./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:30:16,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:30:16,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:30:16,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:30:16,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:30:16,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:30:16,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:30:16,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:30:16,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:30:16,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:30:16,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:30:16,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:30:16,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:30:16,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:30:16,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:30:16,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:30:16,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:30:16,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:30:16,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:30:16,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:30:16,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:30:16,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:30:16,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:30:16,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:30:16,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:30:16,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:30:16,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:30:16,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:30:16,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:30:16,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:30:16,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:30:16,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:30:16,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:30:16,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:30:16,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:30:16,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:30:16,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:30:16,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:30:16,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:30:16,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:30:16,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:30:16,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:30:16,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:30:16,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:30:16,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:30:16,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:30:16,370 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:30:16,370 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:30:16,370 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:30:16,371 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:30:16,371 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:30:16,371 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:30:16,371 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:30:16,371 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:30:16,372 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:30:16,372 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:30:16,372 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:30:16,372 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:30:16,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:30:16,373 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:30:16,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:30:16,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:30:16,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:30:16,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:30:16,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:30:16,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:30:16,375 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:30:16,375 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:30:16,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:30:16,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:30:16,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:30:16,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:30:16,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:30:16,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:16,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:30:16,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:30:16,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:30:16,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:30:16,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:30:16,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:30:16,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:30:16,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:30:16,382 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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2021-11-19 14:30:16,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:30:16,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:30:16,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:30:16,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:30:16,702 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:30:16,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-19 14:30:16,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/271447bc3/c8bdf8c1b7df4bb8b6c1005bc869c3e9/FLAG6282f9380 [2021-11-19 14:30:17,471 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:30:17,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-19 14:30:17,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/271447bc3/c8bdf8c1b7df4bb8b6c1005bc869c3e9/FLAG6282f9380 [2021-11-19 14:30:17,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/271447bc3/c8bdf8c1b7df4bb8b6c1005bc869c3e9 [2021-11-19 14:30:17,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:30:17,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:30:17,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:17,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:30:17,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:30:17,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:17" (1/1) ... [2021-11-19 14:30:17,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2019dd3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:17, skipping insertion in model container [2021-11-19 14:30:17,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:17" (1/1) ... [2021-11-19 14:30:17,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:30:17,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:17,960 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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-19 14:30:18,447 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:18,467 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 14:30:18,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@32da251c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:18, skipping insertion in model container [2021-11-19 14:30:18,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:18,469 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:30:18,472 INFO L158 Benchmark]: Toolchain (without parser) took 849.95ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 54.7MB in the beginning and 81.9MB in the end (delta: -27.2MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-19 14:30:18,473 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 62.2MB in the beginning and 62.2MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:30:18,475 INFO L158 Benchmark]: CACSL2BoogieTranslator took 847.52ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 54.5MB in the beginning and 81.9MB in the end (delta: -27.4MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2021-11-19 14:30:18,478 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 92.3MB. Free memory was 62.2MB in the beginning and 62.2MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 847.52ms. Allocated memory was 92.3MB in the beginning and 119.5MB in the end (delta: 27.3MB). Free memory was 54.5MB in the beginning and 81.9MB in the end (delta: -27.4MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 86]: 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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:30:20,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:30:20,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:30:20,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:30:20,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:30:20,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:30:20,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:30:20,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:30:20,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:30:20,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:30:20,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:30:20,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:30:20,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:30:20,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:30:20,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:30:20,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:30:20,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:30:20,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:30:20,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:30:20,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:30:20,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:30:20,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:30:20,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:30:20,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:30:20,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:30:20,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:30:20,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:30:20,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:30:20,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:30:20,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:30:20,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:30:20,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:30:20,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:30:20,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:30:20,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:30:20,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:30:20,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:30:20,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:30:20,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:30:20,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:30:20,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:30:20,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:30:21,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:30:21,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:30:21,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:30:21,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:30:21,022 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:30:21,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:30:21,022 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:30:21,022 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:30:21,023 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:30:21,023 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:30:21,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:30:21,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:30:21,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:30:21,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:30:21,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:30:21,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:30:21,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:30:21,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:30:21,027 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:30:21,028 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:30:21,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:30:21,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:30:21,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:30:21,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:30:21,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:30:21,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:30:21,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:30:21,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:21,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:30:21,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:30:21,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:30:21,030 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:30:21,031 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:30:21,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:30:21,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:30:21,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:30:21,032 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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79cd0e89b784c92aef5addf1ffd5f426704de99d9c0060c88cf4cdcbae792c3b [2021-11-19 14:30:21,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:30:21,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:30:21,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:30:21,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:30:21,513 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:30:21,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-19 14:30:21,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/0b129062d/c29880361381469fb45c29a073979c5b/FLAG6f2d10599 [2021-11-19 14:30:22,456 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:30:22,456 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c [2021-11-19 14:30:22,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/0b129062d/c29880361381469fb45c29a073979c5b/FLAG6f2d10599 [2021-11-19 14:30:22,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/data/0b129062d/c29880361381469fb45c29a073979c5b [2021-11-19 14:30:22,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:30:22,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:30:22,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:22,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:30:22,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:30:22,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:22" (1/1) ... [2021-11-19 14:30:22,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcc2856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:22, skipping insertion in model container [2021-11-19 14:30:22,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:22" (1/1) ... [2021-11-19 14:30:22,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:30:22,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:22,896 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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-19 14:30:23,274 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:23,288 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:30:23,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:23,311 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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-19 14:30:23,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:23,460 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:30:23,473 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_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/sv-benchmarks/c/product-lines/elevator_spec3_product11.cil.c[1545,1558] [2021-11-19 14:30:23,560 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:23,602 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:30:23,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23 WrapperNode [2021-11-19 14:30:23,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:23,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:30:23,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:30:23,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:30:23,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,736 INFO L137 Inliner]: procedures = 93, calls = 344, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1036 [2021-11-19 14:30:23,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:30:23,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:30:23,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:30:23,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:30:23,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:30:23,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:30:23,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:30:23,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:30:23,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:23,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:30:23,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:30:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:30:23,969 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:30:23,969 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:30:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:30:23,970 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:30:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:30:23,970 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:30:23,970 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:30:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:30:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:30:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:30:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:30:23,971 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:30:23,971 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:30:23,972 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:30:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:30:23,972 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:30:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:30:23,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:30:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:30:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:30:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:30:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:30:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:30:23,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:30:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:30:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:30:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:30:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 14:30:23,974 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 14:30:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:30:23,975 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:30:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:30:23,975 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-19 14:30:23,975 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 14:30:23,976 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 14:30:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:30:23,976 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:30:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:30:23,976 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:30:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:30:23,977 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:30:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:30:23,977 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:30:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:30:23,977 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:30:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:30:23,978 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:30:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:30:23,978 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:30:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:30:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:30:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:30:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:30:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:30:23,980 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:30:24,179 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:30:24,197 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:30:25,545 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:30:25,565 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:30:25,566 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:30:25,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:25 BoogieIcfgContainer [2021-11-19 14:30:25,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:30:25,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:30:25,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:30:25,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:30:25,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:30:22" (1/3) ... [2021-11-19 14:30:25,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697da2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:25, skipping insertion in model container [2021-11-19 14:30:25,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (2/3) ... [2021-11-19 14:30:25,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697da2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:25, skipping insertion in model container [2021-11-19 14:30:25,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:25" (3/3) ... [2021-11-19 14:30:25,581 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product11.cil.c [2021-11-19 14:30:25,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:30:25,587 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:30:25,637 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:30:25,645 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 14:30:25,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:30:25,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 583 states, 449 states have (on average 1.6748329621380846) internal successors, (752), 467 states have internal predecessors, (752), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-19 14:30:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:30:25,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:25,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:25,715 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash -766320480, now seen corresponding path program 1 times [2021-11-19 14:30:25,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:25,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925280899] [2021-11-19 14:30:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:25,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:25,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:25,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:25,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:30:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:26,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:26,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:27,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:27,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925280899] [2021-11-19 14:30:27,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925280899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:27,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:27,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:30:27,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379545861] [2021-11-19 14:30:27,190 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:27,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:30:27,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:27,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:30:27,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:30:27,236 INFO L87 Difference]: Start difference. First operand has 583 states, 449 states have (on average 1.6748329621380846) internal successors, (752), 467 states have internal predecessors, (752), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:27,639 INFO L93 Difference]: Finished difference Result 1169 states and 1949 transitions. [2021-11-19 14:30:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:30:27,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2021-11-19 14:30:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:27,672 INFO L225 Difference]: With dead ends: 1169 [2021-11-19 14:30:27,673 INFO L226 Difference]: Without dead ends: 594 [2021-11-19 14:30:27,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:27,695 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 118 mSDsluCounter, 5581 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:27,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 6527 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-19 14:30:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 586. [2021-11-19 14:30:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 452 states have (on average 1.665929203539823) internal successors, (753), 470 states have internal predecessors, (753), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-19 14:30:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 966 transitions. [2021-11-19 14:30:27,878 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 966 transitions. Word has length 113 [2021-11-19 14:30:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:27,879 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 966 transitions. [2021-11-19 14:30:27,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:27,881 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 966 transitions. [2021-11-19 14:30:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:30:27,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:27,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:27,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:28,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:28,111 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1891470132, now seen corresponding path program 1 times [2021-11-19 14:30:28,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:28,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717906480] [2021-11-19 14:30:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:28,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:28,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:28,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:28,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:30:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:28,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:28,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:29,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:29,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717906480] [2021-11-19 14:30:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717906480] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:29,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:29,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:30:29,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417184825] [2021-11-19 14:30:29,293 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:29,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:30:29,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:30:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:30:29,297 INFO L87 Difference]: Start difference. First operand 586 states and 966 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:29,593 INFO L93 Difference]: Finished difference Result 1177 states and 1950 transitions. [2021-11-19 14:30:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:30:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 114 [2021-11-19 14:30:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:29,600 INFO L225 Difference]: With dead ends: 1177 [2021-11-19 14:30:29,601 INFO L226 Difference]: Without dead ends: 607 [2021-11-19 14:30:29,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:29,606 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 104 mSDsluCounter, 7369 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 8316 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:29,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 8316 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-19 14:30:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 599. [2021-11-19 14:30:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 462 states have (on average 1.6623376623376624) internal successors, (768), 482 states have internal predecessors, (768), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-19 14:30:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 985 transitions. [2021-11-19 14:30:29,652 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 985 transitions. Word has length 114 [2021-11-19 14:30:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:29,652 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 985 transitions. [2021-11-19 14:30:29,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 985 transitions. [2021-11-19 14:30:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:30:29,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:29,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:29,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:29,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:29,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 715563076, now seen corresponding path program 1 times [2021-11-19 14:30:29,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:29,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487625001] [2021-11-19 14:30:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:29,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:29,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:29,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:30:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:30,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:30,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:30,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:30,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487625001] [2021-11-19 14:30:30,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487625001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:30,929 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:30,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:30:30,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762138154] [2021-11-19 14:30:30,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:30,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:30:30,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:30:30,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:30:30,933 INFO L87 Difference]: Start difference. First operand 599 states and 985 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:31,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:31,178 INFO L93 Difference]: Finished difference Result 1203 states and 1989 transitions. [2021-11-19 14:30:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:30:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 115 [2021-11-19 14:30:31,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:31,185 INFO L225 Difference]: With dead ends: 1203 [2021-11-19 14:30:31,185 INFO L226 Difference]: Without dead ends: 620 [2021-11-19 14:30:31,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:31,191 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 185 mSDsluCounter, 3756 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 4703 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:31,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 4703 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-19 14:30:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 612. [2021-11-19 14:30:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 472 states have (on average 1.6588983050847457) internal successors, (783), 494 states have internal predecessors, (783), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-19 14:30:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1004 transitions. [2021-11-19 14:30:31,232 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1004 transitions. Word has length 115 [2021-11-19 14:30:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:31,232 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1004 transitions. [2021-11-19 14:30:31,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1004 transitions. [2021-11-19 14:30:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:30:31,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:31,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:31,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:31,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:31,457 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:31,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash 954112600, now seen corresponding path program 1 times [2021-11-19 14:30:31,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:31,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662550968] [2021-11-19 14:30:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:31,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:31,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:31,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:30:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:31,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:32,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:32,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:32,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662550968] [2021-11-19 14:30:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662550968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:32,514 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:30:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656622471] [2021-11-19 14:30:32,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:32,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:30:32,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:32,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:30:32,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:30:32,517 INFO L87 Difference]: Start difference. First operand 612 states and 1004 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:32,776 INFO L93 Difference]: Finished difference Result 1225 states and 2022 transitions. [2021-11-19 14:30:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:30:32,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 116 [2021-11-19 14:30:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:32,784 INFO L225 Difference]: With dead ends: 1225 [2021-11-19 14:30:32,784 INFO L226 Difference]: Without dead ends: 629 [2021-11-19 14:30:32,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:32,791 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 103 mSDsluCounter, 5472 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 6418 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:32,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 6418 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-19 14:30:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2021-11-19 14:30:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 482 states have (on average 1.6556016597510372) internal successors, (798), 506 states have internal predecessors, (798), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-19 14:30:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1023 transitions. [2021-11-19 14:30:32,836 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1023 transitions. Word has length 116 [2021-11-19 14:30:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:32,836 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1023 transitions. [2021-11-19 14:30:32,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:32,837 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1023 transitions. [2021-11-19 14:30:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:30:32,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:32,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:32,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:33,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:33,063 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1701773273, now seen corresponding path program 1 times [2021-11-19 14:30:33,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:33,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190855492] [2021-11-19 14:30:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:33,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:33,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:33,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:33,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:30:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:30:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:33,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:34,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:34,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190855492] [2021-11-19 14:30:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190855492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:34,131 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:34,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:30:34,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397873323] [2021-11-19 14:30:34,131 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:34,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:30:34,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:30:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:30:34,134 INFO L87 Difference]: Start difference. First operand 625 states and 1023 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:30:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:34,314 INFO L93 Difference]: Finished difference Result 1245 states and 2052 transitions. [2021-11-19 14:30:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:30:34,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 116 [2021-11-19 14:30:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:34,324 INFO L225 Difference]: With dead ends: 1245 [2021-11-19 14:30:34,324 INFO L226 Difference]: Without dead ends: 636 [2021-11-19 14:30:34,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 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 14:30:34,333 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 181 mSDsluCounter, 4538 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 5472 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:34,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 5472 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-19 14:30:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 634. [2021-11-19 14:30:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 490 states have (on average 1.6551020408163266) internal successors, (811), 515 states have internal predecessors, (811), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-19 14:30:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1040 transitions. [2021-11-19 14:30:34,382 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1040 transitions. Word has length 116 [2021-11-19 14:30:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:34,383 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1040 transitions. [2021-11-19 14:30:34,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:30:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1040 transitions. [2021-11-19 14:30:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:30:34,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:34,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:34,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:34,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:34,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:34,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2091143144, now seen corresponding path program 1 times [2021-11-19 14:30:34,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:34,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32381370] [2021-11-19 14:30:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:34,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:34,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:34,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:34,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:30:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:30:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:35,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:35,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:35,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32381370] [2021-11-19 14:30:35,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32381370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:35,869 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:35,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:30:35,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866778994] [2021-11-19 14:30:35,870 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:35,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:30:35,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:30:35,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:30:35,872 INFO L87 Difference]: Start difference. First operand 634 states and 1040 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:36,189 INFO L93 Difference]: Finished difference Result 1267 states and 2086 transitions. [2021-11-19 14:30:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:30:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-19 14:30:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:36,201 INFO L225 Difference]: With dead ends: 1267 [2021-11-19 14:30:36,201 INFO L226 Difference]: Without dead ends: 640 [2021-11-19 14:30:36,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:30:36,210 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 219 mSDsluCounter, 5477 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:36,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 6402 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-19 14:30:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 630. [2021-11-19 14:30:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 486 states have (on average 1.6440329218106995) internal successors, (799), 511 states have internal predecessors, (799), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-19 14:30:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1028 transitions. [2021-11-19 14:30:36,250 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1028 transitions. Word has length 117 [2021-11-19 14:30:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:36,250 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1028 transitions. [2021-11-19 14:30:36,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1028 transitions. [2021-11-19 14:30:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:30:36,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:36,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:36,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:36,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:36,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash -275249128, now seen corresponding path program 1 times [2021-11-19 14:30:36,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:36,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604816399] [2021-11-19 14:30:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:36,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:36,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:36,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:30:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:36,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:30:36,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:37,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:37,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604816399] [2021-11-19 14:30:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604816399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:37,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:37,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:30:37,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755013865] [2021-11-19 14:30:37,366 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:37,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:37,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:37,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:30:37,368 INFO L87 Difference]: Start difference. First operand 630 states and 1028 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:30:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:37,446 INFO L93 Difference]: Finished difference Result 1236 states and 2021 transitions. [2021-11-19 14:30:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:30:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2021-11-19 14:30:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:37,454 INFO L225 Difference]: With dead ends: 1236 [2021-11-19 14:30:37,454 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 14:30:37,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:30:37,463 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 32 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:37,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1867 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:30:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 14:30:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 14:30:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6295399515738498) internal successors, (673), 429 states have internal predecessors, (673), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:30:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 882 transitions. [2021-11-19 14:30:37,495 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 882 transitions. Word has length 117 [2021-11-19 14:30:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:37,495 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 882 transitions. [2021-11-19 14:30:37,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:30:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 882 transitions. [2021-11-19 14:30:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:30:37,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:37,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:37,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:37,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:37,715 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:37,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1099068104, now seen corresponding path program 1 times [2021-11-19 14:30:37,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:37,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210754582] [2021-11-19 14:30:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:37,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:37,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:37,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:30:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:30:38,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:38,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:38,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:38,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210754582] [2021-11-19 14:30:38,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210754582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:38,786 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:38,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:30:38,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868118582] [2021-11-19 14:30:38,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:38,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:30:38,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:38,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:30:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:30:38,788 INFO L87 Difference]: Start difference. First operand 544 states and 882 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:39,006 INFO L93 Difference]: Finished difference Result 1075 states and 1752 transitions. [2021-11-19 14:30:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 118 [2021-11-19 14:30:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:39,013 INFO L225 Difference]: With dead ends: 1075 [2021-11-19 14:30:39,013 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 14:30:39,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:30:39,019 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 50 mSDsluCounter, 7741 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 8606 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:39,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 8606 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 14:30:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 14:30:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6271186440677967) internal successors, (672), 429 states have internal predecessors, (672), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:30:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 881 transitions. [2021-11-19 14:30:39,049 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 881 transitions. Word has length 118 [2021-11-19 14:30:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:39,049 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 881 transitions. [2021-11-19 14:30:39,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 881 transitions. [2021-11-19 14:30:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:30:39,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:39,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:39,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:39,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:39,274 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1332354413, now seen corresponding path program 1 times [2021-11-19 14:30:39,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:39,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153291355] [2021-11-19 14:30:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:39,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:39,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:39,276 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:39,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:30:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:30:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:39,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:40,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:40,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153291355] [2021-11-19 14:30:40,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153291355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:40,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:40,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:30:40,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164210908] [2021-11-19 14:30:40,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:40,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:30:40,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:30:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:30:40,320 INFO L87 Difference]: Start difference. First operand 544 states and 881 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:40,531 INFO L93 Difference]: Finished difference Result 1075 states and 1750 transitions. [2021-11-19 14:30:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 119 [2021-11-19 14:30:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:40,537 INFO L225 Difference]: With dead ends: 1075 [2021-11-19 14:30:40,537 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 14:30:40,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:30:40,544 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 35 mSDsluCounter, 6875 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 7740 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:40,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 7740 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 14:30:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 14:30:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6246973365617434) internal successors, (671), 429 states have internal predecessors, (671), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:30:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 880 transitions. [2021-11-19 14:30:40,569 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 880 transitions. Word has length 119 [2021-11-19 14:30:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:40,570 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 880 transitions. [2021-11-19 14:30:40,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 880 transitions. [2021-11-19 14:30:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:30:40,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:40,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:40,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:40,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:40,795 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1940764509, now seen corresponding path program 1 times [2021-11-19 14:30:40,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:40,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958074967] [2021-11-19 14:30:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:40,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:40,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:40,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:40,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:30:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:30:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:41,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:30:41,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:41,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958074967] [2021-11-19 14:30:41,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958074967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:41,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:41,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:30:41,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042898324] [2021-11-19 14:30:41,970 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:41,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:30:41,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:30:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:30:41,972 INFO L87 Difference]: Start difference. First operand 544 states and 880 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:42,177 INFO L93 Difference]: Finished difference Result 1075 states and 1748 transitions. [2021-11-19 14:30:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:42,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2021-11-19 14:30:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:42,184 INFO L225 Difference]: With dead ends: 1075 [2021-11-19 14:30:42,185 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 14:30:42,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:30:42,190 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 40 mSDsluCounter, 6877 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 7742 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:42,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 7742 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 14:30:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 14:30:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 413 states have (on average 1.6222760290556901) internal successors, (670), 429 states have internal predecessors, (670), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:30:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 879 transitions. [2021-11-19 14:30:42,218 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 879 transitions. Word has length 120 [2021-11-19 14:30:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:42,218 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 879 transitions. [2021-11-19 14:30:42,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:30:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 879 transitions. [2021-11-19 14:30:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:30:42,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:42,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:42,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:42,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:42,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1870364402, now seen corresponding path program 1 times [2021-11-19 14:30:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:42,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452445222] [2021-11-19 14:30:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:42,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:42,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:42,446 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:42,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:30:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:30:42,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:30:43,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:30:43,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:43,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452445222] [2021-11-19 14:30:43,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452445222] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:43,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:43,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:30:43,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928306898] [2021-11-19 14:30:43,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:43,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:30:43,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:30:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:43,562 INFO L87 Difference]: Start difference. First operand 544 states and 879 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:30:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:44,912 INFO L93 Difference]: Finished difference Result 1554 states and 2534 transitions. [2021-11-19 14:30:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:30:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2021-11-19 14:30:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:44,925 INFO L225 Difference]: With dead ends: 1554 [2021-11-19 14:30:44,925 INFO L226 Difference]: Without dead ends: 1028 [2021-11-19 14:30:44,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:44,935 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 752 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 4111 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:44,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 4111 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:30:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-11-19 14:30:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1019. [2021-11-19 14:30:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 776 states have (on average 1.5850515463917525) internal successors, (1230), 806 states have internal predecessors, (1230), 196 states have call successors, (196), 49 states have call predecessors, (196), 46 states have return successors, (197), 188 states have call predecessors, (197), 192 states have call successors, (197) [2021-11-19 14:30:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1623 transitions. [2021-11-19 14:30:45,016 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1623 transitions. Word has length 121 [2021-11-19 14:30:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:45,018 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 1623 transitions. [2021-11-19 14:30:45,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:30:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1623 transitions. [2021-11-19 14:30:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:30:45,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:45,029 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:45,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:45,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:45,249 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash -930701968, now seen corresponding path program 1 times [2021-11-19 14:30:45,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:45,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156301764] [2021-11-19 14:30:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:45,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:45,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:45,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:30:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:45,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:30:45,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:30:45,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 14:30:46,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:46,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156301764] [2021-11-19 14:30:46,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156301764] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:46,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:46,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:30:46,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889198007] [2021-11-19 14:30:46,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:46,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:30:46,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:30:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:30:46,287 INFO L87 Difference]: Start difference. First operand 1019 states and 1623 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:30:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:47,274 INFO L93 Difference]: Finished difference Result 2559 states and 4141 transitions. [2021-11-19 14:30:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:30:47,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 123 [2021-11-19 14:30:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:47,291 INFO L225 Difference]: With dead ends: 2559 [2021-11-19 14:30:47,291 INFO L226 Difference]: Without dead ends: 1558 [2021-11-19 14:30:47,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:30:47,302 INFO L933 BasicCegarLoop]: 1040 mSDtfsCounter, 861 mSDsluCounter, 3549 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 4589 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:47,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 4589 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:30:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-11-19 14:30:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1549. [2021-11-19 14:30:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1180 states have (on average 1.5991525423728814) internal successors, (1887), 1225 states have internal predecessors, (1887), 296 states have call successors, (296), 72 states have call predecessors, (296), 72 states have return successors, (318), 289 states have call predecessors, (318), 291 states have call successors, (318) [2021-11-19 14:30:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 2501 transitions. [2021-11-19 14:30:47,388 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 2501 transitions. Word has length 123 [2021-11-19 14:30:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:47,389 INFO L470 AbstractCegarLoop]: Abstraction has 1549 states and 2501 transitions. [2021-11-19 14:30:47,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 14:30:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 2501 transitions. [2021-11-19 14:30:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:30:47,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:47,394 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:47,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:47,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:47,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash -47328057, now seen corresponding path program 1 times [2021-11-19 14:30:47,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:47,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911090047] [2021-11-19 14:30:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:47,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:47,618 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:47,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:30:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:30:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:30:48,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:30:48,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:48,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911090047] [2021-11-19 14:30:48,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911090047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:48,625 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:48,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:30:48,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144735194] [2021-11-19 14:30:48,625 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:48,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:30:48,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:30:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:48,627 INFO L87 Difference]: Start difference. First operand 1549 states and 2501 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:30:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:50,894 INFO L93 Difference]: Finished difference Result 5526 states and 9377 transitions. [2021-11-19 14:30:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 126 [2021-11-19 14:30:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:50,937 INFO L225 Difference]: With dead ends: 5526 [2021-11-19 14:30:50,937 INFO L226 Difference]: Without dead ends: 3995 [2021-11-19 14:30:50,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:30:50,952 INFO L933 BasicCegarLoop]: 1340 mSDtfsCounter, 1166 mSDsluCounter, 5459 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 6799 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:50,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1253 Valid, 6799 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 14:30:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-19 14:30:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3044. [2021-11-19 14:30:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2323 states have (on average 1.5949203616013776) internal successors, (3705), 2414 states have internal predecessors, (3705), 572 states have call successors, (572), 141 states have call predecessors, (572), 148 states have return successors, (733), 564 states have call predecessors, (733), 564 states have call successors, (733) [2021-11-19 14:30:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 5010 transitions. [2021-11-19 14:30:51,222 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 5010 transitions. Word has length 126 [2021-11-19 14:30:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:51,222 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 5010 transitions. [2021-11-19 14:30:51,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:30:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 5010 transitions. [2021-11-19 14:30:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:30:51,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:51,227 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:51,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:51,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:51,444 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:51,445 INFO L85 PathProgramCache]: Analyzing trace with hash -823796772, now seen corresponding path program 1 times [2021-11-19 14:30:51,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:51,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255026459] [2021-11-19 14:30:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:51,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:51,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:51,447 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:51,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:30:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:30:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:52,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:30:52,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:30:52,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:52,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255026459] [2021-11-19 14:30:52,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255026459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:52,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:52,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:30:52,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571571311] [2021-11-19 14:30:52,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:52,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:52,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:52,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:52,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:30:52,325 INFO L87 Difference]: Start difference. First operand 3044 states and 5010 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:30:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:52,595 INFO L93 Difference]: Finished difference Result 6088 states and 10148 transitions. [2021-11-19 14:30:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:30:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2021-11-19 14:30:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:52,628 INFO L225 Difference]: With dead ends: 6088 [2021-11-19 14:30:52,629 INFO L226 Difference]: Without dead ends: 3062 [2021-11-19 14:30:52,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:30:52,699 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 19 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:52,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2550 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-11-19 14:30:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3056. [2021-11-19 14:30:52,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 2332 states have (on average 1.5913379073756433) internal successors, (3711), 2423 states have internal predecessors, (3711), 572 states have call successors, (572), 147 states have call predecessors, (572), 151 states have return successors, (717), 561 states have call predecessors, (717), 564 states have call successors, (717) [2021-11-19 14:30:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 5000 transitions. [2021-11-19 14:30:52,871 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 5000 transitions. Word has length 127 [2021-11-19 14:30:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:52,872 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 5000 transitions. [2021-11-19 14:30:52,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:30:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 5000 transitions. [2021-11-19 14:30:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 14:30:52,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:52,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:52,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:53,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:53,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 786959458, now seen corresponding path program 1 times [2021-11-19 14:30:53,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:53,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168255904] [2021-11-19 14:30:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:53,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:53,094 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:53,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:30:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:53,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:30:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:30:53,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:54,073 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 14:30:54,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:54,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168255904] [2021-11-19 14:30:54,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168255904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:54,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:54,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:30:54,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878767308] [2021-11-19 14:30:54,075 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:54,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:30:54,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:54,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:30:54,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:54,076 INFO L87 Difference]: Start difference. First operand 3056 states and 5000 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:30:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:56,441 INFO L93 Difference]: Finished difference Result 10976 states and 19123 transitions. [2021-11-19 14:30:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:30:56,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 135 [2021-11-19 14:30:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:56,548 INFO L225 Difference]: With dead ends: 10976 [2021-11-19 14:30:56,548 INFO L226 Difference]: Without dead ends: 7938 [2021-11-19 14:30:56,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:30:56,574 INFO L933 BasicCegarLoop]: 1324 mSDtfsCounter, 1144 mSDsluCounter, 5219 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 6543 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:56,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 6543 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:30:56,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2021-11-19 14:30:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 6088. [2021-11-19 14:30:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 4648 states have (on average 1.5867039586919105) internal successors, (7375), 4834 states have internal predecessors, (7375), 1127 states have call successors, (1127), 291 states have call predecessors, (1127), 312 states have return successors, (1684), 1114 states have call predecessors, (1684), 1113 states have call successors, (1684) [2021-11-19 14:30:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 10186 transitions. [2021-11-19 14:30:57,185 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 10186 transitions. Word has length 135 [2021-11-19 14:30:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:57,186 INFO L470 AbstractCegarLoop]: Abstraction has 6088 states and 10186 transitions. [2021-11-19 14:30:57,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:30:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 10186 transitions. [2021-11-19 14:30:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:30:57,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:57,192 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:57,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-19 14:30:57,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:57,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 469307881, now seen corresponding path program 1 times [2021-11-19 14:30:57,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:57,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288239655] [2021-11-19 14:30:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:57,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:57,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:57,396 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:57,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:30:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:30:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:30:57,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:30:58,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:58,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288239655] [2021-11-19 14:30:58,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288239655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:58,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:58,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:30:58,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455432227] [2021-11-19 14:30:58,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:58,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:30:58,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:30:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:30:58,260 INFO L87 Difference]: Start difference. First operand 6088 states and 10186 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:30:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:58,812 INFO L93 Difference]: Finished difference Result 12230 states and 20799 transitions. [2021-11-19 14:30:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:30:58,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 136 [2021-11-19 14:30:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:58,879 INFO L225 Difference]: With dead ends: 12230 [2021-11-19 14:30:58,880 INFO L226 Difference]: Without dead ends: 6160 [2021-11-19 14:30:58,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:30:58,937 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 21 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:58,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3393 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-11-19 14:30:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 6148. [2021-11-19 14:30:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6148 states, 4702 states have (on average 1.5812420246703531) internal successors, (7435), 4876 states have internal predecessors, (7435), 1127 states have call successors, (1127), 315 states have call predecessors, (1127), 318 states have return successors, (1660), 1108 states have call predecessors, (1660), 1113 states have call successors, (1660) [2021-11-19 14:30:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6148 states to 6148 states and 10222 transitions. [2021-11-19 14:30:59,373 INFO L78 Accepts]: Start accepts. Automaton has 6148 states and 10222 transitions. Word has length 136 [2021-11-19 14:30:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:59,374 INFO L470 AbstractCegarLoop]: Abstraction has 6148 states and 10222 transitions. [2021-11-19 14:30:59,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:30:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6148 states and 10222 transitions. [2021-11-19 14:30:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:30:59,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:59,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:59,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-19 14:30:59,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:59,598 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash -215584710, now seen corresponding path program 1 times [2021-11-19 14:30:59,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:59,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820047446] [2021-11-19 14:30:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:59,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:59,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:59,600 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:59,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:30:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:59,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:30:59,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:31:00,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:31:00,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:00,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820047446] [2021-11-19 14:31:00,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820047446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:00,691 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:00,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:31:00,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442028653] [2021-11-19 14:31:00,692 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:00,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:31:00,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:31:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:00,694 INFO L87 Difference]: Start difference. First operand 6148 states and 10222 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 14:31:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:03,498 INFO L93 Difference]: Finished difference Result 22066 states and 39954 transitions. [2021-11-19 14:31:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:31:03,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 145 [2021-11-19 14:31:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:03,644 INFO L225 Difference]: With dead ends: 22066 [2021-11-19 14:31:03,644 INFO L226 Difference]: Without dead ends: 15936 [2021-11-19 14:31:03,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:03,706 INFO L933 BasicCegarLoop]: 1320 mSDtfsCounter, 1122 mSDsluCounter, 5218 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 6538 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:03,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1194 Valid, 6538 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:31:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15936 states. [2021-11-19 14:31:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15936 to 12320. [2021-11-19 14:31:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12320 states, 9421 states have (on average 1.5764780808831333) internal successors, (14852), 9779 states have internal predecessors, (14852), 2240 states have call successors, (2240), 627 states have call predecessors, (2240), 658 states have return successors, (4025), 2217 states have call predecessors, (4025), 2214 states have call successors, (4025) [2021-11-19 14:31:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12320 states to 12320 states and 21117 transitions. [2021-11-19 14:31:04,870 INFO L78 Accepts]: Start accepts. Automaton has 12320 states and 21117 transitions. Word has length 145 [2021-11-19 14:31:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:04,871 INFO L470 AbstractCegarLoop]: Abstraction has 12320 states and 21117 transitions. [2021-11-19 14:31:04,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 14:31:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12320 states and 21117 transitions. [2021-11-19 14:31:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:31:04,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:04,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:04,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:05,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:05,099 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash 655205209, now seen corresponding path program 1 times [2021-11-19 14:31:05,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:05,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181525548] [2021-11-19 14:31:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:05,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:05,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:05,102 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:05,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:31:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:05,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:31:05,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:31:06,253 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:06,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181525548] [2021-11-19 14:31:06,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181525548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:06,254 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:06,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:31:06,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314978835] [2021-11-19 14:31:06,255 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:06,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:06,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:31:06,263 INFO L87 Difference]: Start difference. First operand 12320 states and 21117 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 14:31:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:07,457 INFO L93 Difference]: Finished difference Result 24766 states and 43519 transitions. [2021-11-19 14:31:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:31:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 146 [2021-11-19 14:31:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:07,549 INFO L225 Difference]: With dead ends: 24766 [2021-11-19 14:31:07,550 INFO L226 Difference]: Without dead ends: 12464 [2021-11-19 14:31:07,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:31:07,694 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 21 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:07,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3393 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:31:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12464 states. [2021-11-19 14:31:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12464 to 12440. [2021-11-19 14:31:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12440 states, 9529 states have (on average 1.5712036939867773) internal successors, (14972), 9887 states have internal predecessors, (14972), 2240 states have call successors, (2240), 651 states have call predecessors, (2240), 670 states have return successors, (3993), 2205 states have call predecessors, (3993), 2214 states have call successors, (3993) [2021-11-19 14:31:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12440 states to 12440 states and 21205 transitions. [2021-11-19 14:31:08,771 INFO L78 Accepts]: Start accepts. Automaton has 12440 states and 21205 transitions. Word has length 146 [2021-11-19 14:31:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:08,772 INFO L470 AbstractCegarLoop]: Abstraction has 12440 states and 21205 transitions. [2021-11-19 14:31:08,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 14:31:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 12440 states and 21205 transitions. [2021-11-19 14:31:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:31:08,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:08,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:08,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:08,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:08,996 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash -557230577, now seen corresponding path program 1 times [2021-11-19 14:31:08,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:08,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806870815] [2021-11-19 14:31:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:08,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:08,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:08,998 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:09,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:31:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:09,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:31:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:31:09,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:31:10,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:10,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806870815] [2021-11-19 14:31:10,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806870815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:10,188 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:10,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:31:10,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273758762] [2021-11-19 14:31:10,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:10,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:31:10,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:31:10,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:31:10,190 INFO L87 Difference]: Start difference. First operand 12440 states and 21205 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 14:31:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:13,538 INFO L93 Difference]: Finished difference Result 44494 states and 85704 transitions. [2021-11-19 14:31:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:31:13,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 156 [2021-11-19 14:31:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:13,851 INFO L225 Difference]: With dead ends: 44494 [2021-11-19 14:31:13,852 INFO L226 Difference]: Without dead ends: 32072 [2021-11-19 14:31:14,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:14,427 INFO L933 BasicCegarLoop]: 1154 mSDtfsCounter, 1181 mSDsluCounter, 4063 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 5217 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:14,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 5217 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:31:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32072 states. [2021-11-19 14:31:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32072 to 24988. [2021-11-19 14:31:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24988 states, 19132 states have (on average 1.5664332009199247) internal successors, (29969), 19870 states have internal predecessors, (29969), 4469 states have call successors, (4469), 1299 states have call predecessors, (4469), 1386 states have return successors, (10182), 4426 states have call predecessors, (10182), 4419 states have call successors, (10182) [2021-11-19 14:31:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24988 states to 24988 states and 44620 transitions. [2021-11-19 14:31:17,602 INFO L78 Accepts]: Start accepts. Automaton has 24988 states and 44620 transitions. Word has length 156 [2021-11-19 14:31:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:17,603 INFO L470 AbstractCegarLoop]: Abstraction has 24988 states and 44620 transitions. [2021-11-19 14:31:17,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 14:31:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 24988 states and 44620 transitions. [2021-11-19 14:31:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:31:17,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:17,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:17,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:17,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:17,827 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash -447100804, now seen corresponding path program 1 times [2021-11-19 14:31:17,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:17,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251243098] [2021-11-19 14:31:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:17,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:17,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:17,831 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:17,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:31:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:31:18,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:31:19,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:19,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251243098] [2021-11-19 14:31:19,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251243098] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:19,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:19,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:31:19,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138328175] [2021-11-19 14:31:19,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:19,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:19,411 INFO L87 Difference]: Start difference. First operand 24988 states and 44620 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:22,340 INFO L93 Difference]: Finished difference Result 50150 states and 94296 transitions. [2021-11-19 14:31:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:22,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-19 14:31:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:22,557 INFO L225 Difference]: With dead ends: 50150 [2021-11-19 14:31:22,557 INFO L226 Difference]: Without dead ends: 25180 [2021-11-19 14:31:23,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:23,415 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 771 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:23,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 2158 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:31:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25180 states. [2021-11-19 14:31:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25180 to 25180. [2021-11-19 14:31:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25180 states, 19276 states have (on average 1.5622017015978418) internal successors, (30113), 20014 states have internal predecessors, (30113), 4469 states have call successors, (4469), 1347 states have call predecessors, (4469), 1434 states have return successors, (10230), 4426 states have call predecessors, (10230), 4419 states have call successors, (10230) [2021-11-19 14:31:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25180 states to 25180 states and 44812 transitions. [2021-11-19 14:31:25,689 INFO L78 Accepts]: Start accepts. Automaton has 25180 states and 44812 transitions. Word has length 157 [2021-11-19 14:31:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:25,690 INFO L470 AbstractCegarLoop]: Abstraction has 25180 states and 44812 transitions. [2021-11-19 14:31:25,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 25180 states and 44812 transitions. [2021-11-19 14:31:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 14:31:25,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:25,694 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:25,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:25,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:25,907 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 771642206, now seen corresponding path program 1 times [2021-11-19 14:31:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:25,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30238778] [2021-11-19 14:31:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:25,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:25,910 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:31:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:26,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:31:26,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:31:27,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:27,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30238778] [2021-11-19 14:31:27,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30238778] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:27,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:27,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:31:27,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580034603] [2021-11-19 14:31:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:27,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:27,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:27,125 INFO L87 Difference]: Start difference. First operand 25180 states and 44812 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:29,925 INFO L93 Difference]: Finished difference Result 50582 states and 94648 transitions. [2021-11-19 14:31:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:29,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2021-11-19 14:31:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:30,135 INFO L225 Difference]: With dead ends: 50582 [2021-11-19 14:31:30,135 INFO L226 Difference]: Without dead ends: 25420 [2021-11-19 14:31:31,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:31,103 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 781 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:31,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2159 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:31:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2021-11-19 14:31:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25420. [2021-11-19 14:31:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25420 states, 19468 states have (on average 1.5566570782823095) internal successors, (30305), 20206 states have internal predecessors, (30305), 4469 states have call successors, (4469), 1395 states have call predecessors, (4469), 1482 states have return successors, (10278), 4426 states have call predecessors, (10278), 4419 states have call successors, (10278) [2021-11-19 14:31:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25420 states to 25420 states and 45052 transitions. [2021-11-19 14:31:33,506 INFO L78 Accepts]: Start accepts. Automaton has 25420 states and 45052 transitions. Word has length 159 [2021-11-19 14:31:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:33,510 INFO L470 AbstractCegarLoop]: Abstraction has 25420 states and 45052 transitions. [2021-11-19 14:31:33,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 25420 states and 45052 transitions. [2021-11-19 14:31:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:31:33,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:33,517 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:33,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:33,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:33,738 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:33,739 INFO L85 PathProgramCache]: Analyzing trace with hash 613912636, now seen corresponding path program 1 times [2021-11-19 14:31:33,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:33,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040461761] [2021-11-19 14:31:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:33,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:33,741 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:33,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:31:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:31:34,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:31:34,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:34,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040461761] [2021-11-19 14:31:34,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040461761] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:34,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:34,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:31:34,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980545856] [2021-11-19 14:31:34,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:34,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:34,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:34,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:34,974 INFO L87 Difference]: Start difference. First operand 25420 states and 45052 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:37,948 INFO L93 Difference]: Finished difference Result 51110 states and 95120 transitions. [2021-11-19 14:31:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:37,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-19 14:31:37,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:38,216 INFO L225 Difference]: With dead ends: 51110 [2021-11-19 14:31:38,216 INFO L226 Difference]: Without dead ends: 25708 [2021-11-19 14:31:38,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:38,722 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 775 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:38,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2159 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:31:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25708 states. [2021-11-19 14:31:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25708 to 25708. [2021-11-19 14:31:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25708 states, 19708 states have (on average 1.5498782220418104) internal successors, (30545), 20446 states have internal predecessors, (30545), 4469 states have call successors, (4469), 1443 states have call predecessors, (4469), 1530 states have return successors, (10326), 4426 states have call predecessors, (10326), 4419 states have call successors, (10326) [2021-11-19 14:31:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25708 states to 25708 states and 45340 transitions. [2021-11-19 14:31:40,686 INFO L78 Accepts]: Start accepts. Automaton has 25708 states and 45340 transitions. Word has length 161 [2021-11-19 14:31:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:40,687 INFO L470 AbstractCegarLoop]: Abstraction has 25708 states and 45340 transitions. [2021-11-19 14:31:40,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25708 states and 45340 transitions. [2021-11-19 14:31:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:31:40,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:40,692 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:40,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:40,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:40,914 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash 723493910, now seen corresponding path program 1 times [2021-11-19 14:31:40,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:40,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387523249] [2021-11-19 14:31:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:40,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:40,917 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:40,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:31:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:31:41,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:31:42,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:42,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387523249] [2021-11-19 14:31:42,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387523249] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:42,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:42,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:31:42,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226452245] [2021-11-19 14:31:42,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:42,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:31:42,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:31:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:42,069 INFO L87 Difference]: Start difference. First operand 25708 states and 45340 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:45,187 INFO L93 Difference]: Finished difference Result 51734 states and 95700 transitions. [2021-11-19 14:31:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:31:45,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2021-11-19 14:31:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:45,446 INFO L225 Difference]: With dead ends: 51734 [2021-11-19 14:31:45,447 INFO L226 Difference]: Without dead ends: 26044 [2021-11-19 14:31:45,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:45,970 INFO L933 BasicCegarLoop]: 850 mSDtfsCounter, 784 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:45,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 2159 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:31:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26044 states. [2021-11-19 14:31:47,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26044 to 26044. [2021-11-19 14:31:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26044 states, 19996 states have (on average 1.5419583916783357) internal successors, (30833), 20734 states have internal predecessors, (30833), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (10374), 4426 states have call predecessors, (10374), 4419 states have call successors, (10374) [2021-11-19 14:31:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26044 states to 26044 states and 45676 transitions. [2021-11-19 14:31:47,833 INFO L78 Accepts]: Start accepts. Automaton has 26044 states and 45676 transitions. Word has length 163 [2021-11-19 14:31:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:47,833 INFO L470 AbstractCegarLoop]: Abstraction has 26044 states and 45676 transitions. [2021-11-19 14:31:47,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:31:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 26044 states and 45676 transitions. [2021-11-19 14:31:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:31:47,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:47,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:47,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:48,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:48,038 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:48,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2101601788, now seen corresponding path program 1 times [2021-11-19 14:31:48,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:48,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471108817] [2021-11-19 14:31:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:48,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:48,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:48,042 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:48,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:31:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:31:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:31:49,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 14:31:49,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:49,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471108817] [2021-11-19 14:31:49,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471108817] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:49,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:31:49,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-19 14:31:49,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84279339] [2021-11-19 14:31:49,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:49,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:31:49,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:31:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:31:49,735 INFO L87 Difference]: Start difference. First operand 26044 states and 45676 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 14:31:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:56,230 INFO L93 Difference]: Finished difference Result 58430 states and 109354 transitions. [2021-11-19 14:31:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:31:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-19 14:31:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:56,524 INFO L225 Difference]: With dead ends: 58430 [2021-11-19 14:31:56,524 INFO L226 Difference]: Without dead ends: 32404 [2021-11-19 14:31:56,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:31:56,834 INFO L933 BasicCegarLoop]: 1081 mSDtfsCounter, 1824 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:56,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 3861 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 14:31:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32404 states. [2021-11-19 14:31:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32404 to 26044. [2021-11-19 14:31:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26044 states, 19996 states have (on average 1.5411582316463293) internal successors, (30817), 20734 states have internal predecessors, (30817), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (10374), 4426 states have call predecessors, (10374), 4419 states have call successors, (10374) [2021-11-19 14:31:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26044 states to 26044 states and 45660 transitions. [2021-11-19 14:31:59,142 INFO L78 Accepts]: Start accepts. Automaton has 26044 states and 45660 transitions. Word has length 165 [2021-11-19 14:31:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:59,143 INFO L470 AbstractCegarLoop]: Abstraction has 26044 states and 45660 transitions. [2021-11-19 14:31:59,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 14:31:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 26044 states and 45660 transitions. [2021-11-19 14:31:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:31:59,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:59,148 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:59,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:59,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:59,369 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash 667496676, now seen corresponding path program 1 times [2021-11-19 14:31:59,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:59,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100568729] [2021-11-19 14:31:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:59,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:59,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:59,373 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:59,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:31:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:31:59,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:32:00,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 14:32:00,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:00,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100568729] [2021-11-19 14:32:00,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100568729] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:32:00,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:32:00,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-19 14:32:00,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719934767] [2021-11-19 14:32:00,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:00,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:32:00,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:32:00,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:32:00,842 INFO L87 Difference]: Start difference. First operand 26044 states and 45660 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:32:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:07,521 INFO L93 Difference]: Finished difference Result 88038 states and 170206 transitions. [2021-11-19 14:32:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:32:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 171 [2021-11-19 14:32:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:08,215 INFO L225 Difference]: With dead ends: 88038 [2021-11-19 14:32:08,216 INFO L226 Difference]: Without dead ends: 62012 [2021-11-19 14:32:08,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:32:08,676 INFO L933 BasicCegarLoop]: 1345 mSDtfsCounter, 1000 mSDsluCounter, 6070 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 7415 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:08,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 7415 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:32:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62012 states. [2021-11-19 14:32:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62012 to 59652. [2021-11-19 14:32:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59652 states, 43772 states have (on average 1.5313442383258704) internal successors, (67030), 46110 states have internal predecessors, (67030), 12581 states have call successors, (12581), 2979 states have call predecessors, (12581), 3298 states have return successors, (33259), 12594 states have call predecessors, (33259), 12483 states have call successors, (33259) [2021-11-19 14:32:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59652 states to 59652 states and 112870 transitions. [2021-11-19 14:32:14,771 INFO L78 Accepts]: Start accepts. Automaton has 59652 states and 112870 transitions. Word has length 171 [2021-11-19 14:32:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:14,772 INFO L470 AbstractCegarLoop]: Abstraction has 59652 states and 112870 transitions. [2021-11-19 14:32:14,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:32:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 59652 states and 112870 transitions. [2021-11-19 14:32:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:32:14,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:14,780 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:14,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:14,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:14,995 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1084911812, now seen corresponding path program 1 times [2021-11-19 14:32:14,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:14,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631831220] [2021-11-19 14:32:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:14,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:14,998 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:14,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4b0c17d-931f-422e-8b5a-9c94aba8dd9c/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:32:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:32:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:32:15,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:32:16,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:16,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631831220] [2021-11-19 14:32:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631831220] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:32:16,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:32:16,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 14:32:16,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590546064] [2021-11-19 14:32:16,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:16,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:32:16,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:32:16,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:32:16,260 INFO L87 Difference]: Start difference. First operand 59652 states and 112870 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21)