./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:55:13,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:55:13,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:55:13,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:55:13,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:55:13,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:55:13,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:55:13,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:55:13,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:55:13,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:55:13,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:55:13,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:55:13,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:55:13,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:55:13,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:55:13,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:55:13,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:55:13,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:55:13,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:55:13,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:55:13,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:55:13,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:55:13,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:55:13,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:55:13,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:55:13,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:55:13,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:55:13,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:55:13,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:55:13,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:55:13,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:55:13,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:55:13,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:55:13,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:55:13,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:55:13,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:55:13,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:55:13,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:55:13,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:55:13,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:55:13,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:55:13,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:55:13,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:55:13,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:55:13,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:55:13,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:55:13,474 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:55:13,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:55:13,474 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:55:13,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:55:13,475 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:55:13,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:55:13,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:55:13,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:55:13,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:55:13,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:55:13,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:55:13,476 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:55:13,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:55:13,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:55:13,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:55:13,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:55:13,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:55:13,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:55:13,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:55:13,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:55:13,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:55:13,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:55:13,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:55:13,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:55:13,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:55:13,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:55:13,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:55:13,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:55:13,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:55:13,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:55:13,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:55:13,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:55:13,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:55:13,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:55:13,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:55:13,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:55:13,481 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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2021-11-12 22:55:13,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:55:13,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:55:13,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:55:13,787 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:55:13,788 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:55:13,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-12 22:55:13,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/6b6304462/a4aae28e222c41a9b64bb8f89915ae1a/FLAG0a1895348 [2021-11-12 22:55:14,517 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:55:14,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-12 22:55:14,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/6b6304462/a4aae28e222c41a9b64bb8f89915ae1a/FLAG0a1895348 [2021-11-12 22:55:14,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/6b6304462/a4aae28e222c41a9b64bb8f89915ae1a [2021-11-12 22:55:14,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:55:14,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:55:14,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:14,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:55:14,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:55:14,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:14" (1/1) ... [2021-11-12 22:55:14,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b572aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:14, skipping insertion in model container [2021-11-12 22:55:14,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:14" (1/1) ... [2021-11-12 22:55:14,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:55:14,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:55:15,311 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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-12 22:55:15,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:15,403 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:55:15,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d8c94b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:15, skipping insertion in model container [2021-11-12 22:55:15,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:15,404 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:55:15,406 INFO L158 Benchmark]: Toolchain (without parser) took 688.32ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 63.7MB in the end (delta: 202.8kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 22:55:15,407 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 75.5MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:55:15,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 685.65ms. Allocated memory is still 100.7MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: -24.7kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 22:55:15,414 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 75.5MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 685.65ms. Allocated memory is still 100.7MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: -24.7kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3159]: 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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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 bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:55:17,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:55:17,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:55:17,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:55:17,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:55:17,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:55:17,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:55:17,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:55:17,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:55:17,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:55:17,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:55:17,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:55:17,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:55:17,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:55:17,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:55:17,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:55:17,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:55:17,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:55:17,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:55:17,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:55:17,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:55:17,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:55:17,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:55:17,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:55:17,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:55:17,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:55:17,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:55:17,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:55:17,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:55:17,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:55:17,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:55:17,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:55:17,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:55:17,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:55:17,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:55:17,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:55:17,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:55:17,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:55:17,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:55:17,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:55:17,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:55:17,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:55:17,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:55:17,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:55:17,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:55:17,814 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:55:17,814 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:55:17,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:55:17,814 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:55:17,815 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:55:17,815 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:55:17,815 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:55:17,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:55:17,818 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:55:17,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:55:17,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:55:17,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:55:17,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:55:17,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:55:17,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:55:17,820 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:55:17,820 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:55:17,820 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:55:17,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:55:17,821 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:55:17,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:55:17,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:55:17,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:55:17,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:55:17,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:55:17,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:55:17,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:55:17,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:55:17,823 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:55:17,823 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:17,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:55:17,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:55:17,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:55:17,825 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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bff47839034fd9cbb920af5a298a9e1741d5a9c8d5dbee3233345fdc3046fb27 [2021-11-12 22:55:18,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:55:18,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:55:18,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:55:18,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:55:18,251 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:55:18,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-12 22:55:18,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/4fa94b68d/7e1665864fb54089a1b8ae6615c3e6ff/FLAGc0329f4ad [2021-11-12 22:55:19,092 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:55:19,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c [2021-11-12 22:55:19,116 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/4fa94b68d/7e1665864fb54089a1b8ae6615c3e6ff/FLAGc0329f4ad [2021-11-12 22:55:19,256 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/data/4fa94b68d/7e1665864fb54089a1b8ae6615c3e6ff [2021-11-12 22:55:19,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:55:19,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:55:19,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:19,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:55:19,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:55:19,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:19" (1/1) ... [2021-11-12 22:55:19,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1257a47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:19, skipping insertion in model container [2021-11-12 22:55:19,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:55:19" (1/1) ... [2021-11-12 22:55:19,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:55:19,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:55:20,014 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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-12 22:55:20,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:20,103 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:55:20,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:55:20,225 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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-12 22:55:20,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:20,246 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:55:20,328 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_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/sv-benchmarks/c/product-lines/elevator_spec1_product28.cil.c[63597,63610] [2021-11-12 22:55:20,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:55:20,375 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:55:20,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20 WrapperNode [2021-11-12 22:55:20,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:55:20,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:55:20,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:55:20,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:55:20,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:55:20,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:55:20,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:55:20,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:55:20,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:55:20,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:55:20,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:55:20,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:55:20,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (1/1) ... [2021-11-12 22:55:20,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:55:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:55:20,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:55:20,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:55:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:55:20,728 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:55:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:55:20,729 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:55:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:55:20,729 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:55:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:55:20,729 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:55:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:55:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:55:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:55:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:55:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:55:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:55:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:55:20,730 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:55:20,730 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:55:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:55:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 22:55:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 22:55:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:55:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:55:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:55:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 22:55:20,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 22:55:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:55:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:55:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:55:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:55:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:55:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:55:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:55:20,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:55:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:55:20,733 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:55:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:55:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:55:20,733 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:55:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:55:20,734 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 22:55:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:55:20,734 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:55:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:55:20,734 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:55:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:55:20,735 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:55:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:55:20,735 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:55:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:55:20,736 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:55:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:55:20,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:55:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:55:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:55:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-12 22:55:20,738 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-12 22:55:24,633 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:55:24,634 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:55:24,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:55:24 BoogieIcfgContainer [2021-11-12 22:55:24,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:55:24,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:55:24,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:55:24,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:55:24,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:55:19" (1/3) ... [2021-11-12 22:55:24,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9c204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:55:24, skipping insertion in model container [2021-11-12 22:55:24,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:55:20" (2/3) ... [2021-11-12 22:55:24,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9c204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:55:24, skipping insertion in model container [2021-11-12 22:55:24,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:55:24" (3/3) ... [2021-11-12 22:55:24,651 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product28.cil.c [2021-11-12 22:55:24,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:55:24,657 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:55:24,731 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:55:24,743 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:55:24,743 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:55:24,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 585 states, 455 states have (on average 1.6835164835164835) internal successors, (766), 478 states have internal predecessors, (766), 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 22:55:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 22:55:24,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:24,823 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 22:55:24,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:24,829 INFO L85 PathProgramCache]: Analyzing trace with hash -512349069, now seen corresponding path program 1 times [2021-11-12 22:55:24,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:24,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158585584] [2021-11-12 22:55:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:24,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:24,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:24,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:24,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:55:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:25,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:55:25,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:25,834 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 22:55:25,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:26,027 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 22:55:26,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:26,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158585584] [2021-11-12 22:55:26,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158585584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:26,029 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:26,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:55:26,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378482271] [2021-11-12 22:55:26,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:26,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:55:26,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:26,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:55:26,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:55:26,075 INFO L87 Difference]: Start difference. First operand has 585 states, 455 states have (on average 1.6835164835164835) internal successors, (766), 478 states have internal predecessors, (766), 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 22:55:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:26,192 INFO L93 Difference]: Finished difference Result 606 states and 1000 transitions. [2021-11-12 22:55:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:55:26,195 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 22:55:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:26,240 INFO L225 Difference]: With dead ends: 606 [2021-11-12 22:55:26,240 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 22:55:26,249 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 22:55:26,254 INFO L933 BasicCegarLoop]: 961 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, 961 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:26,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 10.94ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:55:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 22:55:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 22:55:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6815144766146994) internal successors, (755), 470 states have internal predecessors, (755), 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 22:55:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 954 transitions. [2021-11-12 22:55:26,374 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 954 transitions. Word has length 83 [2021-11-12 22:55:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:26,376 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 954 transitions. [2021-11-12 22:55:26,377 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 22:55:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 954 transitions. [2021-11-12 22:55:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:55:26,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:26,383 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 22:55:26,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:26,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:26,594 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1351265145, now seen corresponding path program 1 times [2021-11-12 22:55:26,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:26,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137111004] [2021-11-12 22:55:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:26,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:26,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:26,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:55:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:27,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:27,447 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 22:55:27,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:27,745 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 22:55:27,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:27,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137111004] [2021-11-12 22:55:27,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137111004] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:27,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:27,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:27,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453099235] [2021-11-12 22:55:27,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:27,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:27,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:27,755 INFO L87 Difference]: Start difference. First operand 577 states and 954 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 22:55:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:27,928 INFO L93 Difference]: Finished difference Result 1145 states and 1900 transitions. [2021-11-12 22:55:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:27,929 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 22:55:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:27,938 INFO L225 Difference]: With dead ends: 1145 [2021-11-12 22:55:27,938 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 22:55:27,947 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 22:55:27,948 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 14 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.56ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:27,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2813 Invalid, 35 Unknown, 0 Unchecked, 46.56ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 43.39ms Time] [2021-11-12 22:55:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 22:55:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 22:55:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6792873051224944) internal successors, (754), 470 states have internal predecessors, (754), 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 22:55:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 953 transitions. [2021-11-12 22:55:28,020 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 953 transitions. Word has length 85 [2021-11-12 22:55:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:28,023 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 953 transitions. [2021-11-12 22:55:28,023 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 22:55:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 953 transitions. [2021-11-12 22:55:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:55:28,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:28,031 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 22:55:28,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:28,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:28,254 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:28,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1160595213, now seen corresponding path program 1 times [2021-11-12 22:55:28,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:28,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553835260] [2021-11-12 22:55:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:28,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:28,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:28,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:28,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:55:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:29,104 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 22:55:29,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:29,370 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 22:55:29,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:29,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553835260] [2021-11-12 22:55:29,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553835260] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:29,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:29,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:29,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693937398] [2021-11-12 22:55:29,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:29,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:29,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:29,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:29,399 INFO L87 Difference]: Start difference. First operand 577 states and 953 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 22:55:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:29,489 INFO L93 Difference]: Finished difference Result 1145 states and 1898 transitions. [2021-11-12 22:55:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:29,490 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 22:55:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:29,496 INFO L225 Difference]: With dead ends: 1145 [2021-11-12 22:55:29,496 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 22:55:29,500 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 22:55:29,501 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 12 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:29,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2813 Invalid, 33 Unknown, 0 Unchecked, 8.45ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 35.14ms Time] [2021-11-12 22:55:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 22:55:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 22:55:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 449 states have (on average 1.6770601336302895) internal successors, (753), 470 states have internal predecessors, (753), 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 22:55:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 952 transitions. [2021-11-12 22:55:29,539 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 952 transitions. Word has length 87 [2021-11-12 22:55:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:29,539 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 952 transitions. [2021-11-12 22:55:29,539 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 22:55:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 952 transitions. [2021-11-12 22:55:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:55:29,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:29,542 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 22:55:29,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:29,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:29,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash 301700615, now seen corresponding path program 1 times [2021-11-12 22:55:29,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:29,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187391351] [2021-11-12 22:55:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:29,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:29,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:29,771 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:29,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:55:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:30,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:30,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:30,582 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 22:55:30,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:30,820 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 22:55:30,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:30,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187391351] [2021-11-12 22:55:30,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187391351] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:30,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:30,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:30,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466262637] [2021-11-12 22:55:30,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:30,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:30,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:30,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:30,827 INFO L87 Difference]: Start difference. First operand 577 states and 952 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 22:55:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:30,924 INFO L93 Difference]: Finished difference Result 1149 states and 1901 transitions. [2021-11-12 22:55:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:30,925 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 22:55:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:30,931 INFO L225 Difference]: With dead ends: 1149 [2021-11-12 22:55:30,931 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 22:55:30,938 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 22:55:30,944 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 13 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:30,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2813 Invalid, 35 Unknown, 0 Unchecked, 7.25ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 43.70ms Time] [2021-11-12 22:55:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 22:55:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 22:55:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.669603524229075) internal successors, (758), 475 states have internal predecessors, (758), 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 22:55:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 957 transitions. [2021-11-12 22:55:31,000 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 957 transitions. Word has length 89 [2021-11-12 22:55:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:31,000 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 957 transitions. [2021-11-12 22:55:31,001 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 22:55:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 957 transitions. [2021-11-12 22:55:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:55:31,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:31,003 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 22:55:31,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:31,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:31,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1609654872, now seen corresponding path program 1 times [2021-11-12 22:55:31,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:31,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078795860] [2021-11-12 22:55:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:31,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:31,222 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:31,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:55:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:31,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:31,972 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 22:55:31,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:32,268 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 22:55:32,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:32,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078795860] [2021-11-12 22:55:32,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078795860] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:32,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:32,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:32,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315584565] [2021-11-12 22:55:32,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:32,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:32,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:32,270 INFO L87 Difference]: Start difference. First operand 583 states and 957 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 22:55:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:32,354 INFO L93 Difference]: Finished difference Result 1148 states and 1892 transitions. [2021-11-12 22:55:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:32,355 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 22:55:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:32,361 INFO L225 Difference]: With dead ends: 1148 [2021-11-12 22:55:32,361 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 22:55:32,365 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 22:55:32,366 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 8 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:32,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2814 Invalid, 30 Unknown, 0 Unchecked, 6.32ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 35.46ms Time] [2021-11-12 22:55:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 22:55:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 22:55:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.6674008810572687) internal successors, (757), 475 states have internal predecessors, (757), 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 22:55:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 956 transitions. [2021-11-12 22:55:32,398 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 956 transitions. Word has length 90 [2021-11-12 22:55:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:32,398 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 956 transitions. [2021-11-12 22:55:32,399 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 22:55:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 956 transitions. [2021-11-12 22:55:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 22:55:32,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:32,401 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 22:55:32,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:32,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:32,622 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1558891221, now seen corresponding path program 1 times [2021-11-12 22:55:32,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:32,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032021085] [2021-11-12 22:55:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:32,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:32,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:32,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:55:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:33,362 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 22:55:33,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:33,638 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 22:55:33,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:33,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032021085] [2021-11-12 22:55:33,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032021085] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:33,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:33,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:33,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326795068] [2021-11-12 22:55:33,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:33,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:33,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:33,640 INFO L87 Difference]: Start difference. First operand 583 states and 956 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 22:55:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:33,713 INFO L93 Difference]: Finished difference Result 1148 states and 1891 transitions. [2021-11-12 22:55:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:33,714 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 22:55:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:33,720 INFO L225 Difference]: With dead ends: 1148 [2021-11-12 22:55:33,720 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 22:55:33,723 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 22:55:33,724 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 6 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:33,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2814 Invalid, 28 Unknown, 0 Unchecked, 5.84ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 28.40ms Time] [2021-11-12 22:55:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 22:55:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 22:55:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.6651982378854626) internal successors, (756), 475 states have internal predecessors, (756), 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 22:55:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 955 transitions. [2021-11-12 22:55:33,753 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 955 transitions. Word has length 91 [2021-11-12 22:55:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:33,753 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 955 transitions. [2021-11-12 22:55:33,753 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 22:55:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 955 transitions. [2021-11-12 22:55:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:55:33,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:33,756 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 22:55:33,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:33,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:33,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:33,977 INFO L85 PathProgramCache]: Analyzing trace with hash -811976436, now seen corresponding path program 1 times [2021-11-12 22:55:33,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:33,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545605669] [2021-11-12 22:55:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:33,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:33,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:33,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:55:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:34,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:34,838 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 22:55:34,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:35,204 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 22:55:35,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:35,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545605669] [2021-11-12 22:55:35,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545605669] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:35,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:35,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 22:55:35,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853004330] [2021-11-12 22:55:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:35,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:35,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:55:35,206 INFO L87 Difference]: Start difference. First operand 583 states and 955 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 22:55:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:35,450 INFO L93 Difference]: Finished difference Result 1165 states and 1919 transitions. [2021-11-12 22:55:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:35,452 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 22:55:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:35,458 INFO L225 Difference]: With dead ends: 1165 [2021-11-12 22:55:35,458 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 22:55:35,462 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 22:55:35,463 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 148 mSDsluCounter, 4588 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5527 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:35,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5527 Invalid, 85 Unknown, 0 Unchecked, 13.67ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 167.74ms Time] [2021-11-12 22:55:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 22:55:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2021-11-12 22:55:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 470 states have (on average 1.6638297872340426) internal successors, (782), 493 states have internal predecessors, (782), 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 22:55:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 986 transitions. [2021-11-12 22:55:35,501 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 986 transitions. Word has length 92 [2021-11-12 22:55:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:35,501 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 986 transitions. [2021-11-12 22:55:35,502 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 22:55:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 986 transitions. [2021-11-12 22:55:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:55:35,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:35,504 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 22:55:35,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:35,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:35,728 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash 55075789, now seen corresponding path program 1 times [2021-11-12 