./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:19,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:19,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:19,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:19,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:19,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:19,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:19,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:19,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:19,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:19,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:19,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:19,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:19,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:19,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:19,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:19,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:19,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:19,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:19,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:19,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:19,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:19,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:19,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:19,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:19,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:19,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:19,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:19,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:19,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:19,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:19,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:19,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:19,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:19,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:19,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:19,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:19,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:19,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:19,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:19,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:19,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:07:19,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:19,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:19,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:19,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:19,537 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:19,537 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:19,538 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:19,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:07:19,538 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:19,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:19,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:07:19,540 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:07:19,540 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:19,540 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:07:19,541 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:07:19,541 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:07:19,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:19,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:07:19,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:07:19,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:07:19,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:19,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:19,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:19,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:19,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:19,544 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:07:19,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:19,544 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:19,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:19,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:19,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:19,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:19,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:19,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:19,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:19,548 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:07:19,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:07:19,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:19,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:19,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:19,549 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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 [2021-11-12 23:07:19,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:19,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:19,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:19,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:19,805 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:19,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-12 23:07:19,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/4d06ab381/664812c89a3a452ab81097466d4f2ee7/FLAGd63aec877 [2021-11-12 23:07:20,648 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:20,649 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-12 23:07:20,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/4d06ab381/664812c89a3a452ab81097466d4f2ee7/FLAGd63aec877 [2021-11-12 23:07:20,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/4d06ab381/664812c89a3a452ab81097466d4f2ee7 [2021-11-12 23:07:20,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:07:20,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:07:20,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:20,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:07:20,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:07:20,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:20" (1/1) ... [2021-11-12 23:07:20,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f714330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:20, skipping insertion in model container [2021-11-12 23:07:20,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:20" (1/1) ... [2021-11-12 23:07:20,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:07:20,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:21,220 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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-12 23:07:21,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:21,505 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 23:07:21,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d37fdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:21, skipping insertion in model container [2021-11-12 23:07:21,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:21,506 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:07:21,508 INFO L158 Benchmark]: Toolchain (without parser) took 674.26ms. Allocated memory is still 138.4MB. Free memory was 108.2MB in the beginning and 80.1MB in the end (delta: 28.1MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-11-12 23:07:21,509 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:07:21,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 671.80ms. Allocated memory is still 138.4MB. Free memory was 108.0MB in the beginning and 80.1MB in the end (delta: 27.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-11-12 23:07:21,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 671.80ms. Allocated memory is still 138.4MB. Free memory was 108.0MB in the beginning and 80.1MB in the end (delta: 27.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2448]: 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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:23,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:23,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:23,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:23,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:23,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:23,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:23,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:23,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:23,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:23,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:23,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:23,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:23,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:23,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:23,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:23,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:23,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:23,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:23,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:23,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:23,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:23,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:23,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:23,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:23,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:23,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:23,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:23,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:23,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:23,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:23,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:23,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:23,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:23,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:23,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:23,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:23,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:23,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:23,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:23,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:23,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:07:23,974 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:23,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:23,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:23,976 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:23,976 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:23,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:23,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:23,977 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:23,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:23,978 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:23,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:23,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:07:23,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:07:23,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:23,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:23,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:23,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:23,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:23,982 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:07:23,982 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:07:23,983 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:07:23,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:23,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:23,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:23,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:23,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:07:23,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:23,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:23,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:23,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:23,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:23,985 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:07:23,985 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:07:23,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:23,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:23,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:23,987 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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa4154afcc1fa94c570756c4d3485a9415aeef22801b46450f13cd61ecf8230 [2021-11-12 23:07:24,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:07:24,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:07:24,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:07:24,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:07:24,445 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:07:24,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-12 23:07:24,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/6e9c85713/e591a286eca8435286559f6b6670c37c/FLAG514214943 [2021-11-12 23:07:25,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:07:25,291 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c [2021-11-12 23:07:25,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/6e9c85713/e591a286eca8435286559f6b6670c37c/FLAG514214943 [2021-11-12 23:07:25,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/data/6e9c85713/e591a286eca8435286559f6b6670c37c [2021-11-12 23:07:25,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:07:25,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:07:25,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:25,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:07:25,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:07:25,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:25" (1/1) ... [2021-11-12 23:07:25,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c641eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:25, skipping insertion in model container [2021-11-12 23:07:25,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:07:25" (1/1) ... [2021-11-12 23:07:25,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:07:25,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:26,031 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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-12 23:07:26,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:26,282 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:07:26,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:07:26,353 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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-12 23:07:26,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:26,448 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:07:26,478 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_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/sv-benchmarks/c/product-lines/elevator_spec3_product30.cil.c[14523,14536] [2021-11-12 23:07:26,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:07:26,599 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:07:26,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26 WrapperNode [2021-11-12 23:07:26,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:07:26,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:26,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:07:26,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:07:26,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:07:26,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:07:26,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:07:26,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:07:26,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:07:26,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:07:26,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:07:26,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:07:26,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (1/1) ... [2021-11-12 23:07:26,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:26,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:07:26,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:07:26,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:07:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:07:27,001 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:07:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:07:27,001 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:07:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:07:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:07:27,001 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:07:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:07:27,002 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:07:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:07:27,002 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:07:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:07:27,002 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:07:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:07:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 23:07:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:07:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:07:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:07:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:07:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:07:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:07:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:07:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:07:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:07:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:07:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:07:27,005 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:07:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:07:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:07:27,005 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:07:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 23:07:27,006 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 23:07:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:07:27,007 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:07:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 23:07:27,007 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 23:07:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:07:27,007 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:07:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:07:27,008 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:07:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:07:27,008 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:07:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:07:27,008 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:07:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:07:27,009 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:07:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:07:27,009 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:07:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:07:27,010 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:07:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:07:27,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:07:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:07:27,012 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 23:07:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:07:27,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:07:27,013 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:07:27,013 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:07:30,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:07:30,963 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:07:30,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:30 BoogieIcfgContainer [2021-11-12 23:07:30,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:07:30,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:07:30,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:07:30,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:07:30,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:07:25" (1/3) ... [2021-11-12 23:07:30,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38105288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:30, skipping insertion in model container [2021-11-12 23:07:30,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:07:26" (2/3) ... [2021-11-12 23:07:30,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38105288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:07:30, skipping insertion in model container [2021-11-12 23:07:30,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:07:30" (3/3) ... [2021-11-12 23:07:30,979 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product30.cil.c [2021-11-12 23:07:30,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:07:30,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:07:31,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:07:31,050 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 23:07:31,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:07:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 605 states, 468 states have (on average 1.6752136752136753) internal successors, (784), 488 states have internal predecessors, (784), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-12 23:07:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:07:31,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:31,097 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:07:31,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1554402963, now seen corresponding path program 1 times [2021-11-12 23:07:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:31,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152839373] [2021-11-12 23:07:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:31,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:31,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:31,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:31,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:07:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:31,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:07:31,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:32,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:32,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:32,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152839373] [2021-11-12 23:07:32,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152839373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:32,449 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:32,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:07:32,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173535326] [2021-11-12 23:07:32,452 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:32,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:07:32,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:07:32,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:32,492 INFO L87 Difference]: Start difference. First operand has 605 states, 468 states have (on average 1.6752136752136753) internal successors, (784), 488 states have internal predecessors, (784), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:32,928 INFO L93 Difference]: Finished difference Result 1213 states and 2021 transitions. [2021-11-12 23:07:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:07:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 67 [2021-11-12 23:07:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:32,955 INFO L225 Difference]: With dead ends: 1213 [2021-11-12 23:07:32,956 INFO L226 Difference]: Without dead ends: 616 [2021-11-12 23:07:32,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 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 23:07:32,974 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 118 mSDsluCounter, 8660 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 218.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 9642 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.44ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 244.