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4045 Valid, 4284 Invalid, 9903 Unknown, 0 Unchecked, 56.10ms Time], IncrementalHoareTripleChecker [1152 Valid, 8747 Invalid, 4 Unknown, 0 Unchecked, 18771.49ms Time] [2021-11-12 23:54:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47899 states. [2021-11-12 23:54:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47899 to 47101. [2021-11-12 23:54:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47101 states, 34850 states have (on average 1.5104447632711622) internal successors, (52639), 36480 states have internal predecessors, (52639), 9256 states have call successors, (9256), 2291 states have call predecessors, (9256), 2994 states have return successors, (12959), 9004 states have call predecessors, (12959), 9252 states have call successors, (12959) [2021-11-12 23:54:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47101 states to 47101 states and 74854 transitions. [2021-11-12 23:54:42,553 INFO L78 Accepts]: Start accepts. Automaton has 47101 states and 74854 transitions. Word has length 184 [2021-11-12 23:54:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:42,554 INFO L470 AbstractCegarLoop]: Abstraction has 47101 states and 74854 transitions. [2021-11-12 23:54:42,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 23:54:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 47101 states and 74854 transitions. [2021-11-12 23:54:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 23:54:42,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:42,560 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:42,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:42,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:42,770 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:42,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash -598961750, now seen corresponding path program 1 times [2021-11-12 23:54:42,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:42,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938275531] [2021-11-12 23:54:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:42,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:42,772 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:42,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:54:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:43,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:54:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:54:43,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:54:44,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:44,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938275531] [2021-11-12 23:54:44,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938275531] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:44,108 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:44,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:54:44,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193698767] [2021-11-12 23:54:44,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:44,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:54:44,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:54:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:54:44,110 INFO L87 Difference]: Start difference. First operand 47101 states and 74854 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:54:48,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:54:48,168 INFO L93 Difference]: Finished difference Result 95184 states and 153652 transitions. [2021-11-12 23:54:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:54:48,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 191 [2021-11-12 23:54:48,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:54:48,723 INFO L225 Difference]: With dead ends: 95184 [2021-11-12 23:54:48,723 INFO L226 Difference]: Without dead ends: 47101 [2021-11-12 23:54:48,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:54:48,841 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 528 mSDsluCounter, 3004 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 3885 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.19ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 288.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:54:48,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 3885 Invalid, 141 Unknown, 0 Unchecked, 5.19ms Time], IncrementalHoareTripleChecker [49 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 288.37ms Time] [2021-11-12 23:54:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47101 states. [2021-11-12 23:54:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47101 to 47101. [2021-11-12 23:54:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47101 states, 34850 states have (on average 1.4951219512195122) internal successors, (52105), 36480 states have internal predecessors, (52105), 9256 states have call successors, (9256), 2291 states have call predecessors, (9256), 2994 states have return successors, (12959), 9004 states have call predecessors, (12959), 9252 states have call successors, (12959) [2021-11-12 23:54:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47101 states to 47101 states and 74320 transitions. [2021-11-12 23:54:52,294 INFO L78 Accepts]: Start accepts. Automaton has 47101 states and 74320 transitions. Word has length 191 [2021-11-12 23:54:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:54:52,295 INFO L470 AbstractCegarLoop]: Abstraction has 47101 states and 74320 transitions. [2021-11-12 23:54:52,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:54:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 47101 states and 74320 transitions. [2021-11-12 23:54:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 23:54:52,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:54:52,301 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:54:52,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:54:52,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:54:52,502 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:54:52,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:54:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash 557313171, now seen corresponding path program 1 times [2021-11-12 23:54:52,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:54:52,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322161796] [2021-11-12 23:54:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:54:52,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:54:52,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:54:52,505 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:54:52,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 23:54:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:54:53,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:54:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:54:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:54:53,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:54:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:54:54,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:54:54,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322161796] [2021-11-12 23:54:54,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322161796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:54:54,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:54:54,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:54:54,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097986482] [2021-11-12 23:54:54,498 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:54:54,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:54:54,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:54:54,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:54:54,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:54:54,500 INFO L87 Difference]: Start difference. First operand 47101 states and 74320 transitions. Second operand has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 6 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 6 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-12 23:54:56,524 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 23:54:58,531 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 23:55:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:07,544 INFO L93 Difference]: Finished difference Result 97142 states and 155138 transitions. [2021-11-12 23:55:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:55:07,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 6 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 6 states have call predecessors, (33), 5 states have call successors, (33) Word has length 196 [2021-11-12 23:55:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:07,976 INFO L225 Difference]: With dead ends: 97142 [2021-11-12 23:55:07,977 INFO L226 Difference]: Without dead ends: 52144 [2021-11-12 23:55:08,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:55:08,119 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 2010 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 518 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8147.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.26ms SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9011.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:08,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 2388 Invalid, 4026 Unknown, 0 Unchecked, 26.26ms Time], IncrementalHoareTripleChecker [518 Valid, 3506 Invalid, 2 Unknown, 0 Unchecked, 9011.97ms Time] [2021-11-12 23:55:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52144 states. [2021-11-12 23:55:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52144 to 48775. [2021-11-12 23:55:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48775 states, 36092 states have (on average 1.48855702094647) internal successors, (53725), 37812 states have internal predecessors, (53725), 9427 states have call successors, (9427), 2453 states have call predecessors, (9427), 3255 states have return successors, (13400), 9184 states have call predecessors, (13400), 9423 states have call successors, (13400) [2021-11-12 23:55:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48775 states to 48775 states and 76552 transitions. [2021-11-12 23:55:12,067 INFO L78 Accepts]: Start accepts. Automaton has 48775 states and 76552 transitions. Word has length 196 [2021-11-12 23:55:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:55:12,068 INFO L470 AbstractCegarLoop]: Abstraction has 48775 states and 76552 transitions. [2021-11-12 23:55:12,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 6 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 6 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-12 23:55:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 48775 states and 76552 transitions. [2021-11-12 23:55:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-12 23:55:12,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:55:12,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:55:12,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-12 23:55:12,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:55:12,275 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:55:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:55:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -100396775, now seen corresponding path program 1 times [2021-11-12 23:55:12,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:55:12,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894521137] [2021-11-12 23:55:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:55:12,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:55:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:55:12,278 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:55:12,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6770078-7d9e-414d-a089-aea7c03e7326/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-12 23:55:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:55:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:55:12,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:55:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:55:13,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:55:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:55:14,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:55:14,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894521137] [2021-11-12 23:55:14,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894521137] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:55:14,718 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:55:14,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:55:14,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168837782] [2021-11-12 23:55:14,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:55:14,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:55:14,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:55:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:55:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:55:14,720 INFO L87 Difference]: Start difference. First operand 48775 states and 76552 transitions. Second operand has 13 states, 13 states have (on average 15.23076923076923) internal successors, (198), 11 states have internal predecessors, (198), 7 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 9 states have call predecessors, (36), 6 states have call successors, (36) [2021-11-12 23:55:16,744 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 23:55:18,752 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 23:55:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:55:33,236 INFO L93 Difference]: Finished difference Result 133241 states and 212540 transitions. [2021-11-12 23:55:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:55:33,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.23076923076923) internal successors, (198), 11 states have internal predecessors, (198), 7 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 9 states have call predecessors, (36), 6 states have call successors, (36) Word has length 201 [2021-11-12 23:55:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:55:33,735 INFO L225 Difference]: With dead ends: 133241 [2021-11-12 23:55:33,735 INFO L226 Difference]: Without dead ends: 86547 [2021-11-12 23:55:33,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:55:33,928 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 3234 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 4966 mSolverCounterSat, 936 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10401.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3308 SdHoareTripleChecker+Valid, 2915 SdHoareTripleChecker+Invalid, 5904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.49ms SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 4966 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11563.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:55:33,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3308 Valid, 2915 Invalid, 5904 Unknown, 0 Unchecked, 34.49ms Time], IncrementalHoareTripleChecker [936 Valid, 4966 Invalid, 2 Unknown, 0 Unchecked, 11563.80ms Time] [2021-11-12 23:55:34,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86547 states.