22:55:35,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:35,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721365032] [2021-11-12 22:55:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:35,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:35,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:35,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:55:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:36,435 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 22:55:36,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:36,718 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 22:55:36,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:36,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721365032] [2021-11-12 22:55:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721365032] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:36,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:36,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 22:55:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226019423] [2021-11-12 22:55:36,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:36,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:36,721 INFO L87 Difference]: Start difference. First operand 602 states and 986 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 22:55:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:36,818 INFO L93 Difference]: Finished difference Result 1178 states and 1941 transitions. [2021-11-12 22:55:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:36,819 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 22:55:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:36,826 INFO L225 Difference]: With dead ends: 1178 [2021-11-12 22:55:36,826 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 22:55:36,830 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 22:55:36,831 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 8 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2813 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:36,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2813 Invalid, 30 Unknown, 0 Unchecked, 13.37ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 37.06ms Time] [2021-11-12 22:55:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 22:55:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-12 22:55:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 468 states have (on average 1.6645299145299146) internal successors, (779), 490 states have internal predecessors, (779), 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 22:55:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 979 transitions. [2021-11-12 22:55:36,862 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 979 transitions. Word has length 92 [2021-11-12 22:55:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:36,863 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 979 transitions. [2021-11-12 22:55:36,863 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 22:55:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 979 transitions. [2021-11-12 22:55:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 22:55:36,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:36,868 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 22:55:36,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:37,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,089 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 240761748, now seen corresponding path program 1 times [2021-11-12 22:55:37,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:37,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891049141] [2021-11-12 22:55:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:37,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:37,092 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:37,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:55:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:37,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:37,941 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 22:55:37,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:38,277 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 22:55:38,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:38,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891049141] [2021-11-12 22:55:38,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891049141] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:38,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:38,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:38,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940138546] [2021-11-12 22:55:38,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:38,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:38,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:38,279 INFO L87 Difference]: Start difference. First operand 598 states and 979 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 22:55:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:38,525 INFO L93 Difference]: Finished difference Result 1204 states and 1986 transitions. [2021-11-12 22:55:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:38,527 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 22:55:38,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:38,541 INFO L225 Difference]: With dead ends: 1204 [2021-11-12 22:55:38,541 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 22:55:38,545 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 22:55:38,548 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 134 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.21ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:38,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2621 Invalid, 131 Unknown, 0 Unchecked, 7.21ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 189.34ms Time] [2021-11-12 22:55:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 22:55:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-12 22:55:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 468 states have (on average 1.6538461538461537) internal successors, (774), 490 states have internal predecessors, (774), 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 22:55:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 974 transitions. [2021-11-12 22:55:38,605 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 974 transitions. Word has length 93 [2021-11-12 22:55:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:38,606 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 974 transitions. [2021-11-12 22:55:38,606 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 22:55:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 974 transitions. [2021-11-12 22:55:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-12 22:55:38,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:38,609 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 22:55:38,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:38,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:38,831 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 451885592, now seen corresponding path program 1 times [2021-11-12 22:55:38,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:38,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300442978] [2021-11-12 22:55:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:38,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:38,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:38,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:55:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:39,570 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 22:55:39,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:39,842 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 22:55:39,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:39,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300442978] [2021-11-12 22:55:39,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300442978] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:39,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:39,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:39,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985998414] [2021-11-12 22:55:39,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:39,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:39,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:39,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:39,844 INFO L87 Difference]: Start difference. First operand 598 states and 974 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 22:55:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:40,057 INFO L93 Difference]: Finished difference Result 1204 states and 1976 transitions. [2021-11-12 22:55:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:40,059 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 22:55:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:40,065 INFO L225 Difference]: With dead ends: 1204 [2021-11-12 22:55:40,065 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 22:55:40,068 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 22:55:40,069 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 128 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.18ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:40,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2621 Invalid, 121 Unknown, 0 Unchecked, 10.18ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 156.86ms Time] [2021-11-12 22:55:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 22:55:40,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2021-11-12 22:55:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 468 states have (on average 1.643162393162393) internal successors, (769), 490 states have internal predecessors, (769), 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 22:55:40,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 969 transitions. [2021-11-12 22:55:40,110 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 969 transitions. Word has length 95 [2021-11-12 22:55:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:40,111 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 969 transitions. [2021-11-12 22:55:40,111 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 22:55:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 969 transitions. [2021-11-12 22:55:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:55:40,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:40,114 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 22:55:40,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:40,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:40,332 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:40,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1580397324, now seen corresponding path program 1 times [2021-11-12 22:55:40,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:40,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341900157] [2021-11-12 22:55:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:40,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:40,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:40,334 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:40,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:55:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:41,024 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 22:55:41,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:41,338 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 22:55:41,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:41,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341900157] [2021-11-12 22:55:41,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341900157] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:41,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:41,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:41,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058907109] [2021-11-12 22:55:41,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:41,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:41,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:41,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:41,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:41,341 INFO L87 Difference]: Start difference. First operand 598 states and 969 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 22:55:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:41,557 INFO L93 Difference]: Finished difference Result 1225 states and 1997 transitions. [2021-11-12 22:55:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:41,558 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 22:55:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:41,564 INFO L225 Difference]: With dead ends: 1225 [2021-11-12 22:55:41,565 INFO L226 Difference]: Without dead ends: 628 [2021-11-12 22:55:41,570 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 22:55:41,571 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 143 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2631 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.88ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:41,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2631 Invalid, 131 Unknown, 0 Unchecked, 5.88ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 167.13ms Time] [2021-11-12 22:55:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-12 22:55:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 613. [2021-11-12 22:55:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 483 states have (on average 1.6231884057971016) internal successors, (784), 504 states have internal predecessors, (784), 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 22:55:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 983 transitions. [2021-11-12 22:55:41,599 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 983 transitions. Word has length 97 [2021-11-12 22:55:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:41,599 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 983 transitions. [2021-11-12 22:55:41,600 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 22:55:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 983 transitions. [2021-11-12 22:55:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 22:55:41,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:41,602 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 22:55:41,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:41,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:41,823 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1704271756, now seen corresponding path program 1 times [2021-11-12 22:55:41,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:41,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229719878] [2021-11-12 22:55:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:41,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:41,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:41,826 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:41,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:55:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:42,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:42,611 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 22:55:42,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:42,964 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 22:55:42,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:42,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229719878] [2021-11-12 22:55:42,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229719878] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:42,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:42,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 22:55:42,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230848835] [2021-11-12 22:55:42,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:42,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:55:42,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:55:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:55:42,966 INFO L87 Difference]: Start difference. First operand 613 states and 983 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 22:55:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:43,193 INFO L93 Difference]: Finished difference Result 1189 states and 1918 transitions. [2021-11-12 22:55:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:43,195 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 22:55:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:43,202 INFO L225 Difference]: With dead ends: 1189 [2021-11-12 22:55:43,202 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 22:55:43,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:55:43,207 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 131 mSDsluCounter, 4553 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5495 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:43,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5495 Invalid, 75 Unknown, 0 Unchecked, 11.33ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 133.71ms Time] [2021-11-12 22:55:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 22:55:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 592. [2021-11-12 22:55:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 462 states have (on average 1.6168831168831168) internal successors, (747), 483 states have internal predecessors, (747), 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 22:55:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 946 transitions. [2021-11-12 22:55:43,242 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 946 transitions. Word has length 97 [2021-11-12 22:55:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:43,243 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 946 transitions. [2021-11-12 22:55:43,243 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 22:55:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 946 transitions. [2021-11-12 22:55:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 22:55:43,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:43,247 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 22:55:43,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:43,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash 355644681, now seen corresponding path program 1 times [2021-11-12 22:55:43,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:43,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514524643] [2021-11-12 22:55:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:43,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:43,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:43,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:43,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:55:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:44,352 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 22:55:44,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:44,638 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 22:55:44,638 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:44,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514524643] [2021-11-12 22:55:44,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514524643] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:44,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:44,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:44,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997868666] [2021-11-12 22:55:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:44,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:44,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:44,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:44,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:44,639 INFO L87 Difference]: Start difference. First operand 592 states and 946 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 22:55:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:44,769 INFO L93 Difference]: Finished difference Result 1153 states and 1856 transitions. [2021-11-12 22:55:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:44,771 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 22:55:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:44,776 INFO L225 Difference]: With dead ends: 1153 [2021-11-12 22:55:44,776 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 22:55:44,780 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 22:55:44,781 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 69 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:44,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2645 Invalid, 54 Unknown, 0 Unchecked, 5.03ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 92.39ms Time] [2021-11-12 22:55:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 22:55:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 22:55:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 462 states have (on average 1.6147186147186148) internal successors, (746), 483 states have internal predecessors, (746), 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 22:55:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 945 transitions. [2021-11-12 22:55:44,805 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 945 transitions. Word has length 98 [2021-11-12 22:55:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:44,805 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 945 transitions. [2021-11-12 22:55:44,806 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 22:55:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 945 transitions. [2021-11-12 22:55:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 22:55:44,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:44,808 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 22:55:44,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:45,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:45,024 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 719581871, now seen corresponding path program 1 times [2021-11-12 22:55:45,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:45,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661594259] [2021-11-12 22:55:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:45,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:45,025 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:45,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:55:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:45,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:45,754 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 22:55:45,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:46,059 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 22:55:46,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:46,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661594259] [2021-11-12 22:55:46,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661594259] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:46,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:46,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 22:55:46,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508664766] [2021-11-12 22:55:46,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:46,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:55:46,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:46,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:55:46,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:55:46,062 INFO L87 Difference]: Start difference. First operand 592 states and 945 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 22:55:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:46,202 INFO L93 Difference]: Finished difference Result 1153 states and 1855 transitions. [2021-11-12 22:55:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:46,204 