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:32,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 9642 Invalid, 143 Unknown, 0 Unchecked, 41.44ms Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 244.15ms Time] [2021-11-12 23:07:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-12 23:07:33,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 608. [2021-11-12 23:07:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 471 states have (on average 1.6666666666666667) internal successors, (785), 491 states have internal predecessors, (785), 109 states have call successors, (109), 27 states have call predecessors, (109), 27 states have return successors, (108), 103 states have call predecessors, (108), 106 states have call successors, (108) [2021-11-12 23:07:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1002 transitions. [2021-11-12 23:07:33,143 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1002 transitions. Word has length 67 [2021-11-12 23:07:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:33,144 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1002 transitions. [2021-11-12 23:07:33,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1002 transitions. [2021-11-12 23:07:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-12 23:07:33,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:33,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:33,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:33,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:33,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash -351252067, now seen corresponding path program 1 times [2021-11-12 23:07:33,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:33,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840553050] [2021-11-12 23:07:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:33,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:33,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:33,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:33,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:07:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:07:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:34,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:34,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:34,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840553050] [2021-11-12 23:07:34,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840553050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:34,540 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:34,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:07:34,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562807019] [2021-11-12 23:07:34,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:34,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:07:34,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:07:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:34,544 INFO L87 Difference]: Start difference. First operand 608 states and 1002 transitions. Second operand has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:34,864 INFO L93 Difference]: Finished difference Result 1221 states and 2022 transitions. [2021-11-12 23:07:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:07:34,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 68 [2021-11-12 23:07:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:34,873 INFO L225 Difference]: With dead ends: 1221 [2021-11-12 23:07:34,873 INFO L226 Difference]: Without dead ends: 629 [2021-11-12 23:07:34,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 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 23:07:34,878 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 104 mSDsluCounter, 6675 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 7658 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.66ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 211.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:34,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 7658 Invalid, 116 Unknown, 0 Unchecked, 17.66ms Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 211.74ms Time] [2021-11-12 23:07:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-12 23:07:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 621. [2021-11-12 23:07:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 481 states have (on average 1.6632016632016633) internal successors, (800), 503 states have internal predecessors, (800), 110 states have call successors, (110), 27 states have call predecessors, (110), 29 states have return successors, (111), 104 states have call predecessors, (111), 107 states have call successors, (111) [2021-11-12 23:07:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1021 transitions. [2021-11-12 23:07:34,915 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1021 transitions. Word has length 68 [2021-11-12 23:07:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1021 transitions. [2021-11-12 23:07:34,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1021 transitions. [2021-11-12 23:07:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 23:07:34,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:34,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:34,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:35,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:35,139 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash -261309449, now seen corresponding path program 1 times [2021-11-12 23:07:35,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:35,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490786117] [2021-11-12 23:07:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:35,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:35,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:35,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:07:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:07:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:35,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:36,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:36,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490786117] [2021-11-12 23:07:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490786117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:36,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:36,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:07:36,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667022789] [2021-11-12 23:07:36,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:36,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:07:36,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:07:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:07:36,189 INFO L87 Difference]: Start difference. First operand 621 states and 1021 transitions. Second operand has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:36,442 INFO L93 Difference]: Finished difference Result 1247 states and 2061 transitions. [2021-11-12 23:07:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:07:36,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 69 [2021-11-12 23:07:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:36,450 INFO L225 Difference]: With dead ends: 1247 [2021-11-12 23:07:36,451 INFO L226 Difference]: Without dead ends: 642 [2021-11-12 23:07:36,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 127 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 23:07:36,456 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 103 mSDsluCounter, 6675 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 7658 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.66ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:36,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 7658 Invalid, 117 Unknown, 0 Unchecked, 15.66ms Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 171.84ms Time] [2021-11-12 23:07:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-12 23:07:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 634. [2021-11-12 23:07:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 491 states have (on average 1.659877800407332) internal successors, (815), 515 states have internal predecessors, (815), 111 states have call successors, (111), 27 states have call predecessors, (111), 31 states have return successors, (114), 105 states have call predecessors, (114), 108 states have call successors, (114) [2021-11-12 23:07:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1040 transitions. [2021-11-12 23:07:36,509 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1040 transitions. Word has length 69 [2021-11-12 23:07:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:36,511 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1040 transitions. [2021-11-12 23:07:36,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1040 transitions. [2021-11-12 23:07:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:07:36,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:36,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:36,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:36,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:36,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1837459390, now seen corresponding path program 1 times [2021-11-12 23:07:36,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:36,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813168400] [2021-11-12 23:07:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:36,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:36,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:36,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:36,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:07:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:07:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:37,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:37,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:37,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813168400] [2021-11-12 23:07:37,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813168400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:37,790 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:37,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:07:37,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297030669] [2021-11-12 23:07:37,791 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:37,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:07:37,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:07:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:07:37,792 INFO L87 Difference]: Start difference. First operand 634 states and 1040 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:07:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:37,969 INFO L93 Difference]: Finished difference Result 1267 states and 2091 transitions. [2021-11-12 23:07:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:07:37,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-12 23:07:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:37,979 INFO L225 Difference]: With dead ends: 1267 [2021-11-12 23:07:37,979 INFO L226 Difference]: Without dead ends: 649 [2021-11-12 23:07:37,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 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 23:07:37,994 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 181 mSDsluCounter, 4723 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 5694 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.53ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:37,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 5694 Invalid, 81 Unknown, 0 Unchecked, 10.53ms Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 114.14ms Time] [2021-11-12 23:07:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-11-12 23:07:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 647. [2021-11-12 23:07:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 501 states have (on average 1.656686626746507) internal successors, (830), 527 states have internal predecessors, (830), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 106 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-12 23:07:38,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1062 transitions. [2021-11-12 23:07:38,039 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1062 transitions. Word has length 70 [2021-11-12 23:07:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:38,040 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1062 transitions. [2021-11-12 23:07:38,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-12 23:07:38,040 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1062 transitions. [2021-11-12 23:07:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:07:38,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:38,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:38,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:38,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:38,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1305504091, now seen corresponding path program 1 times [2021-11-12 23:07:38,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:38,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986829802] [2021-11-12 23:07:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:38,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:38,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:38,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:38,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:07:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:07:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:38,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:39,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:39,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986829802] [2021-11-12 23:07:39,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986829802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:39,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:39,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:07:39,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666393539] [2021-11-12 23:07:39,399 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:39,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:07:39,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:07:39,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:07:39,401 INFO L87 Difference]: Start difference. First operand 647 states and 1062 transitions. Second operand has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:39,780 INFO L93 Difference]: Finished difference Result 1290 states and 2127 transitions. [2021-11-12 23:07:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:07:39,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 71 [2021-11-12 23:07:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:39,789 INFO L225 Difference]: With dead ends: 1290 [2021-11-12 23:07:39,789 INFO L226 Difference]: Without dead ends: 653 [2021-11-12 23:07:39,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 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 23:07:39,794 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 193 mSDsluCounter, 7590 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 235.