./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs --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 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:33:50,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:33:50,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:33:50,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:33:50,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:33:50,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:33:50,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:33:50,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:33:50,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:33:50,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:33:50,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:33:50,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:33:50,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:33:50,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:33:50,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:33:50,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:33:50,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:33:50,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:33:50,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:33:50,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:33:50,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:33:50,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:33:50,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:33:50,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:33:50,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:33:50,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:33:50,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:33:50,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:33:50,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:33:50,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:33:50,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:33:50,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:33:50,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:33:50,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:33:50,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:33:50,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:33:50,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:33:50,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:33:50,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:33:50,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:33:50,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:33:50,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:33:50,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:33:50,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:33:50,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:33:50,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:33:50,548 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:33:50,549 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:33:50,549 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:33:50,549 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:33:50,556 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:33:50,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:33:50,557 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:33:50,558 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:33:50,558 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:33:50,558 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:33:50,559 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:33:50,559 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:33:50,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:33:50,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:33:50,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:33:50,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:33:50,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:33:50,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:33:50,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:33:50,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:33:50,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:33:50,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:33:50,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:33:50,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:33:50,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:33:50,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:33:50,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:33:50,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:50,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:33:50,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:33:50,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:33:50,568 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:33:50,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:33:50,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:33:50,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:33:50,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:33:50,570 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_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2021-11-19 14:33:50,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:33:50,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:33:50,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:33:50,890 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:33:50,891 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:33:50,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-19 14:33:50,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/609c05c48/afd49be72231411f8d6a1214a0cbf477/FLAG388040c52 [2021-11-19 14:33:51,639 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:33:51,640 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-19 14:33:51,674 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/609c05c48/afd49be72231411f8d6a1214a0cbf477/FLAG388040c52 [2021-11-19 14:33:51,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/609c05c48/afd49be72231411f8d6a1214a0cbf477 [2021-11-19 14:33:51,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:33:51,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:33:51,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:51,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:33:51,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:33:51,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:51" (1/1) ... [2021-11-19 14:33:51,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c82cff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:51, skipping insertion in model container [2021-11-19 14:33:51,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:51" (1/1) ... [2021-11-19 14:33:51,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:33:51,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:52,556 WARN L230 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_b7cfe67f-df9a-482c-b33e-6e4d22c97373/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-19 14:33:52,584 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:52,598 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:33:52,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55fff0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:52, skipping insertion in model container [2021-11-19 14:33:52,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:52,599 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:33:52,602 INFO L158 Benchmark]: Toolchain (without parser) took 764.38ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 55.6MB in the beginning and 71.7MB in the end (delta: -16.1MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-19 14:33:52,602 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 94.4MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:33:52,604 INFO L158 Benchmark]: CACSL2BoogieTranslator took 756.99ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 55.3MB in the beginning and 72.1MB in the end (delta: -16.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. [2021-11-19 14:33:52,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 94.4MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 756.99ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 55.3MB in the beginning and 72.1MB in the end (delta: -16.8MB). Peak memory consumption was 8.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1621]: 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_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs --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 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:33:55,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:33:55,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:33:55,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:33:55,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:33:55,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:33:55,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:33:55,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:33:55,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:33:55,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:33:55,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:33:55,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:33:55,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:33:55,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:33:55,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:33:55,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:33:55,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:33:55,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:33:55,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:33:55,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:33:55,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:33:55,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:33:55,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:33:55,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:33:55,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:33:55,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:33:55,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:33:55,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:33:55,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:33:55,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:33:55,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:33:55,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:33:55,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:33:55,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:33:55,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:33:55,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:33:55,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:33:55,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:33:55,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:33:55,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:33:55,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:33:55,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:33:55,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:33:55,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:33:55,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:33:55,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:33:55,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:33:55,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:33:55,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:33:55,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:33:55,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:33:55,384 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:33:55,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:33:55,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:33:55,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:33:55,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:33:55,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:33:55,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:33:55,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:33:55,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:33:55,390 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:33:55,390 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:33:55,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:33:55,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:33:55,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:33:55,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:33:55,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:33:55,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:33:55,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:33:55,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:55,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:33:55,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:33:55,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:33:55,394 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:33:55,394 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:55,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:33:55,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:33:55,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:33:55,395 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_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2021-11-19 14:33:55,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:33:55,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:33:55,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:33:55,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:33:55,819 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:33:55,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-19 14:33:55,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/2fbd90695/bef887a6aeb346408898de6f867d5830/FLAGa79bf2f05 [2021-11-19 14:33:56,700 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:33:56,702 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-19 14:33:56,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/2fbd90695/bef887a6aeb346408898de6f867d5830/FLAGa79bf2f05 [2021-11-19 14:33:56,867 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/data/2fbd90695/bef887a6aeb346408898de6f867d5830 [2021-11-19 14:33:56,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:33:56,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:33:56,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:56,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:33:56,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:33:56,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:56" (1/1) ... [2021-11-19 14:33:56,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15dcf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:56, skipping insertion in model container [2021-11-19 14:33:56,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:33:56" (1/1) ... [2021-11-19 14:33:56,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:33:56,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:57,727 WARN L230 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_b7cfe67f-df9a-482c-b33e-6e4d22c97373/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-19 14:33:57,756 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:57,783 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:33:57,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:33:57,968 WARN L230 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_b7cfe67f-df9a-482c-b33e-6e4d22c97373/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-19 14:33:57,981 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:57,987 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:33:58,075 WARN L230 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_b7cfe67f-df9a-482c-b33e-6e4d22c97373/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-19 14:33:58,087 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:33:58,121 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:33:58,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58 WrapperNode [2021-11-19 14:33:58,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:33:58,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:58,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:33:58,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:33:58,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,249 INFO L137 Inliner]: procedures = 95, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 806 [2021-11-19 14:33:58,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:33:58,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:33:58,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:33:58,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:33:58,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:33:58,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:33:58,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:33:58,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:33:58,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (1/1) ... [2021-11-19 14:33:58,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:33:58,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:58,457 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:33:58,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:33:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:33:58,525 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:33:58,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:33:58,525 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:33:58,525 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:33:58,525 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:33:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:33:58,526 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:33:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:33:58,526 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:33:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:33:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:33:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:33:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:33:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:33:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:33:58,528 