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 22:55:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:46,209 INFO L225 Difference]: With dead ends: 1153 [2021-11-12 22:55:46,210 INFO L226 Difference]: Without dead ends: 592 [2021-11-12 22:55:46,214 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 22:55:46,214 INFO L933 BasicCegarLoop]: 911 mSDtfsCounter, 67 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:46,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2645 Invalid, 52 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 101.11ms Time] [2021-11-12 22:55:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-12 22:55:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2021-11-12 22:55:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 462 states have (on average 1.6125541125541125) internal successors, (745), 483 states have internal predecessors, (745), 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 22:55:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 944 transitions. [2021-11-12 22:55:46,243 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 944 transitions. Word has length 99 [2021-11-12 22:55:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:46,244 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 944 transitions. [2021-11-12 22:55:46,244 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 22:55:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 944 transitions. [2021-11-12 22:55:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 22:55:46,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:46,246 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 22:55:46,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 22:55:46,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:46,472 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash -407089948, now seen corresponding path program 1 times [2021-11-12 22:55:46,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:46,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3011113] [2021-11-12 22:55:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:46,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:46,474 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:46,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:55:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:47,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:55:47,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:47,256 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 22:55:47,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:47,782 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 22:55:47,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:47,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3011113] [2021-11-12 22:55:47,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3011113] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:47,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:47,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:55:47,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100585386] [2021-11-12 22:55:47,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:47,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:47,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:47,785 INFO L87 Difference]: Start difference. First operand 592 states and 944 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 22:55:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:48,128 INFO L93 Difference]: Finished difference Result 1158 states and 1862 transitions. [2021-11-12 22:55:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:48,130 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 22:55:48,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:48,137 INFO L225 Difference]: With dead ends: 1158 [2021-11-12 22:55:48,137 INFO L226 Difference]: Without dead ends: 603 [2021-11-12 22:55:48,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:55:48,142 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 109 mSDsluCounter, 5252 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 214.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6138 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.63ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 238.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:48,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6138 Invalid, 152 Unknown, 0 Unchecked, 11.63ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 238.80ms Time] [2021-11-12 22:55:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-12 22:55:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 594. [2021-11-12 22:55:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 464 states have (on average 1.6077586206896552) internal successors, (746), 485 states have internal predecessors, (746), 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 22:55:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 945 transitions. [2021-11-12 22:55:48,172 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 945 transitions. Word has length 100 [2021-11-12 22:55:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:48,172 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 945 transitions. [2021-11-12 22:55:48,173 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 22:55:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 945 transitions. [2021-11-12 22:55:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:55:48,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:48,175 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 22:55:48,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:48,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:48,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1361114522, now seen corresponding path program 1 times [2021-11-12 22:55:48,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:48,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052744850] [2021-11-12 22:55:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:48,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:48,394 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:48,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:55:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:48,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:49,175 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 22:55:49,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:49,751 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 22:55:49,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:49,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052744850] [2021-11-12 22:55:49,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052744850] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:49,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:49,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 22:55:49,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186735889] [2021-11-12 22:55:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:49,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:49,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:49,754 INFO L87 Difference]: Start difference. First operand 594 states and 945 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 22:55:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:50,026 INFO L93 Difference]: Finished difference Result 1150 states and 1843 transitions. [2021-11-12 22:55:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:50,027 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 22:55:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:50,034 INFO L225 Difference]: With dead ends: 1150 [2021-11-12 22:55:50,034 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 22:55:50,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 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 22:55:50,039 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 77 mSDsluCounter, 5258 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6146 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:50,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6146 Invalid, 152 Unknown, 0 Unchecked, 8.58ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 190.99ms Time] [2021-11-12 22:55:50,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 22:55:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 596. [2021-11-12 22:55:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 466 states have (on average 1.6030042918454936) internal successors, (747), 487 states have internal predecessors, (747), 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 22:55:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 946 transitions. [2021-11-12 22:55:50,067 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 946 transitions. Word has length 101 [2021-11-12 22:55:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:50,067 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 946 transitions. [2021-11-12 22:55:50,068 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 22:55:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 946 transitions. [2021-11-12 22:55:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:55:50,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:50,070 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 22:55:50,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:50,292 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash -939847826, now seen corresponding path program 1 times [2021-11-12 22:55:50,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:50,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644560510] [2021-11-12 22:55:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:50,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:50,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:50,295 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:50,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:55:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:50,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:50,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:51,060 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 22:55:51,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:51,387 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 22:55:51,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:51,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644560510] [2021-11-12 22:55:51,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644560510] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:51,388 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:51,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:55:51,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234521516] [2021-11-12 22:55:51,388 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:51,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:55:51,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:51,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:55:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:55:51,390 INFO L87 Difference]: Start difference. First operand 596 states and 946 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 22:55:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:51,607 INFO L93 Difference]: Finished difference Result 1096 states and 1770 transitions. [2021-11-12 22:55:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:55:51,609 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 22:55:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:51,615 INFO L225 Difference]: With dead ends: 1096 [2021-11-12 22:55:51,615 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 22:55:51,619 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 22:55:51,620 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 55 mSDsluCounter, 7079 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 7979 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.39ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 158.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:51,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 7979 Invalid, 116 Unknown, 0 Unchecked, 10.39ms Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 158.31ms Time] [2021-11-12 22:55:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 22:55:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 22:55:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6100217864923747) internal successors, (739), 480 states have internal predecessors, (739), 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 22:55:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 938 transitions. [2021-11-12 22:55:51,673 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 938 transitions. Word has length 102 [2021-11-12 22:55:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:51,674 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 938 transitions. [2021-11-12 22:55:51,674 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 22:55:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 938 transitions. [2021-11-12 22:55:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:55:51,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:51,677 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 22:55:51,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:51,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:51,900 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash -519060226, now seen corresponding path program 1 times [2021-11-12 22:55:51,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:51,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515116971] [2021-11-12 22:55:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:51,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:51,904 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:51,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:55:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:52,663 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 22:55:52,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:53,018 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 22:55:53,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:53,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515116971] [2021-11-12 22:55:53,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515116971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:53,019 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:53,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:55:53,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534067437] [2021-11-12 22:55:53,019 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:53,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:55:53,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:55:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:55:53,021 INFO L87 Difference]: Start difference. First operand 589 states and 938 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 22:55:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:53,202 INFO L93 Difference]: Finished difference Result 1101 states and 1784 transitions. [2021-11-12 22:55:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:53,204 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 22:55:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:53,209 INFO L225 Difference]: With dead ends: 1101 [2021-11-12 22:55:53,209 INFO L226 Difference]: Without dead ends: 586 [2021-11-12 22:55:53,213 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 22:55:53,213 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 97 mSDsluCounter, 6140 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 7032 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.72ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:53,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 7032 Invalid, 89 Unknown, 0 Unchecked, 7.72ms Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 129.63ms Time] [2021-11-12 22:55:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-12 22:55:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-11-12 22:55:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 456 states have (on average 1.6096491228070176) internal successors, (734), 477 states have internal predecessors, (734), 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 22:55:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 933 transitions. [2021-11-12 22:55:53,237 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 933 transitions. Word has length 103 [2021-11-12 22:55:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:53,237 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 933 transitions. [2021-11-12 22:55:53,237 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 22:55:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 933 transitions. [2021-11-12 22:55:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:55:53,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:53,240 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 22:55:53,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:53,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:53,454 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash -696843906, now seen corresponding path program 1 times [2021-11-12 22:55:53,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:53,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115582164] [2021-11-12 22:55:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:53,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:53,457 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:53,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:55:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:55:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:54,149 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 22:55:54,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:54,460 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 22:55:54,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:54,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115582164] [2021-11-12 22:55:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115582164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:54,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:55:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278670512] [2021-11-12 22:55:54,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:54,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:54,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:54,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:55:54,465 INFO L87 Difference]: Start difference. First operand 586 states and 933 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 22:55:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:54,594 INFO L93 Difference]: Finished difference Result 1098 states and 1779 transitions. [2021-11-12 22:55:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:55:54,596 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 22:55:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:54,601 INFO L225 Difference]: With dead ends: 1098 [2021-11-12 22:55:54,601 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 22:55:54,604 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 22:55:54,604 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 142 mSDsluCounter, 4392 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5283 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:54,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5283 Invalid, 68 Unknown, 0 Unchecked, 5.62ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 90.49ms Time] [2021-11-12 22:55:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 22:55:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-12 22:55:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 448 states have (on average 1.6138392857142858) internal successors, (723), 469 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 22:55:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 922 transitions. [2021-11-12 22:55:54,627 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 922 transitions. Word has length 103 [2021-11-12 22:55:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:54,628 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 922 transitions. [2021-11-12 22:55:54,628 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 22:55:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 922 transitions. [2021-11-12 22:55:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 22:55:54,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:54,630 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 22:55:54,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 22:55:54,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:54,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1456661614, now seen corresponding path program 1 times [2021-11-12 22:55:54,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:54,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822477425] [2021-11-12 22:55:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:54,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:54,853 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:54,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:55:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:55,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:55:55,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:55,587 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 22:55:55,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:55,982 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 22:55:55,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:55,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822477425] [2021-11-12 22:55:55,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822477425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:55,982 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:55,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:55,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917294621] [2021-11-12 22:55:55,982 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:55,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:55,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:55,984 INFO L87 Difference]: Start difference. First operand 578 states and 922 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 22:55:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:56,183 INFO L93 Difference]: Finished difference Result 1084 states and 1757 transitions. [2021-11-12 22:55:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:56,185 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 22:55:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:56,190 INFO L225 Difference]: With dead ends: 1084 [2021-11-12 22:55:56,190 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 22:55:56,193 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 22:55:56,194 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 101 mSDsluCounter, 5246 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6133 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.78ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:56,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6133 Invalid, 114 Unknown, 0 Unchecked, 6.78ms Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 136.48ms Time] [2021-11-12 22:55:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 22:55:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-12 22:55:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 448 states have (on average 1.6116071428571428) internal successors, (722), 469 states have internal predecessors, (722), 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 22:55:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 921 transitions. [2021-11-12 22:55:56,245 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 921 transitions. Word has length 104 [2021-11-12 22:55:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:56,245 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 921 transitions. [2021-11-12 22:55:56,245 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 22:55:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 921 transitions. [2021-11-12 22:55:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 22:55:56,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:56,247 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 22:55:56,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:56,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:56,469 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash -500374532, now seen corresponding path program 1 times [2021-11-12 22:55:56,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:56,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296374635] [2021-11-12 22:55:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:56,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:56,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:56,472 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:56,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:55:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:55:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:57,289 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 22:55:57,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:57,728 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 22:55:57,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:57,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296374635] [2021-11-12 22:55:57,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296374635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:57,728 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:57,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:57,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355849332] [2021-11-12 22:55:57,729 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:57,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:57,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:57,730 INFO L87 Difference]: Start difference. First operand 578 states and 921 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 22:55:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:57,999 INFO L93 Difference]: Finished difference Result 1128 states and 1814 transitions. [2021-11-12 22:55:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:58,001 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 22:55:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:58,006 INFO L225 Difference]: With dead ends: 1128 [2021-11-12 22:55:58,006 INFO L226 Difference]: Without dead ends: 575 [2021-11-12 22:55:58,009 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 22:55:58,009 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 129 mSDsluCounter, 7792 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8667 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.45ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 185.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:58,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8667 Invalid, 145 Unknown, 0 Unchecked, 9.45ms Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 185.97ms Time] [2021-11-12 22:55:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-12 22:55:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-11-12 22:55:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 445 states have (on average 1.604494382022472) internal successors, (714), 466 states have internal predecessors, (714), 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 22:55:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 913 transitions. [2021-11-12 22:55:58,034 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 913 transitions. Word has length 105 [2021-11-12 22:55:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:58,034 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 913 transitions. [2021-11-12 22:55:58,034 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 22:55:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 913 transitions. [2021-11-12 22:55:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:55:58,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:58,036 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 22:55:58,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:58,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:58,258 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1131238039, now seen corresponding path program 1 times [2021-11-12 22:55:58,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:58,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988674696] [2021-11-12 22:55:58,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:58,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:58,260 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:58,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:55:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:55:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:58,999 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 22:55:58,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:59,423 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 22:55:59,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:59,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988674696] [2021-11-12 22:55:59,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988674696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:59,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:59,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:55:59,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227615262] [2021-11-12 22:55:59,424 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:59,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:59,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:59,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:55:59,427 INFO L87 Difference]: Start difference. First operand 575 states and 913 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 22:55:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:59,743 INFO L93 Difference]: Finished difference Result 1075 states and 1737 transitions. [2021-11-12 22:55:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:55:59,745 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 22:55:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:59,751 INFO L225 Difference]: With dead ends: 1075 [2021-11-12 22:55:59,751 INFO L226 Difference]: Without dead ends: 575 [2021-11-12 22:55:59,754 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 22:55:59,755 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 81 mSDsluCounter, 7824 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 8700 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.37ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:59,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 8700 Invalid, 161 Unknown, 0 Unchecked, 11.50ms Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 233.37ms Time] [2021-11-12 22:55:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-12 22:55:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2021-11-12 22:55:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 445 states have (on average 1.602247191011236) internal successors, (713), 466 states have internal predecessors, (713), 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 22:55:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 912 transitions. [2021-11-12 22:55:59,784 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 912 transitions. Word has length 106 [2021-11-12 22:55:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:59,784 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 912 transitions. [2021-11-12 22:55:59,785 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 22:55:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 912 transitions. [2021-11-12 22:55:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 22:55:59,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:59,787 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 22:55:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:59,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:00,000 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:00,000 INFO L85 PathProgramCache]: Analyzing trace with hash -682474867, now seen corresponding path program 1 times [2021-11-12 22:56:00,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:00,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510844673] [2021-11-12 22:56:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:00,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:00,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:00,001 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:00,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:56:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:56:00,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:00,776 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 22:56:00,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:01,151 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 22:56:01,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:01,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510844673] [2021-11-12 22:56:01,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510844673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:01,151 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:01,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:01,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544409672] [2021-11-12 22:56:01,152 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:01,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:01,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:01,153 INFO L87 Difference]: Start difference. First operand 575 states and 912 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 22:56:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:01,456 INFO L93 Difference]: Finished difference Result 1113 states and 1782 transitions. [2021-11-12 22:56:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:56:01,458 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 22:56:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:01,462 INFO L225 Difference]: With dead ends: 1113 [2021-11-12 22:56:01,463 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 22:56:01,466 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 22:56:01,466 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 87 mSDsluCounter, 8654 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 9528 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.06ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 212.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:01,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 9528 Invalid, 159 Unknown, 0 Unchecked, 9.06ms Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 212.45ms Time] [2021-11-12 22:56:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 22:56:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-12 22:56:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 442 states have (on average 1.5950226244343892) internal successors, (705), 463 states have internal predecessors, (705), 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 22:56:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 904 transitions. [2021-11-12 22:56:01,488 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 904 transitions. Word has length 107 [2021-11-12 22:56:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:01,489 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 904 transitions. [2021-11-12 22:56:01,489 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 22:56:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 904 transitions. [2021-11-12 22:56:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:56:01,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:01,491 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 22:56:01,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:01,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:01,704 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2133600348, now seen corresponding path program 1 times [2021-11-12 22:56:01,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:01,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700780557] [2021-11-12 22:56:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:01,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:01,705 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:01,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:56:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:02,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:02,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:03,031 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 22:56:03,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:03,536 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 22:56:03,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:03,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700780557] [2021-11-12 22:56:03,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700780557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:03,537 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:03,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 22:56:03,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079838219] [2021-11-12 22:56:03,538 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:03,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:56:03,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:56:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:03,539 INFO L87 Difference]: Start difference. First operand 572 states and 904 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 22:56:05,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:07,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:09,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:18,401 INFO L93 Difference]: Finished difference Result 2740 states and 4531 transitions. [2021-11-12 22:56:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:56:18,402 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 22:56:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:18,420 INFO L225 Difference]: With dead ends: 2740 [2021-11-12 22:56:18,420 INFO L226 Difference]: Without dead ends: 2248 [2021-11-12 22:56:18,424 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 22:56:18,424 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 6735 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 5152 mSolverCounterSat, 1912 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13227.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6919 SdHoareTripleChecker+Valid, 3223 SdHoareTripleChecker+Invalid, 7067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.81ms SdHoareTripleChecker+Time, 1912 IncrementalHoareTripleChecker+Valid, 5152 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14448.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:18,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6919 Valid, 3223 Invalid, 7067 Unknown, 0 Unchecked, 54.81ms Time], IncrementalHoareTripleChecker [1912 Valid, 5152 Invalid, 3 Unknown, 0 Unchecked, 14448.20ms Time] [2021-11-12 22:56:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-11-12 22:56:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2066. [2021-11-12 22:56:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 1583 states have (on average 1.6506632975363233) internal successors, (2613), 1648 states have internal predecessors, (2613), 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 22:56:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 3417 transitions. [2021-11-12 22:56:18,561 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 3417 transitions. Word has length 108 [2021-11-12 22:56:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:18,562 INFO L470 AbstractCegarLoop]: Abstraction has 2066 states and 3417 transitions. [2021-11-12 22:56:18,563 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 22:56:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 3417 transitions. [2021-11-12 22:56:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 22:56:18,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:18,570 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 22:56:18,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:18,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:18,790 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1650353043, now seen corresponding path program 1 times [2021-11-12 22:56:18,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:18,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019657349] [2021-11-12 22:56:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:18,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:18,793 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:18,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:56:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:56:19,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:19,863 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 22:56:19,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:20,528 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 22:56:20,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:20,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019657349] [2021-11-12 22:56:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019657349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:20,529 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:56:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967157820] [2021-11-12 22:56:20,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:20,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:56:20,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:56:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:56:20,531 INFO L87 Difference]: Start difference. First operand 2066 states and 3417 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 22:56:22,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:24,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:34,545 INFO L93 Difference]: Finished difference Result 5442 states and 9038 transitions. [2021-11-12 22:56:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 22:56:34,546 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 22:56:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:34,573 INFO L225 Difference]: With dead ends: 5442 [2021-11-12 22:56:34,574 INFO L226 Difference]: Without dead ends: 3456 [2021-11-12 22:56:34,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:56:34,589 INFO L933 BasicCegarLoop]: 1799 mSDtfsCounter, 3473 mSDsluCounter, 4283 mSDsCounter, 0 mSdLazyCounter, 9058 mSolverCounterSat, 1356 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12208.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3563 SdHoareTripleChecker+Valid, 6082 SdHoareTripleChecker+Invalid, 10416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.95ms SdHoareTripleChecker+Time, 1356 IncrementalHoareTripleChecker+Valid, 9058 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13449.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:34,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3563 Valid, 6082 Invalid, 10416 Unknown, 0 Unchecked, 57.95ms Time], IncrementalHoareTripleChecker [1356 Valid, 9058 Invalid, 2 Unknown, 0 Unchecked, 13449.52ms Time] [2021-11-12 22:56:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2021-11-12 22:56:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 2990. [2021-11-12 22:56:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2235 states have (on average 1.6134228187919464) internal successors, (3606), 2326 states have internal predecessors, (3606), 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 22:56:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 4890 transitions. [2021-11-12 22:56:34,821 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 4890 transitions. Word has length 160 [2021-11-12 22:56:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:34,822 INFO L470 AbstractCegarLoop]: Abstraction has 2990 states and 4890 transitions. [2021-11-12 22:56:34,822 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 22:56:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 4890 transitions. [2021-11-12 22:56:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 22:56:34,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:34,829 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 22:56:34,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:35,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:35,051 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash -977057793, now seen corresponding path program 1 times [2021-11-12 22:56:35,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:35,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090165525] [2021-11-12 22:56:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:35,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:35,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:35,054 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:35,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:56:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:35,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:36,154 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 22:56:36,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:36,819 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 22:56:36,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:36,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090165525] [2021-11-12 22:56:36,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090165525] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:36,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:36,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:56:36,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314549537] [2021-11-12 22:56:36,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:36,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:36,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:36,821 INFO L87 Difference]: Start difference. First operand 2990 states and 4890 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 22:56:38,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:40,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:41,712 INFO L93 Difference]: Finished difference Result 5940 states and 9921 transitions. [2021-11-12 22:56:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:41,713 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 22:56:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:41,737 INFO L225 Difference]: With dead ends: 5940 [2021-11-12 22:56:41,737 INFO L226 Difference]: Without dead ends: 3030 [2021-11-12 22:56:41,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:41,759 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 808 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4644.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.80ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4753.