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 8550 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.04ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 262.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:39,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 8550 Invalid, 208 Unknown, 0 Unchecked, 15.04ms Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 262.86ms Time] [2021-11-12 23:07:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-12 23:07:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 643. [2021-11-12 23:07:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 497 states have (on average 1.647887323943662) internal successors, (819), 523 states have internal predecessors, (819), 112 states have call successors, (112), 27 states have call predecessors, (112), 33 states have return successors, (120), 106 states have call predecessors, (120), 109 states have call successors, (120) [2021-11-12 23:07:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1051 transitions. [2021-11-12 23:07:39,833 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1051 transitions. Word has length 71 [2021-11-12 23:07:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:39,834 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 1051 transitions. [2021-11-12 23:07:39,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.090909090909091) internal successors, (67), 11 states have internal predecessors, (67), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:39,834 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1051 transitions. [2021-11-12 23:07:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-12 23:07:39,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:39,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:39,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:40,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:40,050 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1740949387, now seen corresponding path program 1 times [2021-11-12 23:07:40,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:40,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977542774] [2021-11-12 23:07:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:40,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:40,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:40,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:40,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:07:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:07:40,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:40,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:40,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:40,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977542774] [2021-11-12 23:07:40,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977542774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:40,911 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:40,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:07:40,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754460312] [2021-11-12 23:07:40,911 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:40,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:07:40,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:07:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:07:40,912 INFO L87 Difference]: Start difference. First operand 643 states and 1051 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:07:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:40,983 INFO L93 Difference]: Finished difference Result 1262 states and 2068 transitions. [2021-11-12 23:07:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:07:40,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 71 [2021-11-12 23:07:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:40,990 INFO L225 Difference]: With dead ends: 1262 [2021-11-12 23:07:40,990 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:07:40,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 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 23:07:40,995 INFO L933 BasicCegarLoop]: 971 mSDtfsCounter, 19 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:40,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2906 Invalid, 19 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 26.90ms Time] [2021-11-12 23:07:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:07:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:07:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 432 states have (on average 1.6319444444444444) internal successors, (705), 450 states have internal predecessors, (705), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:07:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 918 transitions. [2021-11-12 23:07:41,023 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 918 transitions. Word has length 71 [2021-11-12 23:07:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:41,024 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 918 transitions. [2021-11-12 23:07:41,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:07:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 918 transitions. [2021-11-12 23:07:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 23:07:41,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:41,026 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:07:41,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:41,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:41,246 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash 635469089, now seen corresponding path program 1 times [2021-11-12 23:07:41,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:41,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832488400] [2021-11-12 23:07:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:41,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:41,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:41,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:41,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:07:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:41,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:07:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:41,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:42,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:42,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832488400] [2021-11-12 23:07:42,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832488400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:42,323 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:42,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:07:42,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830042297] [2021-11-12 23:07:42,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:42,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:07:42,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:42,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:07:42,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:07:42,325 INFO L87 Difference]: Start difference. First operand 566 states and 918 transitions. Second operand has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:42,551 INFO L93 Difference]: Finished difference Result 1119 states and 1824 transitions. [2021-11-12 23:07:42,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:07:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2021-11-12 23:07:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:42,558 INFO L225 Difference]: With dead ends: 1119 [2021-11-12 23:07:42,558 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:07:42,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:07:42,563 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 51 mSDsluCounter, 7163 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8064 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:42,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 8064 Invalid, 118 Unknown, 0 Unchecked, 11.36ms Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 106.81ms Time] [2021-11-12 23:07:42,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:07:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:07:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 432 states have (on average 1.6296296296296295) internal successors, (704), 450 states have internal predecessors, (704), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:07:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 917 transitions. [2021-11-12 23:07:42,591 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 917 transitions. Word has length 72 [2021-11-12 23:07:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:42,591 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 917 transitions. [2021-11-12 23:07:42,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 917 transitions. [2021-11-12 23:07:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:07:42,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:42,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:42,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:42,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:42,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1020769888, now seen corresponding path program 1 times [2021-11-12 23:07:42,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:42,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706379891] [2021-11-12 23:07:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:42,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:42,818 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:42,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:07:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:43,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:07:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:43,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:43,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:43,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706379891] [2021-11-12 23:07:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706379891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:43,930 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:43,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:07:43,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30305738] [2021-11-12 23:07:43,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:43,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:07:43,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:07:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:07:43,932 INFO L87 Difference]: Start difference. First operand 566 states and 917 transitions. Second operand has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:44,148 INFO L93 Difference]: Finished difference Result 1119 states and 1822 transitions. [2021-11-12 23:07:44,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:07:44,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-12 23:07:44,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:44,155 INFO L225 Difference]: With dead ends: 1119 [2021-11-12 23:07:44,155 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:07:44,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 133 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 23:07:44,160 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 35 mSDsluCounter, 8063 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8964 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:44,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8964 Invalid, 126 Unknown, 0 Unchecked, 10.98ms Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 117.66ms Time] [2021-11-12 23:07:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:07:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:07:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 432 states have (on average 1.6273148148148149) internal successors, (703), 450 states have internal predecessors, (703), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:07:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 916 transitions. [2021-11-12 23:07:44,186 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 916 transitions. Word has length 73 [2021-11-12 23:07:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:44,186 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 916 transitions. [2021-11-12 23:07:44,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:44,187 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 916 transitions. [2021-11-12 23:07:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-12 23:07:44,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:44,188 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:07:44,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:44,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:44,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -238257850, now seen corresponding path program 1 times [2021-11-12 23:07:44,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:44,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352203362] [2021-11-12 23:07:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:44,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:44,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:44,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:44,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:07:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:44,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:07:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:45,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:45,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:45,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352203362] [2021-11-12 23:07:45,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352203362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:45,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:45,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:07:45,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854405720] [2021-11-12 23:07:45,507 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:45,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:07:45,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:07:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:07:45,509 INFO L87 Difference]: Start difference. First operand 566 states and 916 transitions. Second operand has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:45,703 INFO L93 Difference]: Finished difference Result 1119 states and 1820 transitions. [2021-11-12 23:07:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:07:45,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 74 [2021-11-12 23:07:45,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:45,710 INFO L225 Difference]: With dead ends: 1119 [2021-11-12 23:07:45,711 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:07:45,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 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 23:07:45,716 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 33 mSDsluCounter, 8060 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 8961 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:45,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 8961 Invalid, 115 Unknown, 0 Unchecked, 26.89ms Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 106.27ms Time] [2021-11-12 23:07:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:07:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:07:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 432 states have (on average 1.625) internal successors, (702), 450 states have internal predecessors, (702), 108 states have call successors, (108), 27 states have call predecessors, (108), 25 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-12 23:07:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 915 transitions. [2021-11-12 23:07:45,742 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 915 transitions. Word has length 74 [2021-11-12 23:07:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:45,743 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 915 transitions. [2021-11-12 23:07:45,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 4 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-12 23:07:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 915 transitions. [2021-11-12 23:07:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:07:45,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:45,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:45,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:45,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:45,969 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash -931862683, now seen corresponding path program 1 times [2021-11-12 23:07:45,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:45,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054031912] [2021-11-12 23:07:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:45,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:45,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:45,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:45,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:07:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:07:46,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:46,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:46,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:46,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054031912] [2021-11-12 23:07:46,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054031912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:46,937 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:46,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:07:46,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464119466] [2021-11-12 23:07:46,938 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:46,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:07:46,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:07:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:07:46,940 INFO L87 Difference]: Start difference. First operand 566 states and 915 transitions. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:07:48,971 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 23:07:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:51,750 INFO L93 Difference]: Finished difference Result 2221 states and 3678 transitions. [2021-11-12 23:07:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:07:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 75 [2021-11-12 23:07:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:51,775 INFO L225 Difference]: With dead ends: 2221 [2021-11-12 23:07:51,775 INFO L226 Difference]: Without dead ends: 1673 [2021-11-12 23:07:51,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:07:51,783 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 1921 mSDsluCounter, 7208 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 162 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4164.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 8416 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.10ms SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4555.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:51,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1942 Valid, 8416 Invalid, 1774 Unknown, 0 Unchecked, 31.10ms Time], IncrementalHoareTripleChecker [162 Valid, 1611 Invalid, 1 Unknown, 0 Unchecked, 4555.37ms Time] [2021-11-12 23:07:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-11-12 23:07:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1655. [2021-11-12 23:07:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1275 states have (on average 1.6047058823529412) internal successors, (2046), 1329 states have internal predecessors, (2046), 306 states have call successors, (306), 75 states have call predecessors, (306), 73 states have return successors, (325), 292 states have call predecessors, (325), 301 states have call successors, (325) [2021-11-12 23:07:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2677 transitions. [2021-11-12 23:07:51,864 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2677 transitions. Word has length 75 [2021-11-12 23:07:51,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:51,865 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 2677 transitions. [2021-11-12 23:07:51,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 8 states have internal predecessors, (90), 6 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-12 23:07:51,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2677 transitions. [2021-11-12 23:07:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 23:07:51,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:51,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:51,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:52,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:52,086 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:52,087 INFO L85 PathProgramCache]: Analyzing trace with hash 461032549, now seen corresponding path program 1 times [2021-11-12 23:07:52,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:52,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864741517] [2021-11-12 23:07:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:52,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:52,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:52,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:52,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:07:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:52,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:07:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:52,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:07:52,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:52,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864741517] [2021-11-12 23:07:52,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864741517] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:07:52,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:07:52,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 23:07:52,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412005212] [2021-11-12 23:07:52,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:52,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:07:52,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:07:52,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:07:52,999 INFO L87 Difference]: Start difference. First operand 1655 states and 2677 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:07:55,018 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 23:07:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:07:55,958 INFO L93 Difference]: Finished difference Result 4438 states and 7315 transitions. [2021-11-12 23:07:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:07:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 75 [2021-11-12 23:07:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:07:55,988 INFO L225 Difference]: With dead ends: 4438 [2021-11-12 23:07:55,988 INFO L226 Difference]: Without dead ends: 2801 [2021-11-12 23:07:56,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:07:56,003 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 878 mSDsluCounter, 3894 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2664.