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:33:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:33:58,528 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:33:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:33:58,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:33:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:33:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:33:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:33:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:33:58,529 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:33:58,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:33:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:33:58,530 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:33:58,530 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:33:58,531 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:33:58,532 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:33:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2021-11-19 14:33:58,532 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2021-11-19 14:33:58,532 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:33:58,533 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:33:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:33:58,533 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:33:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:33:58,533 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:33:58,533 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:33:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:33:58,534 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:33:58,534 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:33:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:33:58,535 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:33:58,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:33:58,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:33:58,537 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:33:58,537 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:33:58,694 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:33:58,697 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:34:00,171 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:34:00,198 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:34:00,198 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:34:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:34:00 BoogieIcfgContainer [2021-11-19 14:34:00,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:34:00,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:34:00,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:34:00,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:34:00,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:33:56" (1/3) ... [2021-11-19 14:34:00,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6564e428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:34:00, skipping insertion in model container [2021-11-19 14:34:00,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:33:58" (2/3) ... [2021-11-19 14:34:00,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6564e428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:34:00, skipping insertion in model container [2021-11-19 14:34:00,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:34:00" (3/3) ... [2021-11-19 14:34:00,212 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2021-11-19 14:34:00,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:34:00,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:34:00,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:34:00,304 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 [2021-11-19 14:34:00,304 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:34:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 557 states, 438 states have (on average 1.7031963470319635) internal successors, (746), 461 states have internal predecessors, (746), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-19 14:34:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 14:34:00,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:00,407 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] [2021-11-19 14:34:00,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:00,414 INFO L85 PathProgramCache]: Analyzing trace with hash -452819156, now seen corresponding path program 1 times [2021-11-19 14:34:00,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:00,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923236584] [2021-11-19 14:34:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:00,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:00,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:00,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:00,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:34:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:34:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:34:01,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:34:01,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:01,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923236584] [2021-11-19 14:34:01,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923236584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:01,456 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:01,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:34:01,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186809309] [2021-11-19 14:34:01,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:01,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:34:01,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:34:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:34:01,515 INFO L87 Difference]: Start difference. First operand has 557 states, 438 states have (on average 1.7031963470319635) internal successors, (746), 461 states have internal predecessors, (746), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 14:34:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:01,647 INFO L93 Difference]: Finished difference Result 578 states and 964 transitions. [2021-11-19 14:34:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:34:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2021-11-19 14:34:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:01,685 INFO L225 Difference]: With dead ends: 578 [2021-11-19 14:34:01,686 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 14:34:01,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:34:01,704 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:01,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 14:34:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 14:34:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.7013888888888888) internal successors, (735), 453 states have internal predecessors, (735), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 918 transitions. [2021-11-19 14:34:01,837 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 918 transitions. Word has length 79 [2021-11-19 14:34:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:01,839 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 918 transitions. [2021-11-19 14:34:01,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-19 14:34:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 918 transitions. [2021-11-19 14:34:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 14:34:01,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:01,846 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] [2021-11-19 14:34:01,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:02,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:02,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1489058496, now seen corresponding path program 1 times [2021-11-19 14:34:02,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:02,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857545696] [2021-11-19 14:34:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:02,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:02,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:02,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:02,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:34:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:02,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:34:02,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:34:03,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:03,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857545696] [2021-11-19 14:34:03,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857545696] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:03,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:03,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:03,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254309931] [2021-11-19 14:34:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:03,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:03,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:03,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:03,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:03,238 INFO L87 Difference]: Start difference. First operand 549 states and 918 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:03,381 INFO L93 Difference]: Finished difference Result 1089 states and 1828 transitions. [2021-11-19 14:34:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2021-11-19 14:34:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:03,389 INFO L225 Difference]: With dead ends: 1089 [2021-11-19 14:34:03,390 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 14:34:03,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:34:03,398 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 14 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:03,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2705 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 14:34:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 14:34:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.6990740740740742) internal successors, (734), 453 states have internal predecessors, (734), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 917 transitions. [2021-11-19 14:34:03,441 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 917 transitions. Word has length 81 [2021-11-19 14:34:03,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:03,442 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 917 transitions. [2021-11-19 14:34:03,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:03,443 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 917 transitions. [2021-11-19 14:34:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:34:03,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:03,446 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] [2021-11-19 14:34:03,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:03,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:03,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1789740480, now seen corresponding path program 1 times [2021-11-19 14:34:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:03,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404773994] [2021-11-19 14:34:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:03,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:03,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:03,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:34:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:04,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:04,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:34:04,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:34:04,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:04,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404773994] [2021-11-19 14:34:04,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404773994] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:04,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:04,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:04,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721358645] [2021-11-19 14:34:04,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:04,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:04,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:04,728 INFO L87 Difference]: Start difference. First operand 549 states and 917 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:04,834 INFO L93 Difference]: Finished difference Result 1089 states and 1826 transitions. [2021-11-19 14:34:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:04,835 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2021-11-19 14:34:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:04,842 INFO L225 Difference]: With dead ends: 1089 [2021-11-19 14:34:04,842 INFO L226 Difference]: Without dead ends: 549 [2021-11-19 14:34:04,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:34:04,848 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 12 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:04,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2705 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-19 14:34:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-19 14:34:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 432 states have (on average 1.6967592592592593) internal successors, (733), 453 states have internal predecessors, (733), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 916 transitions. [2021-11-19 14:34:04,905 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 916 transitions. Word has length 83 [2021-11-19 14:34:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:04,906 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 916 transitions. [2021-11-19 14:34:04,906 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 916 transitions. [2021-11-19 14:34:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:34:04,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:04,912 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] [2021-11-19 14:34:04,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:05,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:05,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:05,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2051322496, now seen corresponding path program 1 times [2021-11-19 14:34:05,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:05,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078973269] [2021-11-19 14:34:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:05,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:05,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:05,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:05,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:34:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:05,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:34:05,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:34:06,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:06,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078973269] [2021-11-19 14:34:06,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078973269] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:06,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:06,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:06,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597617630] [2021-11-19 14:34:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:06,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:06,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:06,082 INFO L87 Difference]: Start difference. First operand 549 states and 916 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:06,174 INFO L93 Difference]: Finished difference Result 1093 states and 1829 transitions. [2021-11-19 14:34:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:34:06,175 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2021-11-19 14:34:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:06,180 INFO L225 Difference]: With dead ends: 1093 [2021-11-19 14:34:06,181 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 14:34:06,186 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 [2021-11-19 14:34:06,191 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 13 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:06,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2705 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:06,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 14:34:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 14:34:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 437 states have (on average 1.688787185354691) internal successors, (738), 458 states have internal predecessors, (738), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 921 transitions. [2021-11-19 14:34:06,233 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 921 transitions. Word has length 85 [2021-11-19 14:34:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:06,233 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 921 transitions. [2021-11-19 14:34:06,234 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 921 transitions. [2021-11-19 14:34:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:34:06,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:06,237 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] [2021-11-19 14:34:06,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:06,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:06,454 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:06,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash -45070625, now seen corresponding path program 1 times [2021-11-19 14:34:06,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:06,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272723268] [2021-11-19 14:34:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:06,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:06,457 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:06,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:34:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:06,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:34:07,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:34:07,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:07,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272723268] [2021-11-19 14:34:07,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272723268] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:07,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:07,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:07,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907290610] [2021-11-19 14:34:07,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:07,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:07,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:07,415 INFO L87 Difference]: Start difference. First operand 555 states and 921 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:07,486 INFO L93 Difference]: Finished difference Result 1092 states and 1820 transitions. [2021-11-19 14:34:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 86 [2021-11-19 14:34:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:07,493 INFO L225 Difference]: With dead ends: 1092 [2021-11-19 14:34:07,493 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 14:34:07,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:34:07,497 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 8 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:07,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2706 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 14:34:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 14:34:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 437 states have (on average 1.6864988558352403) internal successors, (737), 458 states have internal predecessors, (737), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 920 transitions. [2021-11-19 14:34:07,526 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 920 transitions. Word has length 86 [2021-11-19 14:34:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:07,527 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 920 transitions. [2021-11-19 14:34:07,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 920 transitions. [2021-11-19 14:34:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:34:07,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:07,530 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] [2021-11-19 14:34:07,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:07,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:07,750 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash 84493924, now seen corresponding path program 1 times [2021-11-19 14:34:07,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:07,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994469482] [2021-11-19 14:34:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:07,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:07,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:07,753 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:07,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:34:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:34:08,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:34:08,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:08,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994469482] [2021-11-19 14:34:08,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994469482] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:08,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:08,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:08,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166454717] [2021-11-19 14:34:08,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:08,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:08,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:08,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:08,750 INFO L87 Difference]: Start difference. First operand 555 states and 920 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:08,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:08,837 INFO L93 Difference]: Finished difference Result 1092 states and 1819 transitions. [2021-11-19 14:34:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:08,838 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-11-19 14:34:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:08,848 INFO L225 Difference]: With dead ends: 1092 [2021-11-19 14:34:08,848 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 14:34:08,853 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 [2021-11-19 14:34:08,855 INFO L933 BasicCegarLoop]: 905 mSDtfsCounter, 6 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:08,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2706 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 14:34:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-19 14:34:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 437 states have (on average 1.6842105263157894) internal successors, (736), 458 states have internal predecessors, (736), 94 states have call successors, (94), 24 states have call predecessors, (94), 23 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 919 transitions. [2021-11-19 14:34:08,894 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 919 transitions. Word has length 87 [2021-11-19 14:34:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:08,895 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 919 transitions. [2021-11-19 14:34:08,895 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 919 transitions. [2021-11-19 14:34:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:34:08,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:08,898 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] [2021-11-19 14:34:08,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:09,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:09,115 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:09,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:09,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2128673661, now seen corresponding path program 1 times [2021-11-19 14:34:09,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:09,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441397706] [2021-11-19 14:34:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:09,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:09,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:09,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:09,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:34:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:09,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:34:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:09,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:10,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:10,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441397706] [2021-11-19 14:34:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441397706] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:10,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:10,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:34:10,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921121289] [2021-11-19 14:34:10,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:10,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:10,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:10,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:34:10,092 INFO L87 Difference]: Start difference. First operand 555 states and 919 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:10,309 INFO L93 Difference]: Finished difference Result 1109 states and 1847 transitions. [2021-11-19 14:34:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 88 [2021-11-19 14:34:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:10,320 INFO L225 Difference]: With dead ends: 1109 [2021-11-19 14:34:10,321 INFO L226 Difference]: Without dead ends: 576 [2021-11-19 14:34:10,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:10,325 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 148 mSDsluCounter, 4408 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5311 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:10,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5311 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:34:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-19 14:34:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2021-11-19 14:34:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 453 states have (on average 1.6821192052980132) internal successors, (762), 476 states have internal predecessors, (762), 95 states have call successors, (95), 24 states have call predecessors, (95), 25 states have return successors, (93), 87 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-19 14:34:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 950 transitions. [2021-11-19 14:34:10,358 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 950 transitions. Word has length 88 [2021-11-19 14:34:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:10,361 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 950 transitions. [2021-11-19 14:34:10,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 950 transitions. [2021-11-19 14:34:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 14:34:10,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:10,364 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] [2021-11-19 14:34:10,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:10,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:10,585 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1682618308, now seen corresponding path program 1 times [2021-11-19 14:34:10,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:10,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860248576] [2021-11-19 14:34:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:10,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:10,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:10,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:34:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:34:11,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:34:11,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:11,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860248576] [2021-11-19 14:34:11,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860248576] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:11,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:11,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:34:11,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149215708] [2021-11-19 14:34:11,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:11,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:11,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:34:11,440 INFO L87 Difference]: Start difference. First operand 574 states and 950 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:11,538 INFO L93 Difference]: Finished difference Result 1122 states and 1869 transitions. [2021-11-19 14:34:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:34:11,538 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2021-11-19 14:34:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:11,544 INFO L225 Difference]: With dead ends: 1122 [2021-11-19 14:34:11,544 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 14:34:11,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:11,549 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 8 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:11,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2705 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:34:11,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 14:34:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 14:34:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 451 states have (on average 1.6829268292682926) internal successors, (759), 473 states have internal predecessors, (759), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-19 14:34:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 943 transitions. [2021-11-19 14:34:11,590 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 943 transitions. Word has length 88 [2021-11-19 14:34:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:11,590 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 943 transitions. [2021-11-19 14:34:11,591 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 943 transitions. [2021-11-19 14:34:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:34:11,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:11,594 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] [2021-11-19 14:34:11,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:11,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:11,811 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2069966294, now seen corresponding path program 1 times [2021-11-19 14:34:11,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:11,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755135811] [2021-11-19 14:34:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:11,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:11,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:11,813 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:11,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:34:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:12,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:34:12,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:12,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755135811] [2021-11-19 14:34:12,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755135811] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:12,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:12,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:12,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901429212] [2021-11-19 14:34:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:12,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:12,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:12,620 INFO L87 Difference]: Start difference. First operand 570 states and 943 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:12,801 INFO L93 Difference]: Finished difference Result 1148 states and 1914 transitions. [2021-11-19 14:34:12,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:12,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 89 [2021-11-19 14:34:12,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:12,814 INFO L225 Difference]: With dead ends: 1148 [2021-11-19 14:34:12,815 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 14:34:12,818 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 [2021-11-19 14:34:12,820 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 134 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:12,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2513 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 14:34:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 14:34:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 451 states have (on average 1.671840354767184) internal successors, (754), 473 states have internal predecessors, (754), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-19 14:34:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 938 transitions. [2021-11-19 14:34:12,846 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 938 transitions. Word has length 89 [2021-11-19 14:34:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:12,846 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 938 transitions. [2021-11-19 14:34:12,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 938 transitions. [2021-11-19 14:34:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:34:12,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:12,849 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] [2021-11-19 14:34:12,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:13,069 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -399760830, now seen corresponding path program 1 times [2021-11-19 14:34:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:13,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684629220] [2021-11-19 14:34:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:13,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:13,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:13,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:34:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:13,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:13,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:34:13,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:13,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684629220] [2021-11-19 14:34:13,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684629220] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:13,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:13,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:13,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76817236] [2021-11-19 14:34:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:13,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:13,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:13,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:13,825 INFO L87 Difference]: Start difference. First operand 570 states and 938 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:14,027 INFO L93 Difference]: Finished difference Result 1148 states and 1904 transitions. [2021-11-19 14:34:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:14,028 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-11-19 14:34:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:14,035 INFO L225 Difference]: With dead ends: 1148 [2021-11-19 14:34:14,035 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 14:34:14,039 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 [2021-11-19 14:34:14,039 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 128 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:14,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2513 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 14:34:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 570. [2021-11-19 14:34:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 451 states have (on average 1.6607538802660753) internal successors, (749), 473 states have internal predecessors, (749), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (90), 86 states have call predecessors, (90), 89 states have call successors, (90) [2021-11-19 14:34:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 933 transitions. [2021-11-19 14:34:14,071 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 933 transitions. Word has length 91 [2021-11-19 14:34:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:14,071 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 933 transitions. [2021-11-19 14:34:14,072 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 933 transitions. [2021-11-19 14:34:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:34:14,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:14,074 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] [2021-11-19 14:34:14,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:14,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:14,295 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1393568394, now seen corresponding path program 1 times [2021-11-19 14:34:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:14,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988529016] [2021-11-19 14:34:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:14,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:14,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:14,299 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:14,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:34:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:14,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:14,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:14,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:34:15,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:15,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988529016] [2021-11-19 14:34:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988529016] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:15,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:15,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:15,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857757325] [2021-11-19 14:34:15,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:15,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:15,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:15,076 INFO L87 Difference]: Start difference. First operand 570 states and 933 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:15,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:15,256 INFO L93 Difference]: Finished difference Result 1169 states and 1925 transitions. [2021-11-19 14:34:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:34:15,258 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-11-19 14:34:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:15,264 INFO L225 Difference]: With dead ends: 1169 [2021-11-19 14:34:15,264 INFO L226 Difference]: Without dead ends: 600 [2021-11-19 14:34:15,267 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 [2021-11-19 14:34:15,268 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 143 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:15,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2523 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-19 14:34:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 585. [2021-11-19 14:34:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 466 states have (on average 1.6394849785407726) internal successors, (764), 487 states have internal predecessors, (764), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 947 transitions. [2021-11-19 14:34:15,292 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 947 transitions. Word has length 93 [2021-11-19 14:34:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:15,293 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 947 transitions. [2021-11-19 14:34:15,293 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 947 transitions. [2021-11-19 14:34:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:34:15,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:15,295 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] [2021-11-19 14:34:15,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:15,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:15,515 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2004653834, now seen corresponding path program 1 times [2021-11-19 14:34:15,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:15,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319391717] [2021-11-19 14:34:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:15,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:15,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:15,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:15,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:34:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:15,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:34:15,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:16,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:16,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:16,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319391717] [2021-11-19 14:34:16,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319391717] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:16,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:16,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:34:16,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357236257] [2021-11-19 14:34:16,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:16,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:16,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:16,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:34:16,424 INFO L87 Difference]: Start difference. First operand 585 states and 947 transitions. Second operand has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:16,598 INFO L93 Difference]: Finished difference Result 1133 states and 1846 transitions. [2021-11-19 14:34:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2021-11-19 14:34:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:16,605 INFO L225 Difference]: With dead ends: 1133 [2021-11-19 14:34:16,605 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 14:34:16,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:16,611 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 131 mSDsluCounter, 4373 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5279 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:16,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5279 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 14:34:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 564. [2021-11-19 14:34:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6337078651685393) internal successors, (727), 466 states have internal predecessors, (727), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 910 transitions. [2021-11-19 14:34:16,635 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 910 transitions. Word has length 93 [2021-11-19 14:34:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:16,636 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 910 transitions. [2021-11-19 14:34:16,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 910 transitions. [2021-11-19 14:34:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-19 14:34:16,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:16,639 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] [2021-11-19 14:34:16,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:16,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:16,859 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash 776975392, now seen corresponding path program 1 times [2021-11-19 14:34:16,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:16,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850271687] [2021-11-19 14:34:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:16,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:16,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:16,861 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:16,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:34:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:34:17,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:17,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850271687] [2021-11-19 14:34:17,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850271687] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:17,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:17,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:17,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87305124] [2021-11-19 14:34:17,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:17,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:17,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:17,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:17,685 INFO L87 Difference]: Start difference. First operand 564 states and 910 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:17,792 INFO L93 Difference]: Finished difference Result 1097 states and 1784 transitions. [2021-11-19 14:34:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-11-19 14:34:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:17,801 INFO L225 Difference]: With dead ends: 1097 [2021-11-19 14:34:17,801 INFO L226 Difference]: Without dead ends: 564 [2021-11-19 14:34:17,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:34:17,805 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 69 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:17,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2537 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-19 14:34:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-19 14:34:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6314606741573034) internal successors, (726), 466 states have internal predecessors, (726), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 909 transitions. [2021-11-19 14:34:17,831 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 909 transitions. Word has length 94 [2021-11-19 14:34:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:17,831 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 909 transitions. [2021-11-19 14:34:17,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 909 transitions. [2021-11-19 14:34:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:34:17,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:17,834 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] [2021-11-19 14:34:17,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:18,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:18,050 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash -338078895, now seen corresponding path program 1 times [2021-11-19 14:34:18,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:18,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651150789] [2021-11-19 14:34:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:18,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:18,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:18,053 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:18,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:34:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:18,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:18,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:34:18,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:18,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651150789] [2021-11-19 14:34:18,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651150789] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:18,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:18,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:34:18,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290192253] [2021-11-19 14:34:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:18,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:34:18,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:34:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:18,918 INFO L87 Difference]: Start difference. First operand 564 states and 909 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:19,031 INFO L93 Difference]: Finished difference Result 1097 states and 1783 transitions. [2021-11-19 14:34:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:19,032 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2021-11-19 14:34:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:19,038 INFO L225 Difference]: With dead ends: 1097 [2021-11-19 14:34:19,038 INFO L226 Difference]: Without dead ends: 564 [2021-11-19 14:34:19,042 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 [2021-11-19 14:34:19,043 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 67 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:19,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2537 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-19 14:34:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-19 14:34:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 445 states have (on average 1.6292134831460674) internal successors, (725), 466 states have internal predecessors, (725), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 908 transitions. [2021-11-19 14:34:19,073 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 908 transitions. Word has length 95 [2021-11-19 14:34:19,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:19,073 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 908 transitions. [2021-11-19 14:34:19,074 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, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 14:34:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 908 transitions. [2021-11-19 14:34:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-19 14:34:19,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:19,076 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] [2021-11-19 14:34:19,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:19,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:19,290 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash -227458341, now seen corresponding path program 1 times [2021-11-19 14:34:19,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:19,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816941439] [2021-11-19 14:34:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:19,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:19,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:19,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:19,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:34:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:34:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:19,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:20,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:20,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816941439] [2021-11-19 14:34:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816941439] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:20,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:20,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:34:20,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013852695] [2021-11-19 14:34:20,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:34:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:34:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:20,460 INFO L87 Difference]: Start difference. First operand 564 states and 908 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:20,711 INFO L93 Difference]: Finished difference Result 1102 states and 1790 transitions. [2021-11-19 14:34:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:34:20,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2021-11-19 14:34:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:20,722 INFO L225 Difference]: With dead ends: 1102 [2021-11-19 14:34:20,722 INFO L226 Difference]: Without dead ends: 575 [2021-11-19 14:34:20,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:34:20,729 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 109 mSDsluCounter, 5036 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5886 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:20,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5886 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:34:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-19 14:34:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 566. [2021-11-19 14:34:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 447 states have (on average 1.6241610738255035) internal successors, (726), 468 states have internal predecessors, (726), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 909 transitions. [2021-11-19 14:34:20,762 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 909 transitions. Word has length 96 [2021-11-19 14:34:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:20,763 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 909 transitions. [2021-11-19 14:34:20,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 909 transitions. [2021-11-19 14:34:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:34:20,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:20,766 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] [2021-11-19 14:34:20,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:20,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:20,986 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1219436964, now seen corresponding path program 1 times [2021-11-19 14:34:20,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:20,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895416993] [2021-11-19 14:34:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:20,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:20,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:20,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:20,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:34:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:21,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:34:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:21,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:22,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:22,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895416993] [2021-11-19 14:34:22,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895416993] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:22,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:34:22,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:34:22,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073118811] [2021-11-19 14:34:22,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:22,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:34:22,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:34:22,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:22,036 INFO L87 Difference]: Start difference. First operand 566 states and 909 transitions. Second operand has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:22,272 INFO L93 Difference]: Finished difference Result 1094 states and 1771 transitions. [2021-11-19 14:34:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:34:22,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2021-11-19 14:34:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:22,280 INFO L225 Difference]: With dead ends: 1094 [2021-11-19 14:34:22,280 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 14:34:22,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:34:22,284 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 77 mSDsluCounter, 5042 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5894 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:22,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5894 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:34:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 14:34:22,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 568. [2021-11-19 14:34:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 449 states have (on average 1.6191536748329622) internal successors, (727), 470 states have internal predecessors, (727), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 910 transitions. [2021-11-19 14:34:22,312 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 910 transitions. Word has length 97 [2021-11-19 14:34:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:22,313 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 910 transitions. [2021-11-19 14:34:22,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 14:34:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 910 transitions. [2021-11-19 14:34:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:34:22,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:22,316 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] [2021-11-19 14:34:22,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 14:34:22,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:22,537 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2038420421, now seen corresponding path program 1 times [2021-11-19 14:34:22,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:22,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3886256] [2021-11-19 14:34:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:22,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:22,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:22,539 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:22,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:34:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:22,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:34:22,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:23,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:23,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:23,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3886256] [2021-11-19 14:34:23,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3886256] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:23,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:23,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:34:23,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943913781] [2021-11-19 14:34:23,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:23,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:34:23,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:23,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:34:23,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:34:23,471 INFO L87 Difference]: Start difference. First operand 568 states and 910 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:23,623 INFO L93 Difference]: Finished difference Result 1040 states and 1698 transitions. [2021-11-19 14:34:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:34:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 98 [2021-11-19 14:34:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:23,630 INFO L225 Difference]: With dead ends: 1040 [2021-11-19 14:34:23,631 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 14:34:23,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:23,635 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 110 mSDsluCounter, 4253 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5117 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:23,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5117 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 14:34:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 14:34:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 442 states have (on average 1.6266968325791855) internal successors, (719), 463 states have internal predecessors, (719), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 902 transitions. [2021-11-19 14:34:23,662 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 902 transitions. Word has length 98 [2021-11-19 14:34:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:23,662 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 902 transitions. [2021-11-19 14:34:23,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 902 transitions. [2021-11-19 14:34:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:34:23,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:23,665 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] [2021-11-19 14:34:23,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:23,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:23,886 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1649884760, now seen corresponding path program 1 times [2021-11-19 14:34:23,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:23,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742735572] [2021-11-19 14:34:23,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:23,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:23,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:23,888 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:23,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:34:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:24,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:34:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:24,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:24,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:24,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742735572] [2021-11-19 14:34:24,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742735572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:24,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:24,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:34:24,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403957335] [2021-11-19 14:34:24,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:24,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:34:24,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:34:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:34:24,730 INFO L87 Difference]: Start difference. First operand 561 states and 902 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:24,917 INFO L93 Difference]: Finished difference Result 1045 states and 1712 transitions. [2021-11-19 14:34:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:24,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 99 [2021-11-19 14:34:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:24,923 INFO L225 Difference]: With dead ends: 1045 [2021-11-19 14:34:24,923 INFO L226 Difference]: Without dead ends: 558 [2021-11-19 14:34:24,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:24,927 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 98 mSDsluCounter, 5889 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6745 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:24,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 6745 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-19 14:34:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-19 14:34:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 439 states have (on average 1.6264236902050113) internal successors, (714), 460 states have internal predecessors, (714), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 897 transitions. [2021-11-19 14:34:24,950 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 897 transitions. Word has length 99 [2021-11-19 14:34:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:24,951 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 897 transitions. [2021-11-19 14:34:24,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 897 transitions. [2021-11-19 14:34:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:34:24,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:24,953 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] [2021-11-19 14:34:24,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-19 14:34:25,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:25,167 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 488783400, now seen corresponding path program 1 times [2021-11-19 14:34:25,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:25,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228498527] [2021-11-19 14:34:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:25,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:25,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:25,169 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:25,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:34:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:34:25,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:25,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:26,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:26,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228498527] [2021-11-19 14:34:26,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228498527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:26,042 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:26,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:34:26,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057240991] [2021-11-19 14:34:26,042 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:26,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:34:26,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:34:26,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:34:26,045 INFO L87 Difference]: Start difference. First operand 558 states and 897 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:34:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:26,168 INFO L93 Difference]: Finished difference Result 1042 states and 1707 transitions. [2021-11-19 14:34:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 99 [2021-11-19 14:34:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:26,174 INFO L225 Difference]: With dead ends: 1042 [2021-11-19 14:34:26,174 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 14:34:26,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:26,178 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 142 mSDsluCounter, 4212 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5067 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:26,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5067 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 14:34:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-19 14:34:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 431 states have (on average 1.631090487238979) internal successors, (703), 452 states have internal predecessors, (703), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 886 transitions. [2021-11-19 14:34:26,224 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 886 transitions. Word has length 99 [2021-11-19 14:34:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:26,224 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 886 transitions. [2021-11-19 14:34:26,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-19 14:34:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 886 transitions. [2021-11-19 14:34:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 14:34:26,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:26,227 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] [2021-11-19 14:34:26,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:26,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:26,437 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash -987521975, now seen corresponding path program 1 times [2021-11-19 14:34:26,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:26,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733797372] [2021-11-19 14:34:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:26,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:26,440 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:26,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:34:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:34:26,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:26,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:27,377 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:27,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733797372] [2021-11-19 14:34:27,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733797372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:27,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:27,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:34:27,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983895517] [2021-11-19 14:34:27,378 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:27,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:34:27,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:34:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:27,380 INFO L87 Difference]: Start difference. First operand 550 states and 886 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:27,586 INFO L93 Difference]: Finished difference Result 1028 states and 1685 transitions. [2021-11-19 14:34:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:34:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 100 [2021-11-19 14:34:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:27,593 INFO L225 Difference]: With dead ends: 1028 [2021-11-19 14:34:27,593 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 14:34:27,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:34:27,602 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 125 mSDsluCounter, 5045 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 5896 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:27,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 5896 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 14:34:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-19 14:34:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 431 states have (on average 1.62877030162413) internal successors, (702), 452 states have internal predecessors, (702), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 885 transitions. [2021-11-19 14:34:27,639 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 885 transitions. Word has length 100 [2021-11-19 14:34:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:27,639 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 885 transitions. [2021-11-19 14:34:27,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 885 transitions. [2021-11-19 14:34:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:34:27,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:27,642 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] [2021-11-19 14:34:27,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:27,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:27,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1877192378, now seen corresponding path program 1 times [2021-11-19 14:34:27,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:27,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681951812] [2021-11-19 14:34:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:27,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:27,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:27,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:34:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:34:28,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:28,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:28,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:28,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681951812] [2021-11-19 14:34:28,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681951812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:28,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:28,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:34:28,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002094763] [2021-11-19 14:34:28,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:28,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:34:28,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:34:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:28,821 INFO L87 Difference]: Start difference. First operand 550 states and 885 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:29,048 INFO L93 Difference]: Finished difference Result 1072 states and 1742 transitions. [2021-11-19 14:34:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:34:29,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 101 [2021-11-19 14:34:29,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:29,055 INFO L225 Difference]: With dead ends: 1072 [2021-11-19 14:34:29,055 INFO L226 Difference]: Without dead ends: 547 [2021-11-19 14:34:29,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:34:29,059 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 128 mSDsluCounter, 7465 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 8304 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:29,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 8304 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:34:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-19 14:34:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2021-11-19 14:34:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 428 states have (on average 1.6214953271028036) internal successors, (694), 449 states have internal predecessors, (694), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 877 transitions. [2021-11-19 14:34:29,085 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 877 transitions. Word has length 101 [2021-11-19 14:34:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 877 transitions. [2021-11-19 14:34:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 877 transitions. [2021-11-19 14:34:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:34:29,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:29,088 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] [2021-11-19 14:34:29,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:29,322 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 289345582, now seen corresponding path program 1 times [2021-11-19 14:34:29,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:29,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361559795] [2021-11-19 14:34:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:29,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:29,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:29,325 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:29,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:34:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:34:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:29,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:30,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:30,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361559795] [2021-11-19 14:34:30,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361559795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:30,341 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:30,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:34:30,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700194969] [2021-11-19 14:34:30,342 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:30,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:34:30,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:34:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:30,347 INFO L87 Difference]: Start difference. First operand 547 states and 877 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:30,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:30,606 INFO L93 Difference]: Finished difference Result 1019 states and 1665 transitions. [2021-11-19 14:34:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:34:30,607 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 102 [2021-11-19 14:34:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:30,612 INFO L225 Difference]: With dead ends: 1019 [2021-11-19 14:34:30,612 INFO L226 Difference]: Without dead ends: 547 [2021-11-19 14:34:30,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:34:30,617 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 51 mSDsluCounter, 6648 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 7488 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:30,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 7488 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:34:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-19 14:34:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2021-11-19 14:34:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 428 states have (on average 1.6191588785046729) internal successors, (693), 449 states have internal predecessors, (693), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 876 transitions. [2021-11-19 14:34:30,641 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 876 transitions. Word has length 102 [2021-11-19 14:34:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:30,641 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 876 transitions. [2021-11-19 14:34:30,642 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, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 876 transitions. [2021-11-19 14:34:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:34:30,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:30,644 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] [2021-11-19 14:34:30,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:30,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:30,864 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash 371915255, now seen corresponding path program 1 times [2021-11-19 14:34:30,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:30,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823944327] [2021-11-19 14:34:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:30,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:30,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:30,867 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:30,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:34:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:34:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:31,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:34:31,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:31,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823944327] [2021-11-19 14:34:31,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823944327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:31,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:31,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:34:31,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971091578] [2021-11-19 14:34:31,794 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:31,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:34:31,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:31,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:34:31,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:31,796 INFO L87 Difference]: Start difference. First operand 547 states and 876 transitions. Second operand has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:32,008 INFO L93 Difference]: Finished difference Result 1057 states and 1710 transitions. [2021-11-19 14:34:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:34:32,010 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 103 [2021-11-19 14:34:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:32,014 INFO L225 Difference]: With dead ends: 1057 [2021-11-19 14:34:32,015 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 14:34:32,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:34:32,019 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 77 mSDsluCounter, 6622 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 7460 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:32,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 7460 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 14:34:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 14:34:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 425 states have (on average 1.611764705882353) internal successors, (685), 446 states have internal predecessors, (685), 94 states have call successors, (94), 25 states have call predecessors, (94), 24 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-19 14:34:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 868 transitions. [2021-11-19 14:34:32,042 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 868 transitions. Word has length 103 [2021-11-19 14:34:32,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:32,043 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 868 transitions. [2021-11-19 14:34:32,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:34:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 868 transitions. [2021-11-19 14:34:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:34:32,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:32,046 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] [2021-11-19 14:34:32,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:32,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:32,267 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 285436627, now seen corresponding path program 1 times [2021-11-19 14:34:32,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:32,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109769595] [2021-11-19 14:34:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:32,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:32,270 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:32,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:34:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:34:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:33,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:33,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:33,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109769595] [2021-11-19 14:34:33,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109769595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:33,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:33,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-19 14:34:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709676075] [2021-11-19 14:34:33,691 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:34:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:34:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:34:33,693 INFO L87 Difference]: Start difference. First operand 544 states and 868 transitions. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-19 14:34:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:39,655 INFO L93 Difference]: Finished difference Result 2055 states and 3425 transitions. [2021-11-19 14:34:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:34:39,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2021-11-19 14:34:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:39,667 INFO L225 Difference]: With dead ends: 2055 [2021-11-19 14:34:39,667 INFO L226 Difference]: Without dead ends: 1591 [2021-11-19 14:34:39,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:34:39,671 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 4331 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 3641 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4439 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 4667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 3641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:39,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4439 Valid, 2509 Invalid, 4667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 3641 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 14:34:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-11-19 14:34:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1399. [2021-11-19 14:34:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1108 states have (on average 1.6714801444043321) internal successors, (1852), 1147 states have internal predecessors, (1852), 237 states have call successors, (237), 52 states have call predecessors, (237), 53 states have return successors, (242), 213 states have call predecessors, (242), 232 states have call successors, (242) [2021-11-19 14:34:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2331 transitions. [2021-11-19 14:34:39,758 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2331 transitions. Word has length 104 [2021-11-19 14:34:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:39,759 INFO L470 AbstractCegarLoop]: Abstraction has 1399 states and 2331 transitions. [2021-11-19 14:34:39,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 6 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-19 14:34:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2331 transitions. [2021-11-19 14:34:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 14:34:39,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:39,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:39,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:39,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:39,978 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1804202070, now seen corresponding path program 1 times [2021-11-19 14:34:39,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:39,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292943768] [2021-11-19 14:34:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:39,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:39,981 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:40,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:34:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:34:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:40,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:41,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:41,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292943768] [2021-11-19 14:34:41,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292943768] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:41,344 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:41,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:34:41,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009518163] [2021-11-19 14:34:41,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:41,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:34:41,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:34:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:34:41,346 INFO L87 Difference]: Start difference. First operand 1399 states and 2331 transitions. Second operand has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:34:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:47,597 INFO L93 Difference]: Finished difference Result 4419 states and 7449 transitions. [2021-11-19 14:34:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 14:34:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 132 [2021-11-19 14:34:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:47,622 INFO L225 Difference]: With dead ends: 4419 [2021-11-19 14:34:47,622 INFO L226 Difference]: Without dead ends: 3100 [2021-11-19 14:34:47,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:34:47,630 INFO L933 BasicCegarLoop]: 1734 mSDtfsCounter, 3109 mSDsluCounter, 3105 mSDsCounter, 0 mSdLazyCounter, 5690 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3195 SdHoareTripleChecker+Valid, 4839 SdHoareTripleChecker+Invalid, 6727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 5690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:47,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3195 Valid, 4839 Invalid, 6727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 5690 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 14:34:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-11-19 14:34:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2742. [2021-11-19 14:34:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2742 states, 2081 states have (on average 1.6415185007208073) internal successors, (3416), 2173 states have internal predecessors, (3416), 556 states have call successors, (556), 87 states have call predecessors, (556), 104 states have return successors, (592), 514 states have call predecessors, (592), 551 states have call successors, (592) [2021-11-19 14:34:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2742 states to 2742 states and 4564 transitions. [2021-11-19 14:34:47,863 INFO L78 Accepts]: Start accepts. Automaton has 2742 states and 4564 transitions. Word has length 132 [2021-11-19 14:34:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:47,864 INFO L470 AbstractCegarLoop]: Abstraction has 2742 states and 4564 transitions. [2021-11-19 14:34:47,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 11 states have internal predecessors, (148), 7 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:34:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2742 states and 4564 transitions. [2021-11-19 14:34:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 14:34:47,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:47,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:47,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:48,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:48,091 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1934563850, now seen corresponding path program 1 times [2021-11-19 14:34:48,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:48,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701975277] [2021-11-19 14:34:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:48,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:48,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:48,093 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:48,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:34:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:48,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:34:48,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:49,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:50,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:50,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701975277] [2021-11-19 14:34:50,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701975277] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:50,112 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:50,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-19 14:34:50,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176283236] [2021-11-19 14:34:50,113 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:50,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:34:50,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:50,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:34:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:34:50,115 INFO L87 Difference]: Start difference. First operand 2742 states and 4564 transitions. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:34:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:53,557 INFO L93 Difference]: Finished difference Result 6187 states and 10516 transitions. [2021-11-19 14:34:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) Word has length 133 [2021-11-19 14:34:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:53,594 INFO L225 Difference]: With dead ends: 6187 [2021-11-19 14:34:53,594 INFO L226 Difference]: Without dead ends: 3525 [2021-11-19 14:34:53,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:34:53,618 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 1408 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 3200 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 2721 SdHoareTripleChecker+Invalid, 3737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:53,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1408 Valid, 2721 Invalid, 3737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3200 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 14:34:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2021-11-19 14:34:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 2766. [2021-11-19 14:34:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2099 states have (on average 1.6360171510242973) internal successors, (3434), 2191 states have internal predecessors, (3434), 556 states have call successors, (556), 87 states have call predecessors, (556), 110 states have return successors, (658), 520 states have call predecessors, (658), 551 states have call successors, (658) [2021-11-19 14:34:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 4648 transitions. [2021-11-19 14:34:53,921 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 4648 transitions. Word has length 133 [2021-11-19 14:34:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:53,921 INFO L470 AbstractCegarLoop]: Abstraction has 2766 states and 4648 transitions. [2021-11-19 14:34:53,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 12 states have internal predecessors, (165), 6 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 8 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:34:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 4648 transitions. [2021-11-19 14:34:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 14:34:53,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:53,926 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:53,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:54,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:54,148 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1695194515, now seen corresponding path program 1 times [2021-11-19 14:34:54,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:54,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863950851] [2021-11-19 14:34:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:54,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:54,150 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:54,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:34:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:34:54,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:54,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:34:55,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:55,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863950851] [2021-11-19 14:34:55,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863950851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:55,595 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:55,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:34:55,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547210913] [2021-11-19 14:34:55,596 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:55,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:34:55,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:34:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:34:55,598 INFO L87 Difference]: Start difference. First operand 2766 states and 4648 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-19 14:35:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:01,197 INFO L93 Difference]: Finished difference Result 8980 states and 15484 transitions. [2021-11-19 14:35:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:35:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 134 [2021-11-19 14:35:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:01,255 INFO L225 Difference]: With dead ends: 8980 [2021-11-19 14:35:01,255 INFO L226 Difference]: Without dead ends: 6294 [2021-11-19 14:35:01,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:35:01,277 INFO L933 BasicCegarLoop]: 1406 mSDtfsCounter, 3847 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 4030 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3922 SdHoareTripleChecker+Valid, 3502 SdHoareTripleChecker+Invalid, 5083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 4030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:01,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3922 Valid, 3502 Invalid, 5083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 4030 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-11-19 14:35:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-11-19 14:35:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 5988. [2021-11-19 14:35:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5988 states, 4545 states have (on average 1.6336633663366336) internal successors, (7425), 4765 states have internal predecessors, (7425), 1189 states have call successors, (1189), 215 states have call predecessors, (1189), 253 states have return successors, (1363), 1084 states have call predecessors, (1363), 1184 states have call successors, (1363) [2021-11-19 14:35:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 9977 transitions. [2021-11-19 14:35:01,837 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 9977 transitions. Word has length 134 [2021-11-19 14:35:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:01,838 INFO L470 AbstractCegarLoop]: Abstraction has 5988 states and 9977 transitions. [2021-11-19 14:35:01,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 6 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-19 14:35:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 9977 transitions. [2021-11-19 14:35:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:35:01,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:01,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:01,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:02,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:02,065 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1181890022, now seen corresponding path program 1 times [2021-11-19 14:35:02,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:02,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819190925] [2021-11-19 14:35:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:02,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:02,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:02,067 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:02,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:35:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:02,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:35:02,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:02,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:03,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:03,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819190925] [2021-11-19 14:35:03,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819190925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:03,665 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:03,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-19 14:35:03,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263886925] [2021-11-19 14:35:03,665 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:03,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:35:03,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:35:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:35:03,669 INFO L87 Difference]: Start difference. First operand 5988 states and 9977 transitions. Second operand has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 14:35:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:13,954 INFO L93 Difference]: Finished difference Result 23369 states and 40342 transitions. [2021-11-19 14:35:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:35:13,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 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 136 [2021-11-19 14:35:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:14,124 INFO L225 Difference]: With dead ends: 23369 [2021-11-19 14:35:14,125 INFO L226 Difference]: Without dead ends: 17443 [2021-11-19 14:35:14,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:35:14,171 INFO L933 BasicCegarLoop]: 1726 mSDtfsCounter, 4700 mSDsluCounter, 3172 mSDsCounter, 0 mSdLazyCounter, 8022 mSolverCounterSat, 2379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4793 SdHoareTripleChecker+Valid, 4898 SdHoareTripleChecker+Invalid, 10401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2379 IncrementalHoareTripleChecker+Valid, 8022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:14,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4793 Valid, 4898 Invalid, 10401 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2379 Valid, 8022 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-19 14:35:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17443 states. [2021-11-19 14:35:15,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17443 to 11119. [2021-11-19 14:35:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11119 states, 8166 states have (on average 1.6202547146705855) internal successors, (13231), 8662 states have internal predecessors, (13231), 2516 states have call successors, (2516), 333 states have call predecessors, (2516), 436 states have return successors, (2955), 2389 states have call predecessors, (2955), 2511 states have call successors, (2955) [2021-11-19 14:35:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11119 states to 11119 states and 18702 transitions. [2021-11-19 14:35:15,594 INFO L78 Accepts]: Start accepts. Automaton has 11119 states and 18702 transitions. Word has length 136 [2021-11-19 14:35:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:15,600 INFO L470 AbstractCegarLoop]: Abstraction has 11119 states and 18702 transitions. [2021-11-19 14:35:15,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 7 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 14:35:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 11119 states and 18702 transitions. [2021-11-19 14:35:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:35:15,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:15,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:15,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:15,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:15,833 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash -758243300, now seen corresponding path program 1 times [2021-11-19 14:35:15,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:15,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88341229] [2021-11-19 14:35:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:15,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:15,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:15,837 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:15,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:35:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:16,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1065 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:35:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:16,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:17,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:17,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88341229] [2021-11-19 14:35:17,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88341229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:17,579 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:17,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-19 14:35:17,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915181291] [2021-11-19 14:35:17,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:35:17,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:35:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:35:17,581 INFO L87 Difference]: Start difference. First operand 11119 states and 18702 transitions. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:35:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:23,800 INFO L93 Difference]: Finished difference Result 32399 states and 55356 transitions. [2021-11-19 14:35:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 14:35:23,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) Word has length 136 [2021-11-19 14:35:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:24,036 INFO L225 Difference]: With dead ends: 32399 [2021-11-19 14:35:24,036 INFO L226 Difference]: Without dead ends: 23032 [2021-11-19 14:35:24,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:35:24,106 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 2861 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2935 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 4455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:24,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2935 Valid, 2764 Invalid, 4455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:35:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23032 states. [2021-11-19 14:35:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23032 to 22034. [2021-11-19 14:35:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22034 states, 16163 states have (on average 1.619006372579348) internal successors, (26168), 17209 states have internal predecessors, (26168), 4905 states have call successors, (4905), 635 states have call predecessors, (4905), 965 states have return successors, (6256), 4683 states have call predecessors, (6256), 4900 states have call successors, (6256) [2021-11-19 14:35:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22034 states to 22034 states and 37329 transitions. [2021-11-19 14:35:26,346 INFO L78 Accepts]: Start accepts. Automaton has 22034 states and 37329 transitions. Word has length 136 [2021-11-19 14:35:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:26,347 INFO L470 AbstractCegarLoop]: Abstraction has 22034 states and 37329 transitions. [2021-11-19 14:35:26,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 6 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (24), 6 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-19 14:35:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 22034 states and 37329 transitions. [2021-11-19 14:35:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 14:35:26,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:26,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:26,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:26,579 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1376688126, now seen corresponding path program 1 times [2021-11-19 14:35:26,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:26,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434576592] [2021-11-19 14:35:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:26,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:26,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:26,583 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:26,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:35:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:35:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:28,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:29,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:29,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434576592] [2021-11-19 14:35:29,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434576592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:29,249 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:29,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:35:29,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031757277] [2021-11-19 14:35:29,250 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:29,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:35:29,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:29,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:35:29,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:35:29,252 INFO L87 Difference]: Start difference. First operand 22034 states and 37329 transitions. Second operand has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 14:35:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:39,955 INFO L93 Difference]: Finished difference Result 62027 states and 105984 transitions. [2021-11-19 14:35:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:35:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) Word has length 141 [2021-11-19 14:35:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:40,448 INFO L225 Difference]: With dead ends: 62027 [2021-11-19 14:35:40,448 INFO L226 Difference]: Without dead ends: 41283 [2021-11-19 14:35:40,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:35:40,779 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 3395 mSDsluCounter, 2124 mSDsCounter, 0 mSdLazyCounter, 5487 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3100 SdHoareTripleChecker+Invalid, 6359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 5487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:40,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3469 Valid, 3100 Invalid, 6359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 5487 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2021-11-19 14:35:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41283 states. [2021-11-19 14:35:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41283 to 40761. [2021-11-19 14:35:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40761 states, 29641 states have (on average 1.6013967140109984) internal successors, (47467), 31584 states have internal predecessors, (47467), 9269 states have call successors, (9269), 1217 states have call predecessors, (9269), 1850 states have return successors, (12139), 8909 states have call predecessors, (12139), 9264 states have call successors, (12139) [2021-11-19 14:35:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40761 states to 40761 states and 68875 transitions. [2021-11-19 14:35:45,114 INFO L78 Accepts]: Start accepts. Automaton has 40761 states and 68875 transitions. Word has length 141 [2021-11-19 14:35:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:45,115 INFO L470 AbstractCegarLoop]: Abstraction has 40761 states and 68875 transitions. [2021-11-19 14:35:45,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 12 states have internal predecessors, (167), 7 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (27), 9 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 14:35:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 40761 states and 68875 transitions. [2021-11-19 14:35:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:35:45,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:45,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:45,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:45,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:45,339 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash 900017696, now seen corresponding path program 1 times [2021-11-19 14:35:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:45,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353211844] [2021-11-19 14:35:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:45,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:45,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:45,343 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:45,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:35:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:45,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:45,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:46,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:35:46,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:46,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353211844] [2021-11-19 14:35:46,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353211844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:46,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:46,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:35:46,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399608310] [2021-11-19 14:35:46,629 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:46,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:35:46,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:35:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:35:46,631 INFO L87 Difference]: Start difference. First operand 40761 states and 68875 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:35:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:50,886 INFO L93 Difference]: Finished difference Result 82494 states and 141089 transitions. [2021-11-19 14:35:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:35:50,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 148 [2021-11-19 14:35:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:51,365 INFO L225 Difference]: With dead ends: 82494 [2021-11-19 14:35:51,365 INFO L226 Difference]: Without dead ends: 40761 [2021-11-19 14:35:51,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:35:51,524 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 310 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 3108 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:51,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 3108 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:35:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40761 states. [2021-11-19 14:35:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40761 to 40761. [2021-11-19 14:35:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40761 states, 29641 states have (on average 1.5833811274923248) internal successors, (46933), 31584 states have internal predecessors, (46933), 9269 states have call successors, (9269), 1217 states have call predecessors, (9269), 1850 states have return successors, (12139), 8909 states have call predecessors, (12139), 9264 states have call successors, (12139) [2021-11-19 14:35:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40761 states to 40761 states and 68341 transitions. [2021-11-19 14:35:55,453 INFO L78 Accepts]: Start accepts. Automaton has 40761 states and 68341 transitions. Word has length 148 [2021-11-19 14:35:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:55,454 INFO L470 AbstractCegarLoop]: Abstraction has 40761 states and 68341 transitions. [2021-11-19 14:35:55,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 4 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-19 14:35:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 40761 states and 68341 transitions. [2021-11-19 14:35:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 14:35:55,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:55,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:55,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:55,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:55,677 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1960125735, now seen corresponding path program 1 times [2021-11-19 14:35:55,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:55,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738538946] [2021-11-19 14:35:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:55,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:55,679 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:55,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:35:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:35:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:35:56,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:35:57,405 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:57,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738538946] [2021-11-19 14:35:57,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738538946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:57,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:57,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:35:57,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320962419] [2021-11-19 14:35:57,406 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:57,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:35:57,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:57,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:35:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:35:57,407 INFO L87 Difference]: Start difference. First operand 40761 states and 68341 transitions. Second operand has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 14:36:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:05,018 INFO L93 Difference]: Finished difference Result 83767 states and 141296 transitions. [2021-11-19 14:36:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:36:05,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) Word has length 153 [2021-11-19 14:36:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:05,287 INFO L225 Difference]: With dead ends: 83767 [2021-11-19 14:36:05,288 INFO L226 Difference]: Without dead ends: 44927 [2021-11-19 14:36:05,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:36:05,425 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 2676 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 3383 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2752 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 3383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:05,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2752 Valid, 2400 Invalid, 4065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 3383 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-19 14:36:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44927 states. [2021-11-19 14:36:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44927 to 42417. [2021-11-19 14:36:08,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42417 states, 30883 states have (on average 1.5733251303306026) internal successors, (48589), 32916 states have internal predecessors, (48589), 9440 states have call successors, (9440), 1361 states have call predecessors, (9440), 2093 states have return successors, (12562), 9089 states have call predecessors, (12562), 9435 states have call successors, (12562) [2021-11-19 14:36:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42417 states to 42417 states and 70591 transitions. [2021-11-19 14:36:08,912 INFO L78 Accepts]: Start accepts. Automaton has 42417 states and 70591 transitions. Word has length 153 [2021-11-19 14:36:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:08,913 INFO L470 AbstractCegarLoop]: Abstraction has 42417 states and 70591 transitions. [2021-11-19 14:36:08,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.555555555555557) internal successors, (167), 9 states have internal predecessors, (167), 5 states have call successors, (29), 5 states have call predecessors, (29), 4 states have return successors, (27), 6 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-19 14:36:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 42417 states and 70591 transitions. [2021-11-19 14:36:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:36:08,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:08,920 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:36:08,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:09,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:09,148 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1254589965, now seen corresponding path program 1 times [2021-11-19 14:36:09,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:09,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970963706] [2021-11-19 14:36:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:09,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:09,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:09,151 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:09,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:36:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:36:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:36:10,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:36:11,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:11,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970963706] [2021-11-19 14:36:11,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970963706] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:11,436 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:11,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:36:11,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447108086] [2021-11-19 14:36:11,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:11,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:36:11,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:36:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:11,440 INFO L87 Difference]: Start difference. First operand 42417 states and 70591 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 5 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 9 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 14:36:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:25,740 INFO L93 Difference]: Finished difference Result 110972 states and 191417 transitions. [2021-11-19 14:36:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 14:36:25,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 5 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 9 states have call predecessors, (30), 4 states have call successors, (30) Word has length 158 [2021-11-19 14:36:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:26,431 INFO L225 Difference]: With dead ends: 110972 [2021-11-19 14:36:26,432 INFO L226 Difference]: Without dead ends: 66867 [2021-11-19 14:36:26,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:36:26,615 INFO L933 BasicCegarLoop]: 1114 mSDtfsCounter, 2226 mSDsluCounter, 3632 mSDsCounter, 0 mSdLazyCounter, 7163 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 4746 SdHoareTripleChecker+Invalid, 7739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 7163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:26,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 4746 Invalid, 7739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 7163 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-11-19 14:36:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66867 states. [2021-11-19 14:36:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66867 to 62701. [2021-11-19 14:36:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62701 states, 45530 states have (on average 1.5672962881616517) internal successors, (71359), 48749 states have internal predecessors, (71359), 14169 states have call successors, (14169), 2039 states have call predecessors, (14169), 3001 states have return successors, (19816), 13318 states have call predecessors, (19816), 14164 states have call successors, (19816) [2021-11-19 14:36:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62701 states to 62701 states and 105344 transitions. [2021-11-19 14:36:32,402 INFO L78 Accepts]: Start accepts. Automaton has 62701 states and 105344 transitions. Word has length 158 [2021-11-19 14:36:32,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:32,403 INFO L470 AbstractCegarLoop]: Abstraction has 62701 states and 105344 transitions. [2021-11-19 14:36:32,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 13 states have internal predecessors, (187), 5 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 9 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-19 14:36:32,403 INFO L276 IsEmpty]: Start isEmpty. Operand 62701 states and 105344 transitions. [2021-11-19 14:36:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:36:32,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:32,409 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 14:36:32,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:32,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:32,622 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1333098961, now seen corresponding path program 1 times [2021-11-19 14:36:32,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:32,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763219601] [2021-11-19 14:36:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:32,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:32,625 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:32,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7cfe67f-df9a-482c-b33e-6e4d22c97373/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:36:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:33,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 14:36:33,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:36:33,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:36:34,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:34,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763219601] [2021-11-19 14:36:34,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763219601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:34,662 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:34,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:36:34,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881539389] [2021-11-19 14:36:34,663 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:34,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:36:34,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:36:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:36:34,665 INFO L87 Difference]: Start difference. First operand 62701 states and 105344 transitions. Second operand has 13 states, 13 states have (on average 14.0) internal successors, (182), 11 states have internal predecessors, (182), 6 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 9 states have call predecessors, (30), 5 states have call successors, (30)