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:41,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 2214 Invalid, 461 Unknown, 0 Unchecked, 6.80ms Time], IncrementalHoareTripleChecker [16 Valid, 443 Invalid, 2 Unknown, 0 Unchecked, 4753.28ms Time] [2021-11-12 22:56:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-11-12 22:56:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 3030. [2021-11-12 22:56:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 2265 states have (on average 1.6052980132450332) internal successors, (3636), 2356 states have internal predecessors, (3636), 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 22:56:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 4926 transitions. [2021-11-12 22:56:41,994 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 4926 transitions. Word has length 161 [2021-11-12 22:56:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:41,994 INFO L470 AbstractCegarLoop]: Abstraction has 3030 states and 4926 transitions. [2021-11-12 22:56:41,995 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 22:56:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 4926 transitions. [2021-11-12 22:56:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 22:56:42,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:42,001 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 22:56:42,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:42,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:42,224 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash 61818361, now seen corresponding path program 1 times [2021-11-12 22:56:42,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:42,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922210163] [2021-11-12 22:56:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:42,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:42,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:42,226 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:56:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:43,266 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 22:56:43,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:43,859 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 22:56:43,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:43,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922210163] [2021-11-12 22:56:43,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922210163] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:43,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:43,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:56:43,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502265509] [2021-11-12 22:56:43,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:43,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:43,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:43,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:43,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:43,861 INFO L87 Difference]: Start difference. First operand 3030 states and 4926 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 22:56:45,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:47,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:48,836 INFO L93 Difference]: Finished difference Result 6030 states and 9993 transitions. [2021-11-12 22:56:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:48,837 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 22:56:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:48,864 INFO L225 Difference]: With dead ends: 6030 [2021-11-12 22:56:48,864 INFO L226 Difference]: Without dead ends: 3080 [2021-11-12 22:56:48,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:48,878 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 809 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4681.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.20ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4789.11ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:48,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 2215 Invalid, 463 Unknown, 0 Unchecked, 5.20ms Time], IncrementalHoareTripleChecker [14 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 4789.11ms Time] [2021-11-12 22:56:48,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-11-12 22:56:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 3080. [2021-11-12 22:56:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 2305 states have (on average 1.5947939262472886) internal successors, (3676), 2396 states have internal predecessors, (3676), 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 22:56:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4972 transitions. [2021-11-12 22:56:49,081 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4972 transitions. Word has length 163 [2021-11-12 22:56:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:49,082 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 4972 transitions. [2021-11-12 22:56:49,082 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 22:56:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4972 transitions. [2021-11-12 22:56:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:56:49,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:49,090 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 22:56:49,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:49,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:49,312 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:49,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1482898305, now seen corresponding path program 1 times [2021-11-12 22:56:49,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:49,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66099521] [2021-11-12 22:56:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:49,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:49,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:49,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:49,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:56:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:50,328 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 22:56:50,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:50,971 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 22:56:50,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:50,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66099521] [2021-11-12 22:56:50,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66099521] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:50,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:50,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:56:50,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6397115] [2021-11-12 22:56:50,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:50,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:50,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:50,974 INFO L87 Difference]: Start difference. First operand 3080 states and 4972 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 22:56:53,011 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:55,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:55,992 INFO L93 Difference]: Finished difference Result 6140 states and 10085 transitions. [2021-11-12 22:56:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:56:55,993 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 22:56:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:56,014 INFO L225 Difference]: With dead ends: 6140 [2021-11-12 22:56:56,014 INFO L226 Difference]: Without dead ends: 3140 [2021-11-12 22:56:56,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:56:56,028 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 806 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4723.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.47ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4868.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:56,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 2215 Invalid, 462 Unknown, 0 Unchecked, 5.47ms Time], IncrementalHoareTripleChecker [12 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 4868.43ms Time] [2021-11-12 22:56:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-11-12 22:56:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2021-11-12 22:56:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2355 states have (on average 1.5821656050955415) internal successors, (3726), 2446 states have internal predecessors, (3726), 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 22:56:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 5028 transitions. [2021-11-12 22:56:56,222 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 5028 transitions. Word has length 165 [2021-11-12 22:56:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:56,222 INFO L470 AbstractCegarLoop]: Abstraction has 3140 states and 5028 transitions. [2021-11-12 22:56:56,223 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 22:56:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 5028 transitions. [2021-11-12 22:56:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-12 22:56:56,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:56,228 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 22:56:56,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:56,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:56,452 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1683405681, now seen corresponding path program 1 times [2021-11-12 22:56:56,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:56,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878537321] [2021-11-12 22:56:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:56,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:56,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:56,454 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:56,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:56:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:56:57,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:57,520 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 22:56:57,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:58,366 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 22:56:58,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:58,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878537321] [2021-11-12 22:56:58,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878537321] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:58,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:56:58,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 22:56:58,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673214455] [2021-11-12 22:56:58,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:58,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:58,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:58,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:56:58,368 INFO L87 Difference]: Start difference. First operand 3140 states and 5028 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 22:57:00,400 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:02,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:03,349 INFO L93 Difference]: Finished difference Result 6270 states and 10197 transitions. [2021-11-12 22:57:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:03,350 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 22:57:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:03,363 INFO L225 Difference]: With dead ends: 6270 [2021-11-12 22:57:03,363 INFO L226 Difference]: Without dead ends: 3210 [2021-11-12 22:57:03,375 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 22:57:03,376 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 809 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4721.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 2215 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.69ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4837.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:03,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 2215 Invalid, 461 Unknown, 0 Unchecked, 5.69ms Time], IncrementalHoareTripleChecker [10 Valid, 449 Invalid, 2 Unknown, 0 Unchecked, 4837.53ms Time] [2021-11-12 22:57:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-11-12 22:57:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3210. [2021-11-12 22:57:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 2415 states have (on average 1.5677018633540372) internal successors, (3786), 2506 states have internal predecessors, (3786), 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 22:57:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 5094 transitions. [2021-11-12 22:57:03,615 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 5094 transitions. Word has length 167 [2021-11-12 22:57:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:03,615 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 5094 transitions. [2021-11-12 22:57:03,615 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 22:57:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 5094 transitions. [2021-11-12 22:57:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 22:57:03,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:03,620 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 22:57:03,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:03,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:03,844 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash -940200193, now seen corresponding path program 1 times [2021-11-12 22:57:03,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:03,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41857468] [2021-11-12 22:57:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:03,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:03,846 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:03,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:57:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:57:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:05,106 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 22:57:05,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:06,413 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 22:57:06,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:06,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41857468] [2021-11-12 22:57:06,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41857468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:06,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2029397683] [2021-11-12 22:57:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:06,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:06,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:57:06,421 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:57:06,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:57:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:07,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:57:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:07,499 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 22:57:07,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:08,362 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 22:57:08,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2029397683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:08,362 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:57:08,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 22:57:08,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636361671] [2021-11-12 22:57:08,363 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:08,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:57:08,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:08,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:57:08,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:57:08,364 INFO L87 Difference]: Start difference. First operand 3210 states and 5094 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 22:57:10,384 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:11,173 INFO L93 Difference]: Finished difference Result 6291 states and 10052 transitions. [2021-11-12 22:57:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:57:11,174 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 22:57:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:11,224 INFO L225 Difference]: With dead ends: 6291 [2021-11-12 22:57:11,224 INFO L226 Difference]: Without dead ends: 3161 [2021-11-12 22:57:11,233 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 22:57:11,234 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 1943 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 551 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2511.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1943 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.51ms SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2642.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:11,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1943 Valid, 799 Invalid, 655 Unknown, 0 Unchecked, 5.51ms Time], IncrementalHoareTripleChecker [551 Valid, 103 Invalid, 1 Unknown, 0 Unchecked, 2642.32ms Time] [2021-11-12 22:57:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-11-12 22:57:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3161. [2021-11-12 22:57:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 2383 states have (on average 1.561477129668485) internal successors, (3721), 2473 states have internal predecessors, (3721), 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 22:57:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4996 transitions. [2021-11-12 22:57:11,416 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4996 transitions. Word has length 169 [2021-11-12 22:57:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:11,417 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 4996 transitions. [2021-11-12 22:57:11,417 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 22:57:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4996 transitions. [2021-11-12 22:57:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 22:57:11,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:11,422 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 22:57:11,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:11,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:11,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:11,845 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash 918278597, now seen corresponding path program 1 times [2021-11-12 22:57:11,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:11,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114316839] [2021-11-12 22:57:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:11,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:11,848 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:11,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:57:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:12,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:57:12,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:13,317 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 22:57:13,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:14,691 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 22:57:14,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:14,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114316839] [2021-11-12 22:57:14,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114316839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:14,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864031755] [2021-11-12 22:57:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:14,692 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:14,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:57:14,702 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:57:14,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 22:57:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:57:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:15,708 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 22:57:15,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:16,881 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 22:57:16,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864031755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:16,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568644469] [2021-11-12 22:57:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:16,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:57:16,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:57:16,883 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:57:16,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-12 22:57:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:17,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:57:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:17,666 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 22:57:17,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:18,924 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 22:57:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568644469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:18,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:57:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 22:57:18,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208484300] [2021-11-12 22:57:18,926 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:57:18,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:57:18,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:57:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:57:18,927 INFO L87 Difference]: Start difference. First operand 3161 states and 4996 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 22:57:20,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:22,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:24,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:26,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:28,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:30,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:41,569 INFO L93 Difference]: Finished difference Result 10916 states and 17787 transitions. [2021-11-12 22:57:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:57:41,573 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 22:57:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:41,624 INFO L225 Difference]: With dead ends: 10916 [2021-11-12 22:57:41,625 INFO L226 Difference]: Without dead ends: 7835 [2021-11-12 22:57:41,643 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 22:57:41,644 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 4533 mSDsluCounter, 4464 mSDsCounter, 0 mSdLazyCounter, 8543 mSolverCounterSat, 1751 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20605.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4612 SdHoareTripleChecker+Valid, 6166 SdHoareTripleChecker+Invalid, 10300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.35ms SdHoareTripleChecker+Time, 1751 IncrementalHoareTripleChecker+Valid, 8543 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21852.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:41,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4612 Valid, 6166 Invalid, 10300 Unknown, 0 Unchecked, 50.35ms Time], IncrementalHoareTripleChecker [1751 Valid, 8543 Invalid, 6 Unknown, 0 Unchecked, 21852.01ms Time] [2021-11-12 22:57:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7835 states. [2021-11-12 22:57:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7835 to 7024. [2021-11-12 22:57:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7024 states, 5235 states have (on average 1.560458452722063) internal successors, (8169), 5429 states have internal predecessors, (8169), 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 22:57:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7024 states to 7024 states and 11286 transitions. [2021-11-12 22:57:42,347 INFO L78 Accepts]: Start accepts. Automaton has 7024 states and 11286 transitions. Word has length 170 [2021-11-12 22:57:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:42,348 INFO L470 AbstractCegarLoop]: Abstraction has 7024 states and 11286 transitions. [2021-11-12 22:57:42,348 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 22:57:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7024 states and 11286 transitions. [2021-11-12 22:57:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 22:57:42,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:42,358 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 22:57:42,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:42,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:42,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-12 22:57:42,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:57:42,977 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash -441118518, now seen corresponding path program 1 times [2021-11-12 22:57:42,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:42,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364058930] [2021-11-12 22:57:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:42,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:42,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:42,979 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:42,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 22:57:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:57:43,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:57:43,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 22:57:44,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:44,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364058930] [2021-11-12 22:57:44,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364058930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:44,566 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:44,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 22:57:44,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860703456] [2021-11-12 22:57:44,566 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:44,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:57:44,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:44,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:57:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:57:44,568 INFO L87 Difference]: Start difference. First operand 7024 states and 11286 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 22:57:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:44,961 INFO L93 Difference]: Finished difference Result 10083 states and 16148 transitions. [2021-11-12 22:57:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:57:44,962 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 22:57:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:44,982 INFO L225 Difference]: With dead ends: 10083 [2021-11-12 22:57:44,982 INFO L226 Difference]: Without dead ends: 3129 [2021-11-12 22:57:45,003 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 22:57:45,004 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 105 mSDsluCounter, 5089 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 5946 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.72ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:45,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 5946 Invalid, 101 Unknown, 0 Unchecked, 5.72ms Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 152.15ms Time] [2021-11-12 22:57:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-11-12 22:57:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3129. [2021-11-12 22:57:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2363 states have (on average 1.5598815065594582) internal successors, (3686), 2453 states have internal predecessors, (3686), 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 22:57:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4937 transitions. [2021-11-12 22:57:45,239 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4937 transitions. Word has length 172 [2021-11-12 22:57:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:45,239 INFO L470 AbstractCegarLoop]: Abstraction has 3129 states and 4937 transitions. [2021-11-12 22:57:45,239 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 22:57:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4937 transitions. [2021-11-12 22:57:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 22:57:45,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:45,244 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 22:57:45,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:45,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:45,460 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:45,460 INFO L85 PathProgramCache]: Analyzing trace with hash 412913219, now seen corresponding path program 1 times [2021-11-12 22:57:45,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:45,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558884723] [2021-11-12 22:57:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:45,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:45,462 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:45,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 22:57:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:57:46,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:46,720 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 22:57:46,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:48,062 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 22:57:48,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:48,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558884723] [2021-11-12 22:57:48,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558884723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:48,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135943114] [2021-11-12 22:57:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:48,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:57:48,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:57:48,063 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:57:48,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 22:57:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:48,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:57:48,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:49,112 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 22:57:49,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:50,310 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 22:57:50,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2135943114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:50,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479506947] [2021-11-12 22:57:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:50,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:57:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:57:50,312 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:57:50,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-12 22:57:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:50,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:57:50,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:51,163 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 22:57:51,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:52,325 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 22:57:52,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479506947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:52,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:57:52,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 22:57:52,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850154421] [2021-11-12 22:57:52,327 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:57:52,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:57:52,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:57:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:57:52,330 INFO L87 Difference]: Start difference. First operand 3129 states and 4937 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 22:57:54,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:56,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:57:58,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:00,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:02,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:04,381 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:06,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:10,619 INFO L93 Difference]: Finished difference Result 6224 states and 9922 transitions. [2021-11-12 22:58:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:58:10,621 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 22:58:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:10,632 INFO L225 Difference]: With dead ends: 6224 [2021-11-12 22:58:10,632 INFO L226 Difference]: Without dead ends: 3173 [2021-11-12 22:58:10,639 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 22:58:10,639 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1322 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 4049 mSolverCounterSat, 374 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17444.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 4430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.18ms SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 4049 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17974.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:10,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 2918 Invalid, 4430 Unknown, 0 Unchecked, 21.18ms Time], IncrementalHoareTripleChecker [374 Valid, 4049 Invalid, 7 Unknown, 0 Unchecked, 17974.12ms Time] [2021-11-12 22:58:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2021-11-12 22:58:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 3153. [2021-11-12 22:58:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 2381 states have (on average 1.5556488870222596) internal successors, (3704), 2471 states have internal predecessors, (3704), 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 22:58:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 4979 transitions. [2021-11-12 22:58:10,850 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 4979 transitions. Word has length 176 [2021-11-12 22:58:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:10,850 INFO L470 AbstractCegarLoop]: Abstraction has 3153 states and 4979 transitions. [2021-11-12 22:58:10,851 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 22:58:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 4979 transitions. [2021-11-12 22:58:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 22:58:10,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:10,855 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 22:58:10,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:11,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:11,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:11,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:11,480 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash -735986178, now seen corresponding path program 1 times [2021-11-12 22:58:11,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:11,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473888957] [2021-11-12 22:58:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:11,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:11,484 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:11,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-12 22:58:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:12,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:58:12,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:12,776 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 22:58:12,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:13,528 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 22:58:13,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:13,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473888957] [2021-11-12 22:58:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473888957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:58:13,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1029052123] [2021-11-12 22:58:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:13,529 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:58:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:58:13,534 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:58:13,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-12 22:58:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:13,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:58:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:14,389 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 22:58:14,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:15,156 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 22:58:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1029052123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:58:15,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631996735] [2021-11-12 22:58:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:15,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:58:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:58:15,157 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:58:15,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-12 22:58:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:15,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:58:15,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:15,910 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 22:58:15,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:16,666 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 22:58:16,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631996735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:58:16,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:58:16,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 22:58:16,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500002416] [2021-11-12 22:58:16,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:58:16,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:58:16,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:16,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:58:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:58:16,669 INFO L87 Difference]: Start difference. First operand 3153 states and 4979 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 22:58:18,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:20,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:22,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:30,545 INFO L93 Difference]: Finished difference Result 10958 states and 17468 transitions. [2021-11-12 22:58:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:58:30,546 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 22:58:30,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:30,580 INFO L225 Difference]: With dead ends: 10958 [2021-11-12 22:58:30,581 INFO L226 Difference]: Without dead ends: 7871 [2021-11-12 22:58:30,593 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 22:58:30,593 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 3960 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 5630 mSolverCounterSat, 1151 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12211.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4042 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 6784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.98ms SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 5630 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13156.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:30,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4042 Valid, 3778 Invalid, 6784 Unknown, 0 Unchecked, 37.98ms Time], IncrementalHoareTripleChecker [1151 Valid, 5630 Invalid, 3 Unknown, 0 Unchecked, 13156.15ms Time] [2021-11-12 22:58:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-11-12 22:58:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 7819. [2021-11-12 22:58:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7819 states, 5919 states have (on average 1.5306639635073491) internal successors, (9060), 6125 states have internal predecessors, (9060), 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 22:58:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 12217 transitions. [2021-11-12 22:58:31,280 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 12217 transitions. Word has length 177 [2021-11-12 22:58:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:31,280 INFO L470 AbstractCegarLoop]: Abstraction has 7819 states and 12217 transitions. [2021-11-12 22:58:31,281 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 22:58:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 12217 transitions. [2021-11-12 22:58:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 22:58:31,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:31,285 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 22:58:31,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:31,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:31,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:31,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:58:31,899 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:31,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1225495231, now seen corresponding path program 1 times [2021-11-12 22:58:31,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:31,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514485911] [2021-11-12 22:58:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:31,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:31,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:31,901 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:31,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 22:58:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:58:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:33,115 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 22:58:33,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:33,933 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 22:58:33,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:33,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514485911] [2021-11-12 22:58:33,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514485911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:33,933 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:33,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:58:33,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578172786] [2021-11-12 22:58:33,934 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:33,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:58:33,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:58:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:58:33,935 INFO L87 Difference]: Start difference. First operand 7819 states and 12217 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 22:58:35,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:37,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:46,010 INFO L93 Difference]: Finished difference Result 22592 states and 36507 transitions. [2021-11-12 22:58:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:58:46,012 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 22:58:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:46,107 INFO L225 Difference]: With dead ends: 22592 [2021-11-12 22:58:46,107 INFO L226 Difference]: Without dead ends: 14845 [2021-11-12 22:58:46,150 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 22:58:46,151 INFO L933 BasicCegarLoop]: 1716 mSDtfsCounter, 5396 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 1835 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9991.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5492 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 6664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.34ms SdHoareTripleChecker+Time, 1835 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10900.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:46,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5492 Valid, 3663 Invalid, 6664 Unknown, 0 Unchecked, 40.34ms Time], IncrementalHoareTripleChecker [1835 Valid, 4827 Invalid, 2 Unknown, 0 Unchecked, 10900.38ms Time] [2021-11-12 22:58:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14845 states. [2021-11-12 22:58:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14845 to 13755. [2021-11-12 22:58:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13755 states, 10124 states have (on average 1.5307190833662585) internal successors, (15497), 10601 states have internal predecessors, (15497), 2858 states have call successors, (2858), 651 states have call predecessors, (2858), 772 states have return successors, (3555), 2768 states have call predecessors, (3555), 2854 states have call successors, (3555) [2021-11-12 22:58:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13755 states to 13755 states and 21910 transitions. [2021-11-12 22:58:47,470 INFO L78 Accepts]: Start accepts. Automaton has 13755 states and 21910 transitions. Word has length 179 [2021-11-12 22:58:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:47,471 INFO L470 AbstractCegarLoop]: Abstraction has 13755 states and 21910 transitions. [2021-11-12 22:58:47,471 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 22:58:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 13755 states and 21910 transitions. [2021-11-12 22:58:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 22:58:47,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:47,477 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 22:58:47,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:47,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:47,700 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1287972130, now seen corresponding path program 1 times [2021-11-12 22:58:47,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:47,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891234921] [2021-11-12 22:58:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:47,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:47,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:47,703 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:47,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 22:58:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:58:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:49,147 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 22:58:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:50,061 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 22:58:50,061 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:50,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891234921] [2021-11-12 22:58:50,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891234921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:50,062 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:50,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 22:58:50,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974048137] [2021-11-12 22:58:50,062 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:50,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:58:50,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:58:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:58:50,063 INFO L87 Difference]: Start difference. First operand 13755 states and 21910 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 22:58:52,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:58:54,089 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:02,315 INFO L93 Difference]: Finished difference Result 41319 states and 67271 transitions. [2021-11-12 22:59:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:59:02,316 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 22:59:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:02,455 INFO L225 Difference]: With dead ends: 41319 [2021-11-12 22:59:02,455 INFO L226 Difference]: Without dead ends: 29518 [2021-11-12 22:59:02,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:59:02,601 INFO L933 BasicCegarLoop]: 1038 mSDtfsCounter, 4569 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 4628 mSolverCounterSat, 1138 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9290.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4642 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 5768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.47ms SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 4628 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10095.71ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:02,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4642 Valid, 2877 Invalid, 5768 Unknown, 0 Unchecked, 34.47ms Time], IncrementalHoareTripleChecker [1138 Valid, 4628 Invalid, 2 Unknown, 0 Unchecked, 10095.71ms Time] [2021-11-12 22:59:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29518 states. [2021-11-12 22:59:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29518 to 28065. [2021-11-12 22:59:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28065 states, 20658 states have (on average 1.5296737341465776) internal successors, (31600), 21680 states have internal predecessors, (31600), 5713 states have call successors, (5713), 1260 states have call predecessors, (5713), 1693 states have return successors, (7854), 5618 states have call predecessors, (7854), 5709 states have call successors, (7854) [2021-11-12 22:59:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28065 states to 28065 states and 45167 transitions. [2021-11-12 22:59:05,069 INFO L78 Accepts]: Start accepts. Automaton has 28065 states and 45167 transitions. Word has length 179 [2021-11-12 22:59:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:05,070 INFO L470 AbstractCegarLoop]: Abstraction has 28065 states and 45167 transitions. [2021-11-12 22:59:05,070 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 22:59:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 28065 states and 45167 transitions. [2021-11-12 22:59:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-12 22:59:05,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:05,076 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 22:59:05,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-12 22:59:05,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:05,297 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash -671897570, now seen corresponding path program 1 times [2021-11-12 22:59:05,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:05,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85192415] [2021-11-12 22:59:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:05,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:05,300 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 22:59:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:59:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:06,478 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 22:59:06,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:07,989 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 22:59:07,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:07,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85192415] [2021-11-12 22:59:07,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85192415] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:07,990 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:07,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 22:59:07,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354853445] [2021-11-12 22:59:07,991 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:07,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:59:07,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:59:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:59:07,993 INFO L87 Difference]: Start difference. First operand 28065 states and 45167 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 22:59:10,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:12,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:14,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:16,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:18,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:20,053 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:22,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:24,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:30,802 INFO L93 Difference]: Finished difference Result 53963 states and 87681 transitions. [2021-11-12 22:59:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:59:30,802 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 22:59:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:30,934 INFO L225 Difference]: With dead ends: 53963 [2021-11-12 22:59:30,935 INFO L226 Difference]: Without dead ends: 27852 [2021-11-12 22:59:31,017 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 22:59:31,018 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 2049 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 4284 mSolverCounterSat, 554 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19862.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2049 SdHoareTripleChecker+Valid, 3219 SdHoareTripleChecker+Invalid, 4846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.35ms SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 4284 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20438.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:31,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2049 Valid, 3219 Invalid, 4846 Unknown, 0 Unchecked, 24.35ms Time], IncrementalHoareTripleChecker [554 Valid, 4284 Invalid, 8 Unknown, 0 Unchecked, 20438.44ms Time] [2021-11-12 22:59:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27852 states. [2021-11-12 22:59:32,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27852 to 27852. [2021-11-12 22:59:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27852 states, 20541 states have (on average 1.5299157781996982) internal successors, (31426), 21545 states have internal predecessors, (31426), 5656 states have call successors, (5656), 1239 states have call predecessors, (5656), 1654 states have return successors, (7761), 5561 states have call predecessors, (7761), 5652 states have call successors, (7761) [2021-11-12 22:59:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27852 states to 27852 states and 44843 transitions. [2021-11-12 22:59:33,156 INFO L78 Accepts]: Start accepts. Automaton has 27852 states and 44843 transitions. Word has length 181 [2021-11-12 22:59:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:33,157 INFO L470 AbstractCegarLoop]: Abstraction has 27852 states and 44843 transitions. [2021-11-12 22:59:33,158 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 22:59:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 27852 states and 44843 transitions. [2021-11-12 22:59:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 22:59:33,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:33,162 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 22:59:33,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-12 22:59:33,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:59:33,363 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:59:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:33,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2141526877, now seen corresponding path program 1 times [2021-11-12 22:59:33,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:33,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882986001] [2021-11-12 22:59:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:33,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:33,368 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:33,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 22:59:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:59:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:34,730 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 22:59:34,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:35,997 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 22:59:35,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:35,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882986001] [2021-11-12 22:59:35,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882986001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:35,998 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:59:35,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 22:59:35,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960059271] [2021-11-12 22:59:35,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:35,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:59:35,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:59:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:59:36,000 INFO L87 Difference]: Start difference. First operand 27852 states and 44843 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 22:59:38,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:40,040 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:42,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:44,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:59:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:56,862 INFO L93 Difference]: Finished difference Result 76707 states and 124594 transitions. [2021-11-12 22:59:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:59:56,863 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 22:59:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:57,144 INFO L225 Difference]: With dead ends: 76707 [2021-11-12 22:59:57,144 INFO L226 Difference]: Without dead ends: 50104 [2021-11-12 22:59:57,250 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 22:59:57,250 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 3810 mSDsluCounter, 2283 mSDsCounter, 0 mSdLazyCounter, 6526 mSolverCounterSat, 1063 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15729.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3887 SdHoareTripleChecker+Valid, 3263 SdHoareTripleChecker+Invalid, 7593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.56ms SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 6526 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16872.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:57,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3887 Valid, 3263 Invalid, 7593 Unknown, 0 Unchecked, 47.56ms Time], IncrementalHoareTripleChecker [1063 Valid, 6526 Invalid, 4 Unknown, 0 Unchecked, 16872.23ms Time] [2021-11-12 22:59:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50104 states. [2021-11-12 23:00:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50104 to 49306. [2021-11-12 23:00:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49306 states, 36021 states have (on average 1.511923600122151) internal successors, (54461), 37910 states have internal predecessors, (54461), 10281 states have call successors, (10281), 2291 states have call predecessors, (10281), 3003 states have return successors, (14284), 10054 states have call predecessors, (14284), 10277 states have call successors, (14284) [2021-11-12 23:00:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49306 states to 49306 states and 79026 transitions. [2021-11-12 23:00:01,403 INFO L78 Accepts]: Start accepts. Automaton has 49306 states and 79026 transitions. Word has length 184 [2021-11-12 23:00:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:01,403 INFO L470 AbstractCegarLoop]: Abstraction has 49306 states and 79026 transitions. [2021-11-12 23:00:01,404 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 23:00:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 49306 states and 79026 transitions. [2021-11-12 23:00:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 23:00:01,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:01,407 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 23:00:01,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:01,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:01,608 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -257841439, now seen corresponding path program 1 times [2021-11-12 23:00:01,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:01,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137512849] [2021-11-12 23:00:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:01,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:01,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:01,610 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:01,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:00:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:00:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:02,675 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 23:00:02,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:03,295 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 23:00:03,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:03,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137512849] [2021-11-12 23:00:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137512849] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:03,296 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:03,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:00:03,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45100320] [2021-11-12 23:00:03,296 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:03,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:00:03,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:03,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:00:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:00:03,297 INFO L87 Difference]: Start difference. First operand 49306 states and 79026 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 23:00:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:07,650 INFO L93 Difference]: Finished difference Result 99493 states and 161808 transitions. [2021-11-12 23:00:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:00:07,651 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 23:00:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:08,303 INFO L225 Difference]: With dead ends: 99493 [2021-11-12 23:00:08,303 INFO L226 Difference]: Without dead ends: 49306 [2021-11-12 23:00:08,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:00:08,547 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 662 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 3258 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:08,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 3258 Invalid, 148 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [60 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 108.19ms Time] [2021-11-12 23:00:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49306 states. [2021-11-12 23:00:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49306 to 49306. [2021-11-12 23:00:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49306 states, 36021 states have (on average 1.4970989145220843) internal successors, (53927), 37910 states have internal predecessors, (53927), 10281 states have call successors, (10281), 2291 states have call predecessors, (10281), 3003 states have return successors, (14284), 10054 states have call predecessors, (14284), 10277 states have call successors, (14284) [2021-11-12 23:00:12,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49306 states to 49306 states and 78492 transitions. [2021-11-12 23:00:12,822 INFO L78 Accepts]: Start accepts. Automaton has 49306 states and 78492 transitions. Word has length 191 [2021-11-12 23:00:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:12,822 INFO L470 AbstractCegarLoop]: Abstraction has 49306 states and 78492 transitions. [2021-11-12 23:00:12,823 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 23:00:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 49306 states and 78492 transitions. [2021-11-12 23:00:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 23:00:12,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:12,828 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 23:00:12,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:13,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:13,032 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2036190020, now seen corresponding path program 1 times [2021-11-12 23:00:13,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:13,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380209608] [2021-11-12 23:00:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:13,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:13,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:13,034 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 23:00:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 23:00:13,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:14,261 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 23:00:14,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:15,161 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 23:00:15,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380209608] [2021-11-12 23:00:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380209608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:15,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:15,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:00:15,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751857261] [2021-11-12 23:00:15,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:15,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:00:15,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:00:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:00:15,163 INFO L87 Difference]: Start difference. First operand 49306 states and 78492 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 23:00:17,188 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 23:00:19,194 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 23:00:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:28,972 INFO L93 Difference]: Finished difference Result 101451 states and 163294 transitions. [2021-11-12 23:00:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:00:28,973 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 23:00:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:29,291 INFO L225 Difference]: With dead ends: 101451 [2021-11-12 23:00:29,291 INFO L226 Difference]: Without dead ends: 54349 [2021-11-12 23:00:29,440 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 23:00:29,441 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 4028 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 1119 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8108.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 4082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.54ms SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8822.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:29,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 2092 Invalid, 4082 Unknown, 0 Unchecked, 33.54ms Time], IncrementalHoareTripleChecker [1119 Valid, 2961 Invalid, 2 Unknown, 0 Unchecked, 8822.13ms Time] [2021-11-12 23:00:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54349 states. [2021-11-12 23:00:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54349 to 50980. [2021-11-12 23:00:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50980 states, 37263 states have (on average 1.4906743955129753) internal successors, (55547), 39242 states have internal predecessors, (55547), 10452 states have call successors, (10452), 2453 states have call predecessors, (10452), 3264 states have return successors, (14725), 10234 states have call predecessors, (14725), 10448 states have call successors, (14725) [2021-11-12 23:00:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50980 states to 50980 states and 80724 transitions. [2021-11-12 23:00:33,889 INFO L78 Accepts]: Start accepts. Automaton has 50980 states and 80724 transitions. Word has length 196 [2021-11-12 23:00:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:33,890 INFO L470 AbstractCegarLoop]: Abstraction has 50980 states and 80724 transitions. [2021-11-12 23:00:33,890 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 23:00:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50980 states and 80724 transitions. [2021-11-12 23:00:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-12 23:00:33,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:00:33,897 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 23:00:33,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-12 23:00:34,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:00:34,112 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:00:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:00:34,113 INFO L85 PathProgramCache]: Analyzing trace with hash 839400080, now seen corresponding path program 1 times [2021-11-12 23:00:34,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:00:34,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683427110] [2021-11-12 23:00:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:00:34,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:00:34,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:00:34,114 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:00:34,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da3f38e0-8ced-47b6-a43d-871c9cb2b4e7/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-12 23:00:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:00:34,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 23:00:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:35,352 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 23:00:35,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:36,494 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 23:00:36,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:36,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683427110] [2021-11-12 23:00:36,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683427110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:00:36,495 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:00:36,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:00:36,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880048795] [2021-11-12 23:00:36,495 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:00:36,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:00:36,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:00:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:00:36,496 INFO L87 Difference]: Start difference. First operand 50980 states and 80724 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 23:00:38,519 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 23:00:40,526 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 23:00:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:57,966 INFO L93 Difference]: Finished difference Result 139654 states and 224680 transitions. [2021-11-12 23:00:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:00:57,967 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 23:00:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:58,545 INFO L225 Difference]: With dead ends: 139654 [2021-11-12 23:00:58,546 INFO L226 Difference]: Without dead ends: 90856 [2021-11-12 23:00:58,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:00:58,764 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 3946 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 6992 mSolverCounterSat, 1120 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12427.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4020 SdHoareTripleChecker+Valid, 3229 SdHoareTripleChecker+Invalid, 8114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.28ms SdHoareTripleChecker+Time, 1120 IncrementalHoareTripleChecker+Valid, 6992 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13639.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:58,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4020 Valid, 3229 Invalid, 8114 Unknown, 0 Unchecked, 50.28ms Time], IncrementalHoareTripleChecker [1120 Valid, 6992 Invalid, 2 Unknown, 0 Unchecked, 13639.27ms Time] [2021-11-12 23:00:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90856 states.