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 5068 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.37ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2788.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:07:56,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 5068 Invalid, 283 Unknown, 0 Unchecked, 14.37ms Time], IncrementalHoareTripleChecker [30 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2788.74ms Time] [2021-11-12 23:07:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-11-12 23:07:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2783. [2021-11-12 23:07:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2150 states have (on average 1.613953488372093) internal successors, (3470), 2238 states have internal predecessors, (3470), 505 states have call successors, (505), 122 states have call predecessors, (505), 127 states have return successors, (587), 493 states have call predecessors, (587), 498 states have call successors, (587) [2021-11-12 23:07:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 4562 transitions. [2021-11-12 23:07:56,172 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 4562 transitions. Word has length 75 [2021-11-12 23:07:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:07:56,173 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 4562 transitions. [2021-11-12 23:07:56,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 23:07:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 4562 transitions. [2021-11-12 23:07:56,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:07:56,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:07:56,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:07:56,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:07:56,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:07:56,389 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:07:56,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:07:56,390 INFO L85 PathProgramCache]: Analyzing trace with hash -13813102, now seen corresponding path program 1 times [2021-11-12 23:07:56,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:07:56,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810661474] [2021-11-12 23:07:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:07:56,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:07:56,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:07:56,391 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:07:56,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:07:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:07:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:07:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:07:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:07:57,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:07:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:07:57,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:07:57,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810661474] [2021-11-12 23:07:57,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810661474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:07:57,328 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:07:57,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:07:57,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006176644] [2021-11-12 23:07:57,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:07:57,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:07:57,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:07:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:07:57,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:07:57,330 INFO L87 Difference]: Start difference. First operand 2783 states and 4562 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:07:59,360 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 23:08:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:00,940 INFO L93 Difference]: Finished difference Result 8648 states and 14970 transitions. [2021-11-12 23:08:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 78 [2021-11-12 23:08:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:01,005 INFO L225 Difference]: With dead ends: 8648 [2021-11-12 23:08:01,006 INFO L226 Difference]: Without dead ends: 5883 [2021-11-12 23:08:01,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:01,033 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 992 mSDsluCounter, 4073 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3146.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1019 SdHoareTripleChecker+Valid, 5251 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.49ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3300.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:01,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1019 Valid, 5251 Invalid, 457 Unknown, 0 Unchecked, 17.49ms Time], IncrementalHoareTripleChecker [49 Valid, 407 Invalid, 1 Unknown, 0 Unchecked, 3300.79ms Time] [2021-11-12 23:08:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2021-11-12 23:08:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 5495. [2021-11-12 23:08:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5495 states, 4247 states have (on average 1.6034848128090418) internal successors, (6810), 4416 states have internal predecessors, (6810), 980 states have call successors, (980), 241 states have call predecessors, (980), 267 states have return successors, (1443), 979 states have call predecessors, (1443), 968 states have call successors, (1443) [2021-11-12 23:08:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5495 states to 5495 states and 9233 transitions. [2021-11-12 23:08:01,427 INFO L78 Accepts]: Start accepts. Automaton has 5495 states and 9233 transitions. Word has length 78 [2021-11-12 23:08:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:01,427 INFO L470 AbstractCegarLoop]: Abstraction has 5495 states and 9233 transitions. [2021-11-12 23:08:01,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 6 states have internal predecessors, (88), 3 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:08:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5495 states and 9233 transitions. [2021-11-12 23:08:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 23:08:01,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:01,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:01,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:01,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:01,646 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1593721713, now seen corresponding path program 1 times [2021-11-12 23:08:01,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:01,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107140095] [2021-11-12 23:08:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:01,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:01,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:01,648 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:01,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:08:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:02,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:02,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 23:08:02,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:02,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107140095] [2021-11-12 23:08:02,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107140095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:02,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:02,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:08:02,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160039531] [2021-11-12 23:08:02,511 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:02,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:02,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:02,512 INFO L87 Difference]: Start difference. First operand 5495 states and 9233 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:08:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:02,861 INFO L93 Difference]: Finished difference Result 11002 states and 18721 transitions. [2021-11-12 23:08:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 79 [2021-11-12 23:08:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:02,919 INFO L225 Difference]: With dead ends: 11002 [2021-11-12 23:08:02,919 INFO L226 Difference]: Without dead ends: 5525 [2021-11-12 23:08:03,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 23:08:03,013 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 19 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3532 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.52ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:03,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3532 Invalid, 100 Unknown, 0 Unchecked, 5.52ms Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 120.86ms Time] [2021-11-12 23:08:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-11-12 23:08:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5515. [2021-11-12 23:08:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5515 states, 4262 states have (on average 1.6001877053026747) internal successors, (6820), 4431 states have internal predecessors, (6820), 980 states have call successors, (980), 251 states have call predecessors, (980), 272 states have return successors, (1418), 974 states have call predecessors, (1418), 968 states have call successors, (1418) [2021-11-12 23:08:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5515 states to 5515 states and 9218 transitions. [2021-11-12 23:08:03,311 INFO L78 Accepts]: Start accepts. Automaton has 5515 states and 9218 transitions. Word has length 79 [2021-11-12 23:08:03,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:03,311 INFO L470 AbstractCegarLoop]: Abstraction has 5515 states and 9218 transitions. [2021-11-12 23:08:03,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 23:08:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states and 9218 transitions. [2021-11-12 23:08:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:08:03,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:03,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:03,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:03,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:03,538 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -650455551, now seen corresponding path program 1 times [2021-11-12 23:08:03,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:03,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869898914] [2021-11-12 23:08:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:03,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:03,540 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:03,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:08:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:03,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:08:03,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 23:08:04,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 23:08:04,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:04,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869898914] [2021-11-12 23:08:04,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869898914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:04,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:04,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:08:04,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250605296] [2021-11-12 23:08:04,484 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:04,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:04,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:04,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:04,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:04,485 INFO L87 Difference]: Start difference. First operand 5515 states and 9218 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:08:06,505 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 23:08:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:08,708 INFO L93 Difference]: Finished difference Result 17331 states and 31294 transitions. [2021-11-12 23:08:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 87 [2021-11-12 23:08:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:08,820 INFO L225 Difference]: With dead ends: 17331 [2021-11-12 23:08:08,820 INFO L226 Difference]: Without dead ends: 11834 [2021-11-12 23:08:08,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:08,857 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 973 mSDsluCounter, 4808 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3464.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 5991 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.58ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3670.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:08,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 5991 Invalid, 719 Unknown, 0 Unchecked, 18.58ms Time], IncrementalHoareTripleChecker [42 Valid, 676 Invalid, 1 Unknown, 0 Unchecked, 3670.35ms Time] [2021-11-12 23:08:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11834 states. [2021-11-12 23:08:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11834 to 11014. [2021-11-12 23:08:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 8511 states have (on average 1.5929972976148514) internal successors, (13558), 8847 states have internal predecessors, (13558), 1935 states have call successors, (1935), 499 states have call predecessors, (1935), 567 states have return successors, (3601), 1951 states have call predecessors, (3601), 1913 states have call successors, (3601) [2021-11-12 23:08:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 19094 transitions. [2021-11-12 23:08:09,568 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 19094 transitions. Word has length 87 [2021-11-12 23:08:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:09,569 INFO L470 AbstractCegarLoop]: Abstraction has 11014 states and 19094 transitions. [2021-11-12 23:08:09,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (21), 3 states have call predecessors, (21), 5 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:08:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 19094 transitions. [2021-11-12 23:08:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 23:08:09,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:09,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:09,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:09,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:09,790 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1775026134, now seen corresponding path program 1 times [2021-11-12 23:08:09,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:09,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159511076] [2021-11-12 23:08:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:09,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:09,792 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:09,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:08:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:08:10,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:08:10,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:10,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159511076] [2021-11-12 23:08:10,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159511076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:10,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:10,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:08:10,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043335626] [2021-11-12 23:08:10,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:10,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:10,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:10,519 INFO L87 Difference]: Start difference. First operand 11014 states and 19094 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:08:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:11,093 INFO L93 Difference]: Finished difference Result 22130 states and 38972 transitions. [2021-11-12 23:08:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 88 [2021-11-12 23:08:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:11,184 INFO L225 Difference]: With dead ends: 22130 [2021-11-12 23:08:11,184 INFO L226 Difference]: Without dead ends: 11134 [2021-11-12 23:08:11,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 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 23:08:11,259 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 34 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.39ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.99ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:11,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1772 Invalid, 69 Unknown, 0 Unchecked, 3.39ms Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 74.99ms Time] [2021-11-12 23:08:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11134 states. [2021-11-12 23:08:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11134 to 11114. [2021-11-12 23:08:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 8601 states have (on average 1.5879548889663992) internal successors, (13658), 8917 states have internal predecessors, (13658), 1935 states have call successors, (1935), 539 states have call predecessors, (1935), 577 states have return successors, (3563), 1941 states have call predecessors, (3563), 1913 states have call successors, (3563) [2021-11-12 23:08:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 19156 transitions. [2021-11-12 23:08:12,023 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 19156 transitions. Word has length 88 [2021-11-12 23:08:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:12,024 INFO L470 AbstractCegarLoop]: Abstraction has 11114 states and 19156 transitions. [2021-11-12 23:08:12,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 23:08:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 19156 transitions. [2021-11-12 23:08:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-12 23:08:12,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:12,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-12 23:08:12,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:08:12,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:12,244 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1227574607, now seen corresponding path program 1 times [2021-11-12 23:08:12,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:12,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514718363] [2021-11-12 23:08:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:12,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:12,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:12,248 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:12,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:08:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:08:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:08:12,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:08:13,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:13,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514718363] [2021-11-12 23:08:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514718363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:13,215 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:13,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:08:13,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849567290] [2021-11-12 23:08:13,215 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:13,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:13,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:13,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:13,217 INFO L87 Difference]: Start difference. First operand 11114 states and 19156 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:08:15,250 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 23:08:17,258 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 23:08:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:19,245 INFO L93 Difference]: Finished difference Result 34877 states and 67333 transitions. [2021-11-12 23:08:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 97 [2021-11-12 23:08:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:19,630 INFO L225 Difference]: With dead ends: 34877 [2021-11-12 23:08:19,631 INFO L226 Difference]: Without dead ends: 23781 [2021-11-12 23:08:19,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:19,726 INFO L933 BasicCegarLoop]: 1209 mSDtfsCounter, 951 mSDsluCounter, 4190 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4926.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 5399 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.16ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5089.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:19,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 5399 Invalid, 433 Unknown, 0 Unchecked, 18.16ms Time], IncrementalHoareTripleChecker [41 Valid, 390 Invalid, 2 Unknown, 0 Unchecked, 5089.65ms Time] [2021-11-12 23:08:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23781 states. [2021-11-12 23:08:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23781 to 22297. [2021-11-12 23:08:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22297 states, 17249 states have (on average 1.5814829845208418) internal successors, (27279), 17889 states have internal predecessors, (27279), 3850 states have call successors, (3850), 1075 states have call predecessors, (3850), 1197 states have return successors, (9456), 3900 states have call predecessors, (9456), 3808 states have call successors, (9456) [2021-11-12 23:08:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22297 states to 22297 states and 40585 transitions. [2021-11-12 23:08:21,413 INFO L78 Accepts]: Start accepts. Automaton has 22297 states and 40585 transitions. Word has length 97 [2021-11-12 23:08:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:21,414 INFO L470 AbstractCegarLoop]: Abstraction has 22297 states and 40585 transitions. [2021-11-12 23:08:21,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:08:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 22297 states and 40585 transitions. [2021-11-12 23:08:21,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-12 23:08:21,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:21,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 23:08:21,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:21,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:21,634 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash -203367196, now seen corresponding path program 1 times [2021-11-12 23:08:21,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:21,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050659352] [2021-11-12 23:08:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:21,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:21,638 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:21,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:08:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:22,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:08:22,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:08:22,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 23:08:22,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:22,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050659352] [2021-11-12 23:08:22,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050659352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:22,592 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:22,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:08:22,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288989184] [2021-11-12 23:08:22,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:22,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:22,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:22,594 INFO L87 Difference]: Start difference. First operand 22297 states and 40585 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:08:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:23,616 INFO L93 Difference]: Finished difference Result 44816 states and 83448 transitions. [2021-11-12 23:08:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2021-11-12 23:08:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:23,820 INFO L225 Difference]: With dead ends: 44816 [2021-11-12 23:08:23,820 INFO L226 Difference]: Without dead ends: 22537 [2021-11-12 23:08:24,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 192 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 23:08:24,387 INFO L933 BasicCegarLoop]: 892 mSDtfsCounter, 21 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3530 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.53ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:24,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3530 Invalid, 95 Unknown, 0 Unchecked, 3.53ms Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 91.42ms Time] [2021-11-12 23:08:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22537 states. [2021-11-12 23:08:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22537 to 22497. [2021-11-12 23:08:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22497 states, 17429 states have (on average 1.57662516495496) internal successors, (27479), 18069 states have internal predecessors, (27479), 3850 states have call successors, (3850), 1115 states have call predecessors, (3850), 1217 states have return successors, (9404), 3880 states have call predecessors, (9404), 3808 states have call successors, (9404) [2021-11-12 23:08:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22497 states to 22497 states and 40733 transitions. [2021-11-12 23:08:25,715 INFO L78 Accepts]: Start accepts. Automaton has 22497 states and 40733 transitions. Word has length 98 [2021-11-12 23:08:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:25,715 INFO L470 AbstractCegarLoop]: Abstraction has 22497 states and 40733 transitions. [2021-11-12 23:08:25,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:08:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 22497 states and 40733 transitions. [2021-11-12 23:08:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:08:25,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:25,718 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:25,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:08:25,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:25,935 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash 770009700, now seen corresponding path program 1 times [2021-11-12 23:08:25,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:25,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266483779] [2021-11-12 23:08:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:25,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:25,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:25,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:08:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:26,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:08:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:08:26,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:08:27,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:27,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266483779] [2021-11-12 23:08:27,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266483779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:27,115 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:27,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:08:27,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201137693] [2021-11-12 23:08:27,115 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:27,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:08:27,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:08:27,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:27,117 INFO L87 Difference]: Start difference. First operand 22497 states and 40733 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:08:29,147 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 23:08:31,153 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 23:08:34,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:34,752 INFO L93 Difference]: Finished difference Result 70371 states and 151123 transitions. [2021-11-12 23:08:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:08:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 108 [2021-11-12 23:08:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:35,403 INFO L225 Difference]: With dead ends: 70371 [2021-11-12 23:08:35,403 INFO L226 Difference]: Without dead ends: 47892 [2021-11-12 23:08:35,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:08:35,664 INFO L933 BasicCegarLoop]: 1180 mSDtfsCounter, 949 mSDsluCounter, 4810 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5296.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 5990 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.63ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5482.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:35,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 5990 Invalid, 686 Unknown, 0 Unchecked, 12.63ms Time], IncrementalHoareTripleChecker [42 Valid, 642 Invalid, 2 Unknown, 0 Unchecked, 5482.58ms Time] [2021-11-12 23:08:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47892 states. [2021-11-12 23:08:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47892 to 45208. [2021-11-12 23:08:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45208 states, 35005 states have (on average 1.5709755749178689) internal successors, (54992), 36313 states have internal predecessors, (54992), 7685 states have call successors, (7685), 2227 states have call predecessors, (7685), 2517 states have return successors, (26377), 7803 states have call predecessors, (26377), 7603 states have call successors, (26377) [2021-11-12 23:08:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45208 states to 45208 states and 89054 transitions. [2021-11-12 23:08:38,828 INFO L78 Accepts]: Start accepts. Automaton has 45208 states and 89054 transitions. Word has length 108 [2021-11-12 23:08:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:38,829 INFO L470 AbstractCegarLoop]: Abstraction has 45208 states and 89054 transitions. [2021-11-12 23:08:38,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 6 states have internal predecessors, (111), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 23:08:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 45208 states and 89054 transitions. [2021-11-12 23:08:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:08:38,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:38,830 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:39,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:39,031 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -857755087, now seen corresponding path program 1 times [2021-11-12 23:08:39,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:39,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502523141] [2021-11-12 23:08:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:39,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:39,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-12 23:08:39,054 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:39,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:08:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:08:39,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:08:40,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:08:40,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:40,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502523141] [2021-11-12 23:08:40,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502523141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:40,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:40,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 23:08:40,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789680816] [2021-11-12 23:08:40,447 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:40,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:08:40,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:40,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:08:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:08:40,449 INFO L87 Difference]: Start difference. First operand 45208 states and 89054 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:08:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:45,850 INFO L93 Difference]: Finished difference Result 136633 states and 270193 transitions. [2021-11-12 23:08:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:08:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 109 [2021-11-12 23:08:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:47,083 INFO L225 Difference]: With dead ends: 136633 [2021-11-12 23:08:47,084 INFO L226 Difference]: Without dead ends: 92572 [2021-11-12 23:08:47,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:08:47,531 INFO L933 BasicCegarLoop]: 1280 mSDtfsCounter, 1649 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 777.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.33ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 918.08ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:47,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 3707 Invalid, 304 Unknown, 0 Unchecked, 8.33ms Time], IncrementalHoareTripleChecker [15 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 918.08ms Time] [2021-11-12 23:08:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92572 states. [2021-11-12 23:08:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92572 to 87139. [2021-11-12 23:08:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87139 states, 68219 states have (on average 1.5688884328412906) internal successors, (107028), 70033 states have internal predecessors, (107028), 14197 states have call successors, (14197), 4295 states have call predecessors, (14197), 4722 states have return successors, (52382), 14014 states have call predecessors, (52382), 14030 states have call successors, (52382) [2021-11-12 23:08:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87139 states to 87139 states and 173607 transitions. [2021-11-12 23:08:53,292 INFO L78 Accepts]: Start accepts. Automaton has 87139 states and 173607 transitions. Word has length 109 [2021-11-12 23:08:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:53,293 INFO L470 AbstractCegarLoop]: Abstraction has 87139 states and 173607 transitions. [2021-11-12 23:08:53,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 4 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 23:08:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 87139 states and 173607 transitions. [2021-11-12 23:08:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:08:53,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:53,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:53,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-12 23:08:53,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:08:53,514 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:53,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1809307139, now seen corresponding path program 1 times [2021-11-12 23:08:53,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:08:53,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541190863] [2021-11-12 23:08:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:53,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:08:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:08:53,517 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:08:53,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1f00b5e-5b12-4c4d-873e-4f0b6611fe95/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:08:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:54,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:08:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:08:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:08:54,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:08:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 23:08:55,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:08:55,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541190863] [2021-11-12 23:08:55,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541190863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:55,312 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:55,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:08:55,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997586790] [2021-11-12 23:08:55,313 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:55,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:08:55,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:08:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:08:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:08:55,315 INFO L87 Difference]: Start difference. First operand 87139 states and 173607 transitions. Second operand has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 states have internal predecessors, (176), 7 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:08:57,338 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 23:08:59,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:09:01,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []