./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:47,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:47,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:47,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:47,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:47,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:47,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:47,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:47,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:47,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:47,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:47,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:47,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:47,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:47,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:47,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:47,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:47,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:47,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:47,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:47,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:47,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:47,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:47,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:47,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:47,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:47,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:47,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:47,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:47,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:47,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:47,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:47,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:47,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:47,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:47,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:47,522 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:47,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:47,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:47,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:47,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:47,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:23:47,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:47,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:47,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:47,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:47,567 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:47,567 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:47,568 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:47,568 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:23:47,568 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:47,568 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:47,568 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:23:47,569 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:23:47,569 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:47,569 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:23:47,569 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:23:47,569 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:23:47,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:47,570 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:47,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:23:47,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:47,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:47,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:47,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:47,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:47,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:47,572 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:47,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:47,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:47,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:47,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:47,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:47,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:47,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:47,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:47,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:47,573 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:23:47,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:23:47,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:47,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:47,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:47,574 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_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-11-12 23:23:47,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:47,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:47,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:47,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:47,835 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:47,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-12 23:23:47,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/335b5c442/6df99a65c8804e749162571260b34aa4/FLAG4a0b77c5d [2021-11-12 23:23:48,559 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:48,562 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-12 23:23:48,593 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/335b5c442/6df99a65c8804e749162571260b34aa4/FLAG4a0b77c5d [2021-11-12 23:23:48,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/335b5c442/6df99a65c8804e749162571260b34aa4 [2021-11-12 23:23:48,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:48,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:48,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:48,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:48,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:48,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:48" (1/1) ... [2021-11-12 23:23:48,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742c4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:48, skipping insertion in model container [2021-11-12 23:23:48,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:48" (1/1) ... [2021-11-12 23:23:48,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:48,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:49,071 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-12 23:23:49,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:49,391 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:23:49,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6592b79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:49, skipping insertion in model container [2021-11-12 23:23:49,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:49,393 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:23:49,394 INFO L158 Benchmark]: Toolchain (without parser) took 674.73ms. Allocated memory is still 111.1MB. Free memory was 74.0MB in the beginning and 74.4MB in the end (delta: -341.0kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:23:49,395 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory was 53.1MB in the beginning and 53.1MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:49,396 INFO L158 Benchmark]: CACSL2BoogieTranslator took 663.92ms. Allocated memory is still 111.1MB. Free memory was 73.8MB in the beginning and 74.4MB in the end (delta: -530.6kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 23:23:49,398 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory was 53.1MB in the beginning and 53.1MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 663.92ms. Allocated memory is still 111.1MB. Free memory was 73.8MB in the beginning and 74.4MB in the end (delta: -530.6kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:51,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:51,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:51,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:51,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:51,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:51,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:51,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:51,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:51,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:51,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:51,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:51,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:51,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:51,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:51,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:51,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:51,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:51,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:51,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:51,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:51,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:51,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:51,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:51,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:51,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:51,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:51,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:51,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:51,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:51,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:51,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:51,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:51,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:51,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:51,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:51,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:51,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:51,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:51,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:51,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:51,828 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:23:51,882 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:51,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:51,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:51,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:51,885 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:51,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:51,885 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:51,885 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:51,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:51,886 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:51,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:51,889 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:51,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:51,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:51,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:51,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:51,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:51,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:51,890 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:23:51,890 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:23:51,891 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:51,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:51,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:51,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:51,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:51,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:23:51,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:51,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:51,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:51,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:51,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:51,893 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:23:51,893 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:51,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:51,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:51,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:51,895 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_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2021-11-12 23:23:52,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:52,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:52,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:52,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:52,315 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:52,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-12 23:23:52,410 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/26afbcebc/c85522e60d2b41779c7af61f04bf22b9/FLAGb1cf2e110 [2021-11-12 23:23:53,183 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:53,184 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2021-11-12 23:23:53,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/26afbcebc/c85522e60d2b41779c7af61f04bf22b9/FLAGb1cf2e110 [2021-11-12 23:23:53,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/data/26afbcebc/c85522e60d2b41779c7af61f04bf22b9 [2021-11-12 23:23:53,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:53,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:53,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:53,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:53,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:53,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:53" (1/1) ... [2021-11-12 23:23:53,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bcaa91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:53, skipping insertion in model container [2021-11-12 23:23:53,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:53" (1/1) ... [2021-11-12 23:23:53,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:53,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:53,719 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-12 23:23:54,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:54,042 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:23:54,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:54,114 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-12 23:23:54,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:54,314 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:23:54,368 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2021-11-12 23:23:54,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:54,509 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:23:54,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54 WrapperNode [2021-11-12 23:23:54,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:54,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:54,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:23:54,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:23:54,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:54,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:23:54,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:23:54,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:23:54,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:23:54,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:23:54,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:23:54,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:23:54,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (1/1) ... [2021-11-12 23:23:54,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:54,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:54,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:23:54,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:23:54,850 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:23:54,852 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:23:54,853 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:23:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:23:54,853 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:23:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:23:54,853 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:23:54,853 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:23:54,854 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:23:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:23:54,854 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:23:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:23:54,854 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:23:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:23:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:23:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:23:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:23:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:23:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:23:54,856 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:23:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:23:54,856 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:23:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:23:54,856 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:23:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:23:54,857 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:23:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:23:54,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:23:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:23:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:23:54,858 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:23:54,858 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:23:54,858 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:23:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:23:54,859 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:23:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:23:54,859 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:23:54,859 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:23:54,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:23:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:23:54,860 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:23:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:23:54,860 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:23:54,860 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:23:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:23:54,861 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:23:54,861 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:23:54,862 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:23:54,862 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:23:54,863 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:23:54,864 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:23:54,865 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:23:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:23:54,866 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:23:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:23:54,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:23:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:23:54,867 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:23:59,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:23:59,215 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:23:59,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:59 BoogieIcfgContainer [2021-11-12 23:23:59,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:23:59,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:23:59,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:23:59,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:23:59,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:23:53" (1/3) ... [2021-11-12 23:23:59,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2519a2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:59, skipping insertion in model container [2021-11-12 23:23:59,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:54" (2/3) ... [2021-11-12 23:23:59,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2519a2d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:59, skipping insertion in model container [2021-11-12 23:23:59,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:59" (3/3) ... [2021-11-12 23:23:59,228 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2021-11-12 23:23:59,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:23:59,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:23:59,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:23:59,309 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:23:59,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:23:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 603 states, 469 states have (on average 1.67590618336887) internal successors, (786), 490 states have internal predecessors, (786), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:23:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:23:59,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:59,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:59,386 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:59,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1605803349, now seen corresponding path program 1 times [2021-11-12 23:23:59,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:59,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833587470] [2021-11-12 23:23:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:59,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:59,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:59,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:24:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:24:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:24:00,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-12 23:24:00,859 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:00,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833587470] [2021-11-12 23:24:00,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833587470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:00,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:00,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:24:00,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976441593] [2021-11-12 23:24:00,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:00,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:24:00,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:00,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:24:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:00,910 INFO L87 Difference]: Start difference. First operand has 603 states, 469 states have (on average 1.67590618336887) internal successors, (786), 490 states have internal predecessors, (786), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-12 23:24:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:01,001 INFO L93 Difference]: Finished difference Result 624 states and 1026 transitions. [2021-11-12 23:24:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:24:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 127 [2021-11-12 23:24:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:01,033 INFO L225 Difference]: With dead ends: 624 [2021-11-12 23:24:01,033 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 23:24:01,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:01,042 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:01,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 11.25ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:24:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 23:24:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 23:24:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 463 states have (on average 1.673866090712743) internal successors, (775), 482 states have internal predecessors, (775), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 980 transitions. [2021-11-12 23:24:01,198 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 980 transitions. Word has length 127 [2021-11-12 23:24:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:01,201 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 980 transitions. [2021-11-12 23:24:01,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 35.0) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-12 23:24:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 980 transitions. [2021-11-12 23:24:01,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:24:01,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:01,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:01,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:01,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:01,435 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash 564114879, now seen corresponding path program 1 times [2021-11-12 23:24:01,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:01,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684650490] [2021-11-12 23:24:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:01,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:01,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:01,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:24:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:02,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:24:02,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:24:02,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:02,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684650490] [2021-11-12 23:24:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684650490] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:02,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:02,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:02,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349262548] [2021-11-12 23:24:02,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:02,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:02,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:02,817 INFO L87 Difference]: Start difference. First operand 595 states and 980 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:02,992 INFO L93 Difference]: Finished difference Result 1181 states and 1952 transitions. [2021-11-12 23:24:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:02,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2021-11-12 23:24:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:03,004 INFO L225 Difference]: With dead ends: 1181 [2021-11-12 23:24:03,004 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 23:24:03,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:03,015 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 14 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:03,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2891 Invalid, 35 Unknown, 0 Unchecked, 23.90ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 48.30ms Time] [2021-11-12 23:24:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 23:24:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 23:24:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 463 states have (on average 1.6717062634989202) internal successors, (774), 482 states have internal predecessors, (774), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 979 transitions. [2021-11-12 23:24:03,075 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 979 transitions. Word has length 129 [2021-11-12 23:24:03,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:03,076 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 979 transitions. [2021-11-12 23:24:03,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 979 transitions. [2021-11-12 23:24:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:24:03,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:03,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:03,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:03,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:03,316 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:03,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1401786623, now seen corresponding path program 1 times [2021-11-12 23:24:03,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:03,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324568111] [2021-11-12 23:24:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:03,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:03,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:03,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:03,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:24:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:24:04,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:24:04,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:04,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324568111] [2021-11-12 23:24:04,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324568111] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:04,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:04,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:04,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919701833] [2021-11-12 23:24:04,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:04,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:04,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:04,684 INFO L87 Difference]: Start difference. First operand 595 states and 979 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:04,791 INFO L93 Difference]: Finished difference Result 1181 states and 1950 transitions. [2021-11-12 23:24:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:04,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 131 [2021-11-12 23:24:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:04,799 INFO L225 Difference]: With dead ends: 1181 [2021-11-12 23:24:04,799 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 23:24:04,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:04,805 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 12 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.16ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:04,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2891 Invalid, 33 Unknown, 0 Unchecked, 10.16ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 40.69ms Time] [2021-11-12 23:24:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 23:24:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2021-11-12 23:24:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 463 states have (on average 1.6695464362850971) internal successors, (773), 482 states have internal predecessors, (773), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 978 transitions. [2021-11-12 23:24:04,845 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 978 transitions. Word has length 131 [2021-11-12 23:24:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:04,846 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 978 transitions. [2021-11-12 23:24:04,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 978 transitions. [2021-11-12 23:24:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:24:04,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:04,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:04,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:05,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:05,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -648589249, now seen corresponding path program 1 times [2021-11-12 23:24:05,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:05,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656438682] [2021-11-12 23:24:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:05,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:05,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:05,075 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:05,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:24:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:24:06,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:24:06,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:06,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656438682] [2021-11-12 23:24:06,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656438682] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:06,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:06,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:06,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206993400] [2021-11-12 23:24:06,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:06,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:06,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:06,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:06,417 INFO L87 Difference]: Start difference. First operand 595 states and 978 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,509 INFO L93 Difference]: Finished difference Result 1185 states and 1953 transitions. [2021-11-12 23:24:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2021-11-12 23:24:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,515 INFO L225 Difference]: With dead ends: 1185 [2021-11-12 23:24:06,516 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 23:24:06,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:06,520 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 13 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2891 Invalid, 35 Unknown, 0 Unchecked, 6.72ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 40.20ms Time] [2021-11-12 23:24:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 23:24:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 23:24:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 468 states have (on average 1.6623931623931625) internal successors, (778), 487 states have internal predecessors, (778), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 983 transitions. [2021-11-12 23:24:06,552 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 983 transitions. Word has length 133 [2021-11-12 23:24:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,553 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 983 transitions. [2021-11-12 23:24:06,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 983 transitions. [2021-11-12 23:24:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:24:06,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:06,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:06,774 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,775 INFO L85 PathProgramCache]: Analyzing trace with hash -7038281, now seen corresponding path program 1 times [2021-11-12 23:24:06,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:06,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740230515] [2021-11-12 23:24:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:06,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:06,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:06,778 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:06,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:24:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:24:07,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:24:08,136 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:08,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740230515] [2021-11-12 23:24:08,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740230515] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:08,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:08,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:08,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568064944] [2021-11-12 23:24:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:08,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:08,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:08,138 INFO L87 Difference]: Start difference. First operand 601 states and 983 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:08,218 INFO L93 Difference]: Finished difference Result 1184 states and 1944 transitions. [2021-11-12 23:24:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:08,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2021-11-12 23:24:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:08,224 INFO L225 Difference]: With dead ends: 1184 [2021-11-12 23:24:08,225 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 23:24:08,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:08,229 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 8 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:08,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2892 Invalid, 30 Unknown, 0 Unchecked, 6.29ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 33.35ms Time] [2021-11-12 23:24:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 23:24:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 23:24:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 468 states have (on average 1.6602564102564104) internal successors, (777), 487 states have internal predecessors, (777), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 982 transitions. [2021-11-12 23:24:08,255 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 982 transitions. Word has length 134 [2021-11-12 23:24:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:08,255 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 982 transitions. [2021-11-12 23:24:08,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 982 transitions. [2021-11-12 23:24:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:24:08,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:08,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:08,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:08,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:08,482 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:08,483 INFO L85 PathProgramCache]: Analyzing trace with hash 136827971, now seen corresponding path program 1 times [2021-11-12 23:24:08,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:08,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859625338] [2021-11-12 23:24:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:08,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:08,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:08,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:08,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:24:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:09,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:24:09,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:24:09,688 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:09,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859625338] [2021-11-12 23:24:09,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859625338] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:09,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:09,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:09,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506805792] [2021-11-12 23:24:09,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:09,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:09,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:09,691 INFO L87 Difference]: Start difference. First operand 601 states and 982 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:09,773 INFO L93 Difference]: Finished difference Result 1184 states and 1943 transitions. [2021-11-12 23:24:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2021-11-12 23:24:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:09,787 INFO L225 Difference]: With dead ends: 1184 [2021-11-12 23:24:09,787 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 23:24:09,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:09,794 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 6 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:09,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2892 Invalid, 28 Unknown, 0 Unchecked, 6.91ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 30.56ms Time] [2021-11-12 23:24:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 23:24:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 23:24:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 468 states have (on average 1.6581196581196582) internal successors, (776), 487 states have internal predecessors, (776), 105 states have call successors, (105), 28 states have call predecessors, (105), 27 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 981 transitions. [2021-11-12 23:24:09,822 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 981 transitions. Word has length 135 [2021-11-12 23:24:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:09,823 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 981 transitions. [2021-11-12 23:24:09,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 981 transitions. [2021-11-12 23:24:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:24:09,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:09,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:09,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 23:24:10,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:10,050 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2032337211, now seen corresponding path program 1 times [2021-11-12 23:24:10,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:10,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290875315] [2021-11-12 23:24:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:10,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:10,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:10,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:10,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:24:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:10,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:10,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:11,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:11,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290875315] [2021-11-12 23:24:11,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290875315] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:11,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:11,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:24:11,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749888544] [2021-11-12 23:24:11,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:11,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:11,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:11,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:11,260 INFO L87 Difference]: Start difference. First operand 601 states and 981 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:11,502 INFO L93 Difference]: Finished difference Result 1201 states and 1971 transitions. [2021-11-12 23:24:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 136 [2021-11-12 23:24:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:11,510 INFO L225 Difference]: With dead ends: 1201 [2021-11-12 23:24:11,510 INFO L226 Difference]: Without dead ends: 622 [2021-11-12 23:24:11,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:11,514 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 148 mSDsluCounter, 4718 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5683 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:11,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5683 Invalid, 85 Unknown, 0 Unchecked, 17.60ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 155.03ms Time] [2021-11-12 23:24:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-12 23:24:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 620. [2021-11-12 23:24:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 484 states have (on average 1.6570247933884297) internal successors, (802), 505 states have internal predecessors, (802), 106 states have call successors, (106), 28 states have call predecessors, (106), 29 states have return successors, (104), 99 states have call predecessors, (104), 101 states have call successors, (104) [2021-11-12 23:24:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1012 transitions. [2021-11-12 23:24:11,547 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1012 transitions. Word has length 136 [2021-11-12 23:24:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:11,547 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1012 transitions. [2021-11-12 23:24:11,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1012 transitions. [2021-11-12 23:24:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:24:11,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:11,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:11,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:11,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:11,776 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1391251068, now seen corresponding path program 1 times [2021-11-12 23:24:11,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:11,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725803586] [2021-11-12 23:24:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:11,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:11,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:11,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:11,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:24:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:12,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:24:12,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:24:13,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:13,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725803586] [2021-11-12 23:24:13,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725803586] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:13,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:13,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:24:13,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792735466] [2021-11-12 23:24:13,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:13,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:13,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:13,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:24:13,004 INFO L87 Difference]: Start difference. First operand 620 states and 1012 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:13,090 INFO L93 Difference]: Finished difference Result 1214 states and 1993 transitions. [2021-11-12 23:24:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2021-11-12 23:24:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:13,096 INFO L225 Difference]: With dead ends: 1214 [2021-11-12 23:24:13,096 INFO L226 Difference]: Without dead ends: 616 [2021-11-12 23:24:13,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:13,100 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 8 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:13,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2891 Invalid, 30 Unknown, 0 Unchecked, 6.12ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 45.01ms Time] [2021-11-12 23:24:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-12 23:24:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-11-12 23:24:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 482 states have (on average 1.657676348547718) internal successors, (799), 502 states have internal predecessors, (799), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:24:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1005 transitions. [2021-11-12 23:24:13,125 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1005 transitions. Word has length 136 [2021-11-12 23:24:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:13,125 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1005 transitions. [2021-11-12 23:24:13,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1005 transitions. [2021-11-12 23:24:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:24:13,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:13,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:13,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:13,351 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1864597514, now seen corresponding path program 1 times [2021-11-12 23:24:13,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:13,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336738707] [2021-11-12 23:24:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:13,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:13,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:13,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:24:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:13,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:24:14,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:14,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336738707] [2021-11-12 23:24:14,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336738707] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:14,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:14,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:14,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393333314] [2021-11-12 23:24:14,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:14,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:14,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:14,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:14,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:14,404 INFO L87 Difference]: Start difference. First operand 616 states and 1005 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:14,600 INFO L93 Difference]: Finished difference Result 1240 states and 2038 transitions. [2021-11-12 23:24:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-11-12 23:24:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:14,608 INFO L225 Difference]: With dead ends: 1240 [2021-11-12 23:24:14,608 INFO L226 Difference]: Without dead ends: 616 [2021-11-12 23:24:14,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:14,613 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 134 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.26ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.09ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:14,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2699 Invalid, 131 Unknown, 0 Unchecked, 5.26ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 156.09ms Time] [2021-11-12 23:24:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-12 23:24:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-11-12 23:24:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 482 states have (on average 1.6473029045643153) internal successors, (794), 502 states have internal predecessors, (794), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:24:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1000 transitions. [2021-11-12 23:24:14,644 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1000 transitions. Word has length 137 [2021-11-12 23:24:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:14,645 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1000 transitions. [2021-11-12 23:24:14,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1000 transitions. [2021-11-12 23:24:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:24:14,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:14,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:14,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:14,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:14,870 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:14,871 INFO L85 PathProgramCache]: Analyzing trace with hash -977333600, now seen corresponding path program 1 times [2021-11-12 23:24:14,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:14,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268360437] [2021-11-12 23:24:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:14,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:14,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:14,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:24:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:15,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:15,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:24:16,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:16,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268360437] [2021-11-12 23:24:16,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268360437] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:16,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:16,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:16,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900498395] [2021-11-12 23:24:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:16,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:16,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:16,018 INFO L87 Difference]: Start difference. First operand 616 states and 1000 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:16,220 INFO L93 Difference]: Finished difference Result 1240 states and 2028 transitions. [2021-11-12 23:24:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 139 [2021-11-12 23:24:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:16,227 INFO L225 Difference]: With dead ends: 1240 [2021-11-12 23:24:16,228 INFO L226 Difference]: Without dead ends: 616 [2021-11-12 23:24:16,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:16,235 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 128 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2699 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.22ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:16,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2699 Invalid, 121 Unknown, 0 Unchecked, 5.22ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 157.20ms Time] [2021-11-12 23:24:16,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-12 23:24:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-11-12 23:24:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 482 states have (on average 1.6369294605809128) internal successors, (789), 502 states have internal predecessors, (789), 105 states have call successors, (105), 28 states have call predecessors, (105), 28 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:24:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 995 transitions. [2021-11-12 23:24:16,261 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 995 transitions. Word has length 139 [2021-11-12 23:24:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:16,262 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 995 transitions. [2021-11-12 23:24:16,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:16,262 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 995 transitions. [2021-11-12 23:24:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:24:16,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:16,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:16,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:16,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:16,482 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2069824022, now seen corresponding path program 1 times [2021-11-12 23:24:16,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:16,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884117073] [2021-11-12 23:24:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:16,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:16,484 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:16,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:24:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:17,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:24:17,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:17,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884117073] [2021-11-12 23:24:17,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884117073] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:17,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:17,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:17,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207558981] [2021-11-12 23:24:17,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:17,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:17,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:17,733 INFO L87 Difference]: Start difference. First operand 616 states and 995 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:17,912 INFO L93 Difference]: Finished difference Result 1261 states and 2049 transitions. [2021-11-12 23:24:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:17,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 141 [2021-11-12 23:24:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:17,920 INFO L225 Difference]: With dead ends: 1261 [2021-11-12 23:24:17,920 INFO L226 Difference]: Without dead ends: 646 [2021-11-12 23:24:17,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:17,925 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 143 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:17,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2709 Invalid, 131 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 142.63ms Time] [2021-11-12 23:24:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-12 23:24:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 631. [2021-11-12 23:24:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 497 states have (on average 1.6177062374245472) internal successors, (804), 516 states have internal predecessors, (804), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1009 transitions. [2021-11-12 23:24:17,949 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1009 transitions. Word has length 141 [2021-11-12 23:24:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:17,950 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1009 transitions. [2021-11-12 23:24:17,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1009 transitions. [2021-11-12 23:24:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:24:17,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:17,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:17,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:18,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:18,178 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1771073174, now seen corresponding path program 1 times [2021-11-12 23:24:18,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:18,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192145544] [2021-11-12 23:24:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:18,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:18,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:18,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:24:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:18,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:18,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:19,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:19,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:19,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192145544] [2021-11-12 23:24:19,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192145544] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:19,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:19,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:24:19,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732059237] [2021-11-12 23:24:19,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:19,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:19,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:19,467 INFO L87 Difference]: Start difference. First operand 631 states and 1009 transitions. Second operand has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:19,638 INFO L93 Difference]: Finished difference Result 1225 states and 1970 transitions. [2021-11-12 23:24:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:19,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 141 [2021-11-12 23:24:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:19,645 INFO L225 Difference]: With dead ends: 1225 [2021-11-12 23:24:19,646 INFO L226 Difference]: Without dead ends: 625 [2021-11-12 23:24:19,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:19,650 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 131 mSDsluCounter, 4683 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5651 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.53ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:19,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5651 Invalid, 75 Unknown, 0 Unchecked, 7.53ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 125.55ms Time] [2021-11-12 23:24:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-12 23:24:19,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 610. [2021-11-12 23:24:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 476 states have (on average 1.611344537815126) internal successors, (767), 495 states have internal predecessors, (767), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 972 transitions. [2021-11-12 23:24:19,679 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 972 transitions. Word has length 141 [2021-11-12 23:24:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:19,680 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 972 transitions. [2021-11-12 23:24:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 972 transitions. [2021-11-12 23:24:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:24:19,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:19,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:19,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:19,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:19,898 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1785264488, now seen corresponding path program 1 times [2021-11-12 23:24:19,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:19,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362286552] [2021-11-12 23:24:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:19,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:19,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:19,902 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:19,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:24:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:20,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:20,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:24:21,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:21,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362286552] [2021-11-12 23:24:21,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362286552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:21,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:21,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:21,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537361490] [2021-11-12 23:24:21,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:21,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:21,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:21,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:21,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:21,086 INFO L87 Difference]: Start difference. First operand 610 states and 972 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:21,214 INFO L93 Difference]: Finished difference Result 1189 states and 1908 transitions. [2021-11-12 23:24:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 142 [2021-11-12 23:24:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:21,221 INFO L225 Difference]: With dead ends: 1189 [2021-11-12 23:24:21,222 INFO L226 Difference]: Without dead ends: 610 [2021-11-12 23:24:21,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:21,226 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 69 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:21,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2723 Invalid, 54 Unknown, 0 Unchecked, 3.67ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 98.29ms Time] [2021-11-12 23:24:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-12 23:24:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-12 23:24:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 476 states have (on average 1.6092436974789917) internal successors, (766), 495 states have internal predecessors, (766), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 971 transitions. [2021-11-12 23:24:21,249 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 971 transitions. Word has length 142 [2021-11-12 23:24:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:21,250 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 971 transitions. [2021-11-12 23:24:21,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 971 transitions. [2021-11-12 23:24:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:24:21,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:21,256 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:21,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 23:24:21,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:21,470 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1303378501, now seen corresponding path program 1 times [2021-11-12 23:24:21,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:21,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647554012] [2021-11-12 23:24:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:21,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:21,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:21,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:21,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:24:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:22,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:24:22,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:22,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647554012] [2021-11-12 23:24:22,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647554012] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:22,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:22,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:24:22,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361799810] [2021-11-12 23:24:22,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:22,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:24:22,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:24:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:22,597 INFO L87 Difference]: Start difference. First operand 610 states and 971 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:22,690 INFO L93 Difference]: Finished difference Result 1189 states and 1907 transitions. [2021-11-12 23:24:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:24:22,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2021-11-12 23:24:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:22,696 INFO L225 Difference]: With dead ends: 1189 [2021-11-12 23:24:22,697 INFO L226 Difference]: Without dead ends: 610 [2021-11-12 23:24:22,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:22,701 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 67 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.06ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:22,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2723 Invalid, 52 Unknown, 0 Unchecked, 3.69ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 65.06ms Time] [2021-11-12 23:24:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-12 23:24:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-12 23:24:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 476 states have (on average 1.6071428571428572) internal successors, (765), 495 states have internal predecessors, (765), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 970 transitions. [2021-11-12 23:24:22,723 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 970 transitions. Word has length 143 [2021-11-12 23:24:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:22,724 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 970 transitions. [2021-11-12 23:24:22,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:24:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 970 transitions. [2021-11-12 23:24:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:24:22,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:22,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:22,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:22,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:22,946 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1124295379, now seen corresponding path program 1 times [2021-11-12 23:24:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:22,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585865469] [2021-11-12 23:24:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:22,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:22,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:22,949 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:22,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:24:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:23,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:24:23,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:23,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:24,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:24,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585865469] [2021-11-12 23:24:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585865469] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:24,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:24,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:24:24,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336909482] [2021-11-12 23:24:24,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:24,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:24,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:24,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:24,436 INFO L87 Difference]: Start difference. First operand 610 states and 970 transitions. Second operand has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:24,641 INFO L93 Difference]: Finished difference Result 1194 states and 1914 transitions. [2021-11-12 23:24:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:24,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 144 [2021-11-12 23:24:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:24,649 INFO L225 Difference]: With dead ends: 1194 [2021-11-12 23:24:24,649 INFO L226 Difference]: Without dead ends: 621 [2021-11-12 23:24:24,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:24:24,654 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 109 mSDsluCounter, 5408 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6320 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.89ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:24,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6320 Invalid, 152 Unknown, 0 Unchecked, 6.89ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 142.37ms Time] [2021-11-12 23:24:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-11-12 23:24:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 612. [2021-11-12 23:24:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 478 states have (on average 1.602510460251046) internal successors, (766), 497 states have internal predecessors, (766), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 971 transitions. [2021-11-12 23:24:24,680 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 971 transitions. Word has length 144 [2021-11-12 23:24:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:24,681 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 971 transitions. [2021-11-12 23:24:24,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 971 transitions. [2021-11-12 23:24:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 23:24:24,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:24,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:24,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:24:24,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:24,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1715616816, now seen corresponding path program 1 times [2021-11-12 23:24:24,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:24,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292880615] [2021-11-12 23:24:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:24,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:24,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:24,910 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:24,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:24:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:25,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:24:25,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:26,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:26,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292880615] [2021-11-12 23:24:26,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292880615] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:26,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:26,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:24:26,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856366577] [2021-11-12 23:24:26,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:26,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:26,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:26,432 INFO L87 Difference]: Start difference. First operand 612 states and 971 transitions. Second operand has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:26,699 INFO L93 Difference]: Finished difference Result 1186 states and 1895 transitions. [2021-11-12 23:24:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:26,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 145 [2021-11-12 23:24:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:26,706 INFO L225 Difference]: With dead ends: 1186 [2021-11-12 23:24:26,706 INFO L226 Difference]: Without dead ends: 617 [2021-11-12 23:24:26,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:24:26,710 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 77 mSDsluCounter, 5414 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6328 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:26,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6328 Invalid, 152 Unknown, 0 Unchecked, 7.83ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 190.54ms Time] [2021-11-12 23:24:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-12 23:24:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 614. [2021-11-12 23:24:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 480 states have (on average 1.5979166666666667) internal successors, (767), 499 states have internal predecessors, (767), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 972 transitions. [2021-11-12 23:24:26,735 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 972 transitions. Word has length 145 [2021-11-12 23:24:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:26,736 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 972 transitions. [2021-11-12 23:24:26,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:24:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 972 transitions. [2021-11-12 23:24:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:24:26,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:26,741 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:26,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:26,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:26,963 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:26,963 INFO L85 PathProgramCache]: Analyzing trace with hash 423503677, now seen corresponding path program 1 times [2021-11-12 23:24:26,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:26,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597676530] [2021-11-12 23:24:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:26,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:26,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:26,965 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:27,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:24:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:27,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:27,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:28,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:28,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597676530] [2021-11-12 23:24:28,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597676530] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:28,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:28,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:24:28,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451912502] [2021-11-12 23:24:28,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:28,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:24:28,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:28,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:24:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:28,189 INFO L87 Difference]: Start difference. First operand 614 states and 972 transitions. Second operand has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:28,371 INFO L93 Difference]: Finished difference Result 1132 states and 1822 transitions. [2021-11-12 23:24:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:24:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 146 [2021-11-12 23:24:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:28,378 INFO L225 Difference]: With dead ends: 1132 [2021-11-12 23:24:28,378 INFO L226 Difference]: Without dead ends: 607 [2021-11-12 23:24:28,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:28,382 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 110 mSDsluCounter, 5536 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 6462 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:28,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 6462 Invalid, 108 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 136.29ms Time] [2021-11-12 23:24:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-12 23:24:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 607. [2021-11-12 23:24:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 473 states have (on average 1.6046511627906976) internal successors, (759), 492 states have internal predecessors, (759), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 964 transitions. [2021-11-12 23:24:28,406 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 964 transitions. Word has length 146 [2021-11-12 23:24:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:28,407 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 964 transitions. [2021-11-12 23:24:28,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 964 transitions. [2021-11-12 23:24:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:24:28,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:28,412 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:28,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:28,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:28,626 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1600273722, now seen corresponding path program 1 times [2021-11-12 23:24:28,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:28,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605669085] [2021-11-12 23:24:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:28,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:28,629 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:28,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:24:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:29,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:29,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:29,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605669085] [2021-11-12 23:24:29,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605669085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:29,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:29,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:24:29,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298986653] [2021-11-12 23:24:29,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:29,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:24:29,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:24:29,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:29,851 INFO L87 Difference]: Start difference. First operand 607 states and 964 transitions. Second operand has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:29,986 INFO L93 Difference]: Finished difference Result 1137 states and 1836 transitions. [2021-11-12 23:24:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:29,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 147 [2021-11-12 23:24:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:29,993 INFO L225 Difference]: With dead ends: 1137 [2021-11-12 23:24:29,993 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 23:24:29,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:24:29,997 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 148 mSDsluCounter, 5448 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 6366 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:29,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 6366 Invalid, 86 Unknown, 0 Unchecked, 6.76ms Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 91.59ms Time] [2021-11-12 23:24:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 23:24:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-12 23:24:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 470 states have (on average 1.6042553191489362) internal successors, (754), 489 states have internal predecessors, (754), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:30,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 959 transitions. [2021-11-12 23:24:30,021 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 959 transitions. Word has length 147 [2021-11-12 23:24:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:30,022 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 959 transitions. [2021-11-12 23:24:30,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 959 transitions. [2021-11-12 23:24:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:24:30,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:30,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:30,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:30,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:30,242 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1434206022, now seen corresponding path program 1 times [2021-11-12 23:24:30,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:30,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924907816] [2021-11-12 23:24:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:30,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:30,244 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:30,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:24:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:30,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:31,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:31,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:31,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924907816] [2021-11-12 23:24:31,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924907816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:31,382 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:31,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:24:31,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520064713] [2021-11-12 23:24:31,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:31,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:31,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:31,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:31,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:31,385 INFO L87 Difference]: Start difference. First operand 604 states and 959 transitions. Second operand has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:24:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:31,581 INFO L93 Difference]: Finished difference Result 1134 states and 1831 transitions. [2021-11-12 23:24:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 147 [2021-11-12 23:24:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:31,588 INFO L225 Difference]: With dead ends: 1134 [2021-11-12 23:24:31,588 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:24:31,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:31,592 INFO L933 BasicCegarLoop]: 917 mSDtfsCounter, 142 mSDsluCounter, 4522 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5439 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.29ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:31,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5439 Invalid, 68 Unknown, 0 Unchecked, 7.29ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 148.63ms Time] [2021-11-12 23:24:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:24:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 23:24:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 462 states have (on average 1.6082251082251082) internal successors, (743), 481 states have internal predecessors, (743), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 948 transitions. [2021-11-12 23:24:31,622 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 948 transitions. Word has length 147 [2021-11-12 23:24:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:31,622 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 948 transitions. [2021-11-12 23:24:31,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:24:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 948 transitions. [2021-11-12 23:24:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:24:31,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:31,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:31,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:31,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:31,848 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash -901165951, now seen corresponding path program 1 times [2021-11-12 23:24:31,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:31,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293856264] [2021-11-12 23:24:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:31,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:31,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:31,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:31,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:24:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:24:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:32,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:33,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:33,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293856264] [2021-11-12 23:24:33,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293856264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:33,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:33,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:24:33,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495761533] [2021-11-12 23:24:33,165 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:33,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:24:33,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:33,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:24:33,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:33,167 INFO L87 Difference]: Start difference. First operand 596 states and 948 transitions. Second operand has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:33,375 INFO L93 Difference]: Finished difference Result 1120 states and 1809 transitions. [2021-11-12 23:24:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 148 [2021-11-12 23:24:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:33,382 INFO L225 Difference]: With dead ends: 1120 [2021-11-12 23:24:33,382 INFO L226 Difference]: Without dead ends: 596 [2021-11-12 23:24:33,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:24:33,386 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 91 mSDsluCounter, 7203 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 8116 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:33,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 8116 Invalid, 138 Unknown, 0 Unchecked, 8.95ms Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 144.35ms Time] [2021-11-12 23:24:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-12 23:24:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-11-12 23:24:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 462 states have (on average 1.606060606060606) internal successors, (742), 481 states have internal predecessors, (742), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 947 transitions. [2021-11-12 23:24:33,440 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 947 transitions. Word has length 148 [2021-11-12 23:24:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:33,440 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 947 transitions. [2021-11-12 23:24:33,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 947 transitions. [2021-11-12 23:24:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:24:33,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:33,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:33,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:33,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:33,655 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:33,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash -983629404, now seen corresponding path program 1 times [2021-11-12 23:24:33,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:33,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112844441] [2021-11-12 23:24:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:33,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:33,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:33,657 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:33,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:24:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:34,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:24:34,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:34,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:34,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:34,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112844441] [2021-11-12 23:24:34,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112844441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:34,929 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:34,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:24:34,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645432757] [2021-11-12 23:24:34,929 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:34,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:24:34,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:34,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:24:34,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:34,931 INFO L87 Difference]: Start difference. First operand 596 states and 947 transitions. Second operand has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:35,133 INFO L93 Difference]: Finished difference Result 1164 states and 1866 transitions. [2021-11-12 23:24:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:35,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 149 [2021-11-12 23:24:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:35,139 INFO L225 Difference]: With dead ends: 1164 [2021-11-12 23:24:35,139 INFO L226 Difference]: Without dead ends: 593 [2021-11-12 23:24:35,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:24:35,143 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 149 mSDsluCounter, 5352 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 6253 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:35,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 6253 Invalid, 108 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 134.32ms Time] [2021-11-12 23:24:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-12 23:24:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-11-12 23:24:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 459 states have (on average 1.5991285403050108) internal successors, (734), 478 states have internal predecessors, (734), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 939 transitions. [2021-11-12 23:24:35,165 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 939 transitions. Word has length 149 [2021-11-12 23:24:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:35,166 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 939 transitions. [2021-11-12 23:24:35,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 939 transitions. [2021-11-12 23:24:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:24:35,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:35,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:35,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:35,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:35,390 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:35,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:35,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1436763942, now seen corresponding path program 1 times [2021-11-12 23:24:35,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:35,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624582578] [2021-11-12 23:24:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:35,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:35,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:35,392 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:35,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:24:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:35,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:36,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:36,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:36,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624582578] [2021-11-12 23:24:36,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624582578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:36,597 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:36,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:24:36,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573083593] [2021-11-12 23:24:36,597 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:36,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:24:36,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:36,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:24:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:36,599 INFO L87 Difference]: Start difference. First operand 593 states and 939 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:36,764 INFO L93 Difference]: Finished difference Result 1111 states and 1789 transitions. [2021-11-12 23:24:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 150 [2021-11-12 23:24:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:36,771 INFO L225 Difference]: With dead ends: 1111 [2021-11-12 23:24:36,772 INFO L226 Difference]: Without dead ends: 593 [2021-11-12 23:24:36,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:24:36,775 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 99 mSDsluCounter, 5383 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6285 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.64ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:36,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6285 Invalid, 120 Unknown, 0 Unchecked, 6.64ms Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 109.64ms Time] [2021-11-12 23:24:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-12 23:24:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-11-12 23:24:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 478 states have internal predecessors, (733), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 938 transitions. [2021-11-12 23:24:36,797 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 938 transitions. Word has length 150 [2021-11-12 23:24:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:36,797 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 938 transitions. [2021-11-12 23:24:36,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 938 transitions. [2021-11-12 23:24:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:24:36,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:36,801 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:36,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:37,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:37,021 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1994389397, now seen corresponding path program 1 times [2021-11-12 23:24:37,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:37,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392768527] [2021-11-12 23:24:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:37,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:37,023 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:37,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:24:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:24:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:37,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:24:38,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:38,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392768527] [2021-11-12 23:24:38,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392768527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:38,383 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:38,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:24:38,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172505398] [2021-11-12 23:24:38,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:38,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:24:38,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:24:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:38,385 INFO L87 Difference]: Start difference. First operand 593 states and 938 transitions. Second operand has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:38,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:38,599 INFO L93 Difference]: Finished difference Result 1149 states and 1834 transitions. [2021-11-12 23:24:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:24:38,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 151 [2021-11-12 23:24:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:38,605 INFO L225 Difference]: With dead ends: 1149 [2021-11-12 23:24:38,606 INFO L226 Difference]: Without dead ends: 590 [2021-11-12 23:24:38,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:24:38,609 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 77 mSDsluCounter, 8016 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 8916 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.91ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:38,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 8916 Invalid, 145 Unknown, 0 Unchecked, 7.91ms Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 147.53ms Time] [2021-11-12 23:24:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-12 23:24:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2021-11-12 23:24:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 456 states have (on average 1.5899122807017543) internal successors, (725), 475 states have internal predecessors, (725), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-12 23:24:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 930 transitions. [2021-11-12 23:24:38,632 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 930 transitions. Word has length 151 [2021-11-12 23:24:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:38,632 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 930 transitions. [2021-11-12 23:24:38,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 23:24:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 930 transitions. [2021-11-12 23:24:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:24:38,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:38,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:38,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:38,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:38,854 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:38,855 INFO L85 PathProgramCache]: Analyzing trace with hash 349665419, now seen corresponding path program 1 times [2021-11-12 23:24:38,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:38,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378903826] [2021-11-12 23:24:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:38,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:38,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:38,857 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:38,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:24:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:39,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:24:39,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:24:40,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:40,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378903826] [2021-11-12 23:24:40,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378903826] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:40,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:40,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:24:40,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337009081] [2021-11-12 23:24:40,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:40,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:40,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:40,301 INFO L87 Difference]: Start difference. First operand 590 states and 930 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:24:42,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:44,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:45,217 INFO L93 Difference]: Finished difference Result 1104 states and 1801 transitions. [2021-11-12 23:24:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 152 [2021-11-12 23:24:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:45,222 INFO L225 Difference]: With dead ends: 1104 [2021-11-12 23:24:45,222 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 23:24:45,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:45,226 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 834 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4732.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.30ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4857.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:45,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 2280 Invalid, 473 Unknown, 0 Unchecked, 13.30ms Time], IncrementalHoareTripleChecker [16 Valid, 455 Invalid, 2 Unknown, 0 Unchecked, 4857.07ms Time] [2021-11-12 23:24:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 23:24:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2021-11-12 23:24:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 459 states have (on average 1.5860566448801743) internal successors, (728), 478 states have internal predecessors, (728), 105 states have call successors, (105), 30 states have call predecessors, (105), 29 states have return successors, (101), 98 states have call predecessors, (101), 100 states have call successors, (101) [2021-11-12 23:24:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 934 transitions. [2021-11-12 23:24:45,251 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 934 transitions. Word has length 152 [2021-11-12 23:24:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:45,252 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 934 transitions. [2021-11-12 23:24:45,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:24:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 934 transitions. [2021-11-12 23:24:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:24:45,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:45,256 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:45,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 23:24:45,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:45,470 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash 65273459, now seen corresponding path program 1 times [2021-11-12 23:24:45,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:45,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040460680] [2021-11-12 23:24:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:45,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:45,473 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:45,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:24:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:24:46,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:24:46,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:46,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040460680] [2021-11-12 23:24:46,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040460680] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:46,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:46,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:24:46,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851592330] [2021-11-12 23:24:46,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:46,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:46,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:46,801 INFO L87 Difference]: Start difference. First operand 594 states and 934 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:24:48,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:50,839 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:51,880 INFO L93 Difference]: Finished difference Result 1113 states and 1808 transitions. [2021-11-12 23:24:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:51,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 154 [2021-11-12 23:24:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:51,886 INFO L225 Difference]: With dead ends: 1113 [2021-11-12 23:24:51,886 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:24:51,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:51,891 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 834 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4878.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.24ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5016.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:51,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 2281 Invalid, 475 Unknown, 0 Unchecked, 9.24ms Time], IncrementalHoareTripleChecker [14 Valid, 459 Invalid, 2 Unknown, 0 Unchecked, 5016.98ms Time] [2021-11-12 23:24:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:24:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-12 23:24:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 463 states have (on average 1.5809935205183585) internal successors, (732), 482 states have internal predecessors, (732), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (102), 98 states have call predecessors, (102), 100 states have call successors, (102) [2021-11-12 23:24:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 939 transitions. [2021-11-12 23:24:51,922 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 939 transitions. Word has length 154 [2021-11-12 23:24:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:51,922 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 939 transitions. [2021-11-12 23:24:51,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:24:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 939 transitions. [2021-11-12 23:24:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:24:51,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:51,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:51,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:52,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:52,139 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:52,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash 265233355, now seen corresponding path program 1 times [2021-11-12 23:24:52,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:52,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417017] [2021-11-12 23:24:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:52,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:52,141 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:24:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:52,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:24:53,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:24:53,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:53,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417017] [2021-11-12 23:24:53,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417017] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:24:53,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:24:53,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:24:53,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249496392] [2021-11-12 23:24:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:53,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:53,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:53,720 INFO L87 Difference]: Start difference. First operand 599 states and 939 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:24:55,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:57,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:58,669 INFO L93 Difference]: Finished difference Result 1124 states and 1817 transitions. [2021-11-12 23:24:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 156 [2021-11-12 23:24:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:58,675 INFO L225 Difference]: With dead ends: 1124 [2021-11-12 23:24:58,675 INFO L226 Difference]: Without dead ends: 605 [2021-11-12 23:24:58,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:24:58,680 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 844 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4755.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.39ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4865.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:58,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 2281 Invalid, 474 Unknown, 0 Unchecked, 8.39ms Time], IncrementalHoareTripleChecker [12 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 4865.65ms Time] [2021-11-12 23:24:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-12 23:24:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-11-12 23:24:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 468 states have (on average 1.5747863247863247) internal successors, (737), 487 states have internal predecessors, (737), 105 states have call successors, (105), 32 states have call predecessors, (105), 31 states have return successors, (103), 98 states have call predecessors, (103), 100 states have call successors, (103) [2021-11-12 23:24:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 945 transitions. [2021-11-12 23:24:58,707 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 945 transitions. Word has length 156 [2021-11-12 23:24:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:58,707 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 945 transitions. [2021-11-12 23:24:58,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:24:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 945 transitions. [2021-11-12 23:24:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:24:58,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:58,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:58,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:58,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:58,932 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1254440747, now seen corresponding path program 1 times [2021-11-12 23:24:58,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:58,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056103211] [2021-11-12 23:24:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:58,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:58,934 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:58,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:24:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:59,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:24:59,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:25:00,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:00,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056103211] [2021-11-12 23:25:00,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056103211] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:25:00,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:25:00,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:25:00,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077683437] [2021-11-12 23:25:00,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:00,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:25:00,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:00,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:25:00,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:25:00,221 INFO L87 Difference]: Start difference. First operand 605 states and 945 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:25:02,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:04,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:05,015 INFO L93 Difference]: Finished difference Result 1137 states and 1828 transitions. [2021-11-12 23:25:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:25:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 158 [2021-11-12 23:25:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:05,019 INFO L225 Difference]: With dead ends: 1137 [2021-11-12 23:25:05,019 INFO L226 Difference]: Without dead ends: 612 [2021-11-12 23:25:05,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:25:05,022 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 841 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4645.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.24ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4752.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:05,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 2281 Invalid, 473 Unknown, 0 Unchecked, 5.24ms Time], IncrementalHoareTripleChecker [10 Valid, 461 Invalid, 2 Unknown, 0 Unchecked, 4752.37ms Time] [2021-11-12 23:25:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-12 23:25:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2021-11-12 23:25:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 474 states have (on average 1.5675105485232068) internal successors, (743), 493 states have internal predecessors, (743), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (104), 98 states have call predecessors, (104), 100 states have call successors, (104) [2021-11-12 23:25:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 952 transitions. [2021-11-12 23:25:05,045 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 952 transitions. Word has length 158 [2021-11-12 23:25:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:05,046 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 952 transitions. [2021-11-12 23:25:05,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 23:25:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 952 transitions. [2021-11-12 23:25:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:25:05,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:05,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:05,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:05,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:05,270 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1354321163, now seen corresponding path program 1 times [2021-11-12 23:25:05,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:05,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662091370] [2021-11-12 23:25:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:05,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:05,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:05,273 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:05,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:25:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:05,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:25:05,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:25:06,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:25:07,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:07,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662091370] [2021-11-12 23:25:07,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662091370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:07,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [140099504] [2021-11-12 23:25:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:07,545 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:07,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:07,550 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:07,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:25:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:08,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:25:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:25:08,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:25:09,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [140099504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:09,355 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:25:09,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:25:09,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942299286] [2021-11-12 23:25:09,355 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:09,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:25:09,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:25:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:25:09,357 INFO L87 Difference]: Start difference. First operand 612 states and 952 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:25:11,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:12,052 INFO L93 Difference]: Finished difference Result 1140 states and 1811 transitions. [2021-11-12 23:25:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:25:12,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 160 [2021-11-12 23:25:12,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:12,058 INFO L225 Difference]: With dead ends: 1140 [2021-11-12 23:25:12,058 INFO L226 Difference]: Without dead ends: 608 [2021-11-12 23:25:12,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:25:12,061 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 1991 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 565 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2529.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.41ms SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2640.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:12,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 822 Invalid, 672 Unknown, 0 Unchecked, 6.41ms Time], IncrementalHoareTripleChecker [565 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 2640.50ms Time] [2021-11-12 23:25:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-12 23:25:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2021-11-12 23:25:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 472 states have (on average 1.5635593220338984) internal successors, (738), 490 states have internal predecessors, (738), 103 states have call successors, (103), 33 states have call predecessors, (103), 32 states have return successors, (103), 97 states have call predecessors, (103), 99 states have call successors, (103) [2021-11-12 23:25:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 944 transitions. [2021-11-12 23:25:12,088 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 944 transitions. Word has length 160 [2021-11-12 23:25:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:12,088 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 944 transitions. [2021-11-12 23:25:12,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:25:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 944 transitions. [2021-11-12 23:25:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 23:25:12,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:12,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:12,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:12,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-12 23:25:12,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:12,513 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:12,513 INFO L85 PathProgramCache]: Analyzing trace with hash -965872005, now seen corresponding path program 1 times [2021-11-12 23:25:12,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:12,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444561773] [2021-11-12 23:25:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:12,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:12,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:12,515 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:12,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 23:25:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:12,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:25:13,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:25:13,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:25:15,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:15,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444561773] [2021-11-12 23:25:15,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444561773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:15,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107443933] [2021-11-12 23:25:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:15,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:15,039 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:15,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 23:25:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:25:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:25:15,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:25:16,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107443933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:16,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203393651] [2021-11-12 23:25:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:16,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:16,768 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:16,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-12 23:25:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:25:17,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:25:17,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:25:18,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203393651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:18,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:18,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:25:18,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461701511] [2021-11-12 23:25:18,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:18,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:25:18,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:18,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:25:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:25:18,360 INFO L87 Difference]: Start difference. First operand 608 states and 944 transitions. Second operand has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:25:20,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:22,388 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:24,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:26,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:28,404 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:30,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:40,707 INFO L93 Difference]: Finished difference Result 1929 states and 3119 transitions. [2021-11-12 23:25:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:25:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 161 [2021-11-12 23:25:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:40,715 INFO L225 Difference]: With dead ends: 1929 [2021-11-12 23:25:40,715 INFO L226 Difference]: Without dead ends: 1401 [2021-11-12 23:25:40,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 946 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:25:40,718 INFO L933 BasicCegarLoop]: 1799 mSDtfsCounter, 6942 mSDsluCounter, 4993 mSDsCounter, 0 mSdLazyCounter, 9824 mSolverCounterSat, 2713 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20672.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7026 SdHoareTripleChecker+Valid, 6792 SdHoareTripleChecker+Invalid, 12543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.50ms SdHoareTripleChecker+Time, 2713 IncrementalHoareTripleChecker+Valid, 9824 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21954.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:40,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7026 Valid, 6792 Invalid, 12543 Unknown, 0 Unchecked, 54.50ms Time], IncrementalHoareTripleChecker [2713 Valid, 9824 Invalid, 6 Unknown, 0 Unchecked, 21954.75ms Time] [2021-11-12 23:25:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-11-12 23:25:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1251. [2021-11-12 23:25:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 950 states have (on average 1.5842105263157895) internal successors, (1505), 989 states have internal predecessors, (1505), 235 states have call successors, (235), 59 states have call predecessors, (235), 65 states have return successors, (258), 233 states have call predecessors, (258), 231 states have call successors, (258) [2021-11-12 23:25:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1998 transitions. [2021-11-12 23:25:40,793 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1998 transitions. Word has length 161 [2021-11-12 23:25:40,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1998 transitions. [2021-11-12 23:25:40,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.38888888888889) internal successors, (187), 14 states have internal predecessors, (187), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:25:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1998 transitions. [2021-11-12 23:25:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-12 23:25:40,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:40,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:40,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:41,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-12 23:25:41,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:41,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:41,421 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -122164554, now seen corresponding path program 1 times [2021-11-12 23:25:41,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:41,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864730964] [2021-11-12 23:25:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:41,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:41,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:41,423 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:41,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:25:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:41,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:25:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:25:42,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:25:42,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:42,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864730964] [2021-11-12 23:25:42,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864730964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:42,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:42,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:25:42,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786911662] [2021-11-12 23:25:42,643 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:42,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:25:42,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:42,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:25:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:25:42,644 INFO L87 Difference]: Start difference. First operand 1251 states and 1998 transitions. Second operand has 10 states, 9 states have (on average 19.22222222222222) internal successors, (173), 9 states have internal predecessors, (173), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:25:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:42,836 INFO L93 Difference]: Finished difference Result 1782 states and 2853 transitions. [2021-11-12 23:25:42,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:25:42,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.22222222222222) internal successors, (173), 9 states have internal predecessors, (173), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 163 [2021-11-12 23:25:42,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:42,843 INFO L225 Difference]: With dead ends: 1782 [2021-11-12 23:25:42,843 INFO L226 Difference]: Without dead ends: 601 [2021-11-12 23:25:42,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:25:42,850 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 76 mSDsluCounter, 6100 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6983 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:42,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 6983 Invalid, 103 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 131.71ms Time] [2021-11-12 23:25:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-12 23:25:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 601. [2021-11-12 23:25:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 467 states have (on average 1.5588865096359743) internal successors, (728), 485 states have internal predecessors, (728), 101 states have call successors, (101), 33 states have call predecessors, (101), 32 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-12 23:25:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 930 transitions. [2021-11-12 23:25:42,878 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 930 transitions. Word has length 163 [2021-11-12 23:25:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:42,878 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 930 transitions. [2021-11-12 23:25:42,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.22222222222222) internal successors, (173), 9 states have internal predecessors, (173), 3 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-12 23:25:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 930 transitions. [2021-11-12 23:25:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-12 23:25:42,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:42,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:42,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:43,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:43,103 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1418612984, now seen corresponding path program 1 times [2021-11-12 23:25:43,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:43,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552888078] [2021-11-12 23:25:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:43,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:43,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:43,105 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:43,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:25:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:43,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:25:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:25:44,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:25:44,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:44,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552888078] [2021-11-12 23:25:44,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552888078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:44,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2143798820] [2021-11-12 23:25:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:44,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:25:44,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:25:45,000 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:25:45,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 23:25:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:25:45,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:25:45,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:25:46,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2143798820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:46,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87520262] [2021-11-12 23:25:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:46,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:25:46,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:25:46,644 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:25:46,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 23:25:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:25:46,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:25:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:25:48,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87520262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:48,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:48,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:25:48,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708278414] [2021-11-12 23:25:48,154 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:48,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:25:48,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:25:48,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:25:48,156 INFO L87 Difference]: Start difference. First operand 601 states and 930 transitions. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:25:50,199 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:52,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:54,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:56,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:58,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:00,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:02,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:05,586 INFO L93 Difference]: Finished difference Result 1131 states and 1791 transitions. [2021-11-12 23:26:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:26:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) Word has length 169 [2021-11-12 23:26:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:05,590 INFO L225 Difference]: With dead ends: 1131 [2021-11-12 23:26:05,590 INFO L226 Difference]: Without dead ends: 608 [2021-11-12 23:26:05,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:26:05,593 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 2009 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 575 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16818.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2009 SdHoareTripleChecker+Valid, 2894 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.47ms SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17289.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:05,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2009 Valid, 2894 Invalid, 4901 Unknown, 0 Unchecked, 32.47ms Time], IncrementalHoareTripleChecker [575 Valid, 4319 Invalid, 7 Unknown, 0 Unchecked, 17289.35ms Time] [2021-11-12 23:26:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-12 23:26:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 605. [2021-11-12 23:26:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 470 states have (on average 1.5553191489361702) internal successors, (731), 488 states have internal predecessors, (731), 101 states have call successors, (101), 33 states have call predecessors, (101), 33 states have return successors, (106), 96 states have call predecessors, (106), 97 states have call successors, (106) [2021-11-12 23:26:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 938 transitions. [2021-11-12 23:26:05,624 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 938 transitions. Word has length 169 [2021-11-12 23:26:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:05,625 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 938 transitions. [2021-11-12 23:26:05,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 12 states have internal predecessors, (189), 8 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 10 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:26:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 938 transitions. [2021-11-12 23:26:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:26:05,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:05,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-12 23:26:05,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:05,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:06,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-12 23:26:06,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:26:06,249 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:06,249 INFO L85 PathProgramCache]: Analyzing trace with hash -429180017, now seen corresponding path program 1 times [2021-11-12 23:26:06,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:06,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705670446] [2021-11-12 23:26:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:06,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:06,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:06,251 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 23:26:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:06,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:26:06,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:26:07,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:26:07,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:07,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705670446] [2021-11-12 23:26:07,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705670446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:07,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592064258] [2021-11-12 23:26:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:07,609 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:26:07,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:26:07,609 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:26:07,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:26:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:26:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:26:08,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:26:08,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592064258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:08,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068276104] [2021-11-12 23:26:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:08,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:08,935 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:08,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 23:26:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:26:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:26:09,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:26:10,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068276104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:10,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:26:10,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:26:10,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572614220] [2021-11-12 23:26:10,095 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:26:10,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:26:10,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:26:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:26:10,096 INFO L87 Difference]: Start difference. First operand 605 states and 938 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-12 23:26:12,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:14,120 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:18,803 INFO L93 Difference]: Finished difference Result 2179 states and 3509 transitions. [2021-11-12 23:26:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:26:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) Word has length 170 [2021-11-12 23:26:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:18,815 INFO L225 Difference]: With dead ends: 2179 [2021-11-12 23:26:18,815 INFO L226 Difference]: Without dead ends: 1652 [2021-11-12 23:26:18,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1014 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:26:18,819 INFO L933 BasicCegarLoop]: 1433 mSDtfsCounter, 4214 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 1244 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7789.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4303 SdHoareTripleChecker+Valid, 3016 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.04ms SdHoareTripleChecker+Time, 1244 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8422.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:18,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4303 Valid, 3016 Invalid, 5164 Unknown, 0 Unchecked, 24.04ms Time], IncrementalHoareTripleChecker [1244 Valid, 3918 Invalid, 2 Unknown, 0 Unchecked, 8422.69ms Time] [2021-11-12 23:26:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-11-12 23:26:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1594. [2021-11-12 23:26:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1230 states have (on average 1.5764227642276423) internal successors, (1939), 1275 states have internal predecessors, (1939), 277 states have call successors, (277), 86 states have call predecessors, (277), 86 states have return successors, (312), 269 states have call predecessors, (312), 273 states have call successors, (312) [2021-11-12 23:26:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2528 transitions. [2021-11-12 23:26:18,910 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2528 transitions. Word has length 170 [2021-11-12 23:26:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:18,910 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2528 transitions. [2021-11-12 23:26:18,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (27), 7 states have call predecessors, (27), 5 states have call successors, (27) [2021-11-12 23:26:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2528 transitions. [2021-11-12 23:26:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-12 23:26:18,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:18,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:18,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:19,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 23:26:19,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:19,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:26:19,519 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1155213827, now seen corresponding path program 1 times [2021-11-12 23:26:19,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:19,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257563732] [2021-11-12 23:26:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:19,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:19,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:19,521 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:19,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:26:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:20,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:26:22,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:26:26,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:26,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257563732] [2021-11-12 23:26:26,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257563732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:26,668 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:26,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 23:26:26,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779483197] [2021-11-12 23:26:26,669 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:26,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:26:26,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:26:26,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:26:26,670 INFO L87 Difference]: Start difference. First operand 1594 states and 2528 transitions. Second operand has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-12 23:26:28,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:30,706 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:32,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:34,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:36,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:45,010 INFO L93 Difference]: Finished difference Result 7382 states and 11959 transitions. [2021-11-12 23:26:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:26:45,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) Word has length 172 [2021-11-12 23:26:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:45,047 INFO L225 Difference]: With dead ends: 7382 [2021-11-12 23:26:45,047 INFO L226 Difference]: Without dead ends: 5866 [2021-11-12 23:26:45,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:26:45,052 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 6232 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 6314 mSolverCounterSat, 1669 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16367.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6350 SdHoareTripleChecker+Valid, 3909 SdHoareTripleChecker+Invalid, 7988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.93ms SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 6314 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17390.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:45,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6350 Valid, 3909 Invalid, 7988 Unknown, 0 Unchecked, 31.93ms Time], IncrementalHoareTripleChecker [1669 Valid, 6314 Invalid, 5 Unknown, 0 Unchecked, 17390.84ms Time] [2021-11-12 23:26:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-11-12 23:26:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 5513. [2021-11-12 23:26:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 4229 states have (on average 1.597540789784819) internal successors, (6756), 4385 states have internal predecessors, (6756), 1005 states have call successors, (1005), 281 states have call predecessors, (1005), 278 states have return successors, (1133), 915 states have call predecessors, (1133), 1001 states have call successors, (1133) [2021-11-12 23:26:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 8894 transitions. [2021-11-12 23:26:45,450 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 8894 transitions. Word has length 172 [2021-11-12 23:26:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:45,450 INFO L470 AbstractCegarLoop]: Abstraction has 5513 states and 8894 transitions. [2021-11-12 23:26:45,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 11 states have call successors, (38), 7 states have call predecessors, (38), 7 states have return successors, (37), 11 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-12 23:26:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 8894 transitions. [2021-11-12 23:26:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 23:26:45,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:45,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:45,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:45,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:45,673 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 402569537, now seen corresponding path program 1 times [2021-11-12 23:26:45,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:45,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070441089] [2021-11-12 23:26:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:45,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:45,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:45,676 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:45,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:26:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:26:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:26:46,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:26:47,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:47,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070441089] [2021-11-12 23:26:47,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070441089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:47,384 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:47,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:26:47,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592808441] [2021-11-12 23:26:47,385 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:47,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:26:47,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:47,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:26:47,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:26:47,386 INFO L87 Difference]: Start difference. First operand 5513 states and 8894 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:26:49,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:51,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:53,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:26:55,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:04,061 INFO L93 Difference]: Finished difference Result 17286 states and 28688 transitions. [2021-11-12 23:27:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:27:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) Word has length 176 [2021-11-12 23:27:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:04,139 INFO L225 Difference]: With dead ends: 17286 [2021-11-12 23:27:04,140 INFO L226 Difference]: Without dead ends: 11833 [2021-11-12 23:27:04,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:27:04,226 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 4096 mSDsluCounter, 3245 mSDsCounter, 0 mSdLazyCounter, 8166 mSolverCounterSat, 1395 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14777.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4204 SdHoareTripleChecker+Valid, 4992 SdHoareTripleChecker+Invalid, 9565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.53ms SdHoareTripleChecker+Time, 1395 IncrementalHoareTripleChecker+Valid, 8166 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15824.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:04,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4204 Valid, 4992 Invalid, 9565 Unknown, 0 Unchecked, 35.53ms Time], IncrementalHoareTripleChecker [1395 Valid, 8166 Invalid, 4 Unknown, 0 Unchecked, 15824.97ms Time] [2021-11-12 23:27:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11833 states. [2021-11-12 23:27:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11833 to 10818. [2021-11-12 23:27:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10818 states, 8023 states have (on average 1.5866882712202417) internal successors, (12730), 8428 states have internal predecessors, (12730), 2279 states have call successors, (2279), 476 states have call predecessors, (2279), 515 states have return successors, (2708), 2146 states have call predecessors, (2708), 2275 states have call successors, (2708) [2021-11-12 23:27:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10818 states to 10818 states and 17717 transitions. [2021-11-12 23:27:05,216 INFO L78 Accepts]: Start accepts. Automaton has 10818 states and 17717 transitions. Word has length 176 [2021-11-12 23:27:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:05,217 INFO L470 AbstractCegarLoop]: Abstraction has 10818 states and 17717 transitions. [2021-11-12 23:27:05,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 12 states have internal predecessors, (202), 8 states have call successors, (35), 6 states have call predecessors, (35), 7 states have return successors, (35), 10 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:27:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10818 states and 17717 transitions. [2021-11-12 23:27:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 23:27:05,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:05,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:05,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:05,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:05,435 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash -813584189, now seen corresponding path program 1 times [2021-11-12 23:27:05,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:05,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020607006] [2021-11-12 23:27:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:05,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:05,438 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:05,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:27:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:27:06,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:27:06,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:27:07,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:07,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020607006] [2021-11-12 23:27:07,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020607006] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:07,773 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:07,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 23:27:07,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123366433] [2021-11-12 23:27:07,773 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:07,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:27:07,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:07,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:27:07,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:27:07,775 INFO L87 Difference]: Start difference. First operand 10818 states and 17717 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:27:09,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:11,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:13,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:15,809 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:17,815 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:22,453 INFO L93 Difference]: Finished difference Result 18774 states and 30738 transitions. [2021-11-12 23:27:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:27:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) Word has length 176 [2021-11-12 23:27:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:22,532 INFO L225 Difference]: With dead ends: 18774 [2021-11-12 23:27:22,533 INFO L226 Difference]: Without dead ends: 10788 [2021-11-12 23:27:22,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:27:22,569 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 1354 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 5397 mSolverCounterSat, 381 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13431.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 3483 SdHoareTripleChecker+Invalid, 5783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.96ms SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 5397 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13965.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:22,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 3483 Invalid, 5783 Unknown, 0 Unchecked, 17.96ms Time], IncrementalHoareTripleChecker [381 Valid, 5397 Invalid, 5 Unknown, 0 Unchecked, 13965.14ms Time] [2021-11-12 23:27:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2021-11-12 23:27:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10788. [2021-11-12 23:27:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10788 states, 8008 states have (on average 1.585914085914086) internal successors, (12700), 8413 states have internal predecessors, (12700), 2264 states have call successors, (2264), 476 states have call predecessors, (2264), 515 states have return successors, (2693), 2131 states have call predecessors, (2693), 2260 states have call successors, (2693) [2021-11-12 23:27:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 17657 transitions. [2021-11-12 23:27:23,369 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 17657 transitions. Word has length 176 [2021-11-12 23:27:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:23,370 INFO L470 AbstractCegarLoop]: Abstraction has 10788 states and 17657 transitions. [2021-11-12 23:27:23,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 14 states have internal predecessors, (184), 8 states have call successors, (33), 5 states have call predecessors, (33), 10 states have return successors, (35), 12 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-12 23:27:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 17657 transitions. [2021-11-12 23:27:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-12 23:27:23,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:23,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:23,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-12 23:27:23,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:23,595 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1429154660, now seen corresponding path program 1 times [2021-11-12 23:27:23,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:23,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815523328] [2021-11-12 23:27:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:23,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:23,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:23,598 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:23,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:27:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:27:24,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:27:24,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:27:25,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:25,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815523328] [2021-11-12 23:27:25,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815523328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:25,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:25,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:27:25,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948399075] [2021-11-12 23:27:25,154 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:25,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:27:25,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:27:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:27:25,155 INFO L87 Difference]: Start difference. First operand 10788 states and 17657 transitions. Second operand has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:27:27,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:29,180 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:34,287 INFO L93 Difference]: Finished difference Result 37764 states and 63865 transitions. [2021-11-12 23:27:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:27:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 183 [2021-11-12 23:27:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:34,487 INFO L225 Difference]: With dead ends: 37764 [2021-11-12 23:27:34,488 INFO L226 Difference]: Without dead ends: 27045 [2021-11-12 23:27:34,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:34,542 INFO L933 BasicCegarLoop]: 1745 mSDtfsCounter, 4062 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 1275 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7107.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4169 SdHoareTripleChecker+Valid, 2991 SdHoareTripleChecker+Invalid, 4027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.28ms SdHoareTripleChecker+Time, 1275 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7624.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:34,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4169 Valid, 2991 Invalid, 4027 Unknown, 0 Unchecked, 17.28ms Time], IncrementalHoareTripleChecker [1275 Valid, 2750 Invalid, 2 Unknown, 0 Unchecked, 7624.40ms Time] [2021-11-12 23:27:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27045 states. [2021-11-12 23:27:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27045 to 24317. [2021-11-12 23:27:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24317 states, 17306 states have (on average 1.5748873223159598) internal successors, (27255), 18398 states have internal predecessors, (27255), 5979 states have call successors, (5979), 869 states have call predecessors, (5979), 1031 states have return successors, (7456), 5784 states have call predecessors, (7456), 5975 states have call successors, (7456) [2021-11-12 23:27:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24317 states to 24317 states and 40690 transitions. [2021-11-12 23:27:36,625 INFO L78 Accepts]: Start accepts. Automaton has 24317 states and 40690 transitions. Word has length 183 [2021-11-12 23:27:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:36,625 INFO L470 AbstractCegarLoop]: Abstraction has 24317 states and 40690 transitions. [2021-11-12 23:27:36,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:27:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 24317 states and 40690 transitions. [2021-11-12 23:27:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:27:36,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:36,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:36,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:27:36,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:27:36,829 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:27:36,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:27:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1395351820, now seen corresponding path program 1 times [2021-11-12 23:27:36,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:27:36,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427668987] [2021-11-12 23:27:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:27:36,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:27:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:27:36,831 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:27:36,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:27:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:27:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:27:37,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:27:37,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:27:38,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:38,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427668987] [2021-11-12 23:27:38,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427668987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:27:38,367 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:27:38,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:27:38,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337671412] [2021-11-12 23:27:38,368 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:27:38,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:27:38,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:27:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:27:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:27:38,369 INFO L87 Difference]: Start difference. First operand 24317 states and 40690 transitions. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:27:40,509 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:42,516 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:44,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:27:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:27:53,516 INFO L93 Difference]: Finished difference Result 94981 states and 164828 transitions. [2021-11-12 23:27:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:27:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) Word has length 184 [2021-11-12 23:27:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:27:53,959 INFO L225 Difference]: With dead ends: 94981 [2021-11-12 23:27:53,959 INFO L226 Difference]: Without dead ends: 70741 [2021-11-12 23:27:54,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:27:54,103 INFO L933 BasicCegarLoop]: 1753 mSDtfsCounter, 3202 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 3541 mSolverCounterSat, 1171 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9595.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 4715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.31ms SdHoareTripleChecker+Time, 1171 IncrementalHoareTripleChecker+Valid, 3541 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10189.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:27:54,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3310 Valid, 3287 Invalid, 4715 Unknown, 0 Unchecked, 20.31ms Time], IncrementalHoareTripleChecker [1171 Valid, 3541 Invalid, 3 Unknown, 0 Unchecked, 10189.04ms Time] [2021-11-12 23:27:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70741 states. [2021-11-12 23:27:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70741 to 62127. [2021-11-12 23:27:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62127 states, 42274 states have (on average 1.5637980791976156) internal successors, (66108), 45388 states have internal predecessors, (66108), 17612 states have call successors, (17612), 1658 states have call predecessors, (17612), 2240 states have return successors, (23133), 17437 states have call predecessors, (23133), 17608 states have call successors, (23133) [2021-11-12 23:27:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62127 states to 62127 states and 106853 transitions. [2021-11-12 23:27:59,885 INFO L78 Accepts]: Start accepts. Automaton has 62127 states and 106853 transitions. Word has length 184 [2021-11-12 23:27:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:27:59,887 INFO L470 AbstractCegarLoop]: Abstraction has 62127 states and 106853 transitions. [2021-11-12 23:27:59,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:27:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 62127 states and 106853 transitions. [2021-11-12 23:27:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 23:27:59,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:27:59,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:27:59,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:00,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:00,115 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:00,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash 917298913, now seen corresponding path program 1 times [2021-11-12 23:28:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:00,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876322008] [2021-11-12 23:28:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:00,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:00,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:00,117 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:00,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37df980e-84f8-40aa-a9a7-bb6d7f22b866/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:28:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:28:01,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:28:01,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:01,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876322008] [2021-11-12 23:28:01,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876322008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:01,575 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:28:01,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 23:28:01,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371138658] [2021-11-12 23:28:01,576 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:01,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:28:01,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:28:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:28:01,577 INFO L87 Difference]: Start difference. First operand 62127 states and 106853 transitions. Second operand has 8 states, 8 states have (on average 24.75) internal successors, (198), 8 states have internal predecessors, (198), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:28:03,597 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:05,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:28:07,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []