./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:10,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:10,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:10,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:10,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:10,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:10,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:10,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:10,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:10,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:10,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:10,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:10,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:10,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:10,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:10,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:10,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:10,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:10,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:10,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:10,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:10,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:10,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:10,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:10,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:10,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:10,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:11,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:11,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:11,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:11,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:11,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:11,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:11,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:11,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:11,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:11,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:11,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:11,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:11,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:11,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:11,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:23:11,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:11,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:11,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:11,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:11,057 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:11,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:11,057 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:11,058 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:23:11,064 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:11,064 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:11,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:23:11,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:23:11,066 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:11,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:23:11,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:23:11,066 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:23:11,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:11,067 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:11,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:23:11,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:11,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:11,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:11,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:11,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:11,068 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:11,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:11,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:11,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:11,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:11,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:11,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:11,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:11,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:11,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:11,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:11,072 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:23:11,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:23:11,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:11,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:11,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:11,073 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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 [2021-11-12 23:23:11,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:11,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:11,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:11,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:11,360 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:11,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-12 23:23:11,426 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/0fe5eaf9a/b5797e93ca8a4175bb692be8558fd4f8/FLAG9a4e633a3 [2021-11-12 23:23:12,133 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:12,133 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-12 23:23:12,156 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/0fe5eaf9a/b5797e93ca8a4175bb692be8558fd4f8/FLAG9a4e633a3 [2021-11-12 23:23:12,296 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/0fe5eaf9a/b5797e93ca8a4175bb692be8558fd4f8 [2021-11-12 23:23:12,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:12,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:12,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:12,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:12,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:12,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:12" (1/1) ... [2021-11-12 23:23:12,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32736420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:12, skipping insertion in model container [2021-11-12 23:23:12,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:12" (1/1) ... [2021-11-12 23:23:12,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:12,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:12,949 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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-12 23:23:13,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:13,018 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 23:23:13,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53bdccda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:13, skipping insertion in model container [2021-11-12 23:23:13,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:13,020 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:23:13,022 INFO L158 Benchmark]: Toolchain (without parser) took 717.76ms. Allocated memory is still 109.1MB. Free memory was 64.4MB in the beginning and 70.4MB in the end (delta: -6.0MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-11-12 23:23:13,023 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:13,024 INFO L158 Benchmark]: CACSL2BoogieTranslator took 712.44ms. Allocated memory is still 109.1MB. Free memory was 64.3MB in the beginning and 70.4MB in the end (delta: -6.1MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-11-12 23:23:13,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 712.44ms. Allocated memory is still 109.1MB. Free memory was 64.3MB in the beginning and 70.4MB in the end (delta: -6.1MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3042]: 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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:15,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:15,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:15,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:15,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:15,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:15,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:15,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:15,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:15,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:15,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:15,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:15,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:15,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:15,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:15,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:15,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:15,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:15,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:15,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:15,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:15,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:15,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:15,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:15,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:15,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:15,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:15,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:15,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:15,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:15,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:15,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:15,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:15,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:15,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:15,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:15,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:15,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:15,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:15,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:15,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:15,379 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:23:15,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:15,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:15,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:15,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:15,412 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:15,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:15,413 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:15,413 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:15,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:15,413 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:15,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:15,414 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:15,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:15,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:15,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:15,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:15,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:15,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:15,416 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:23:15,416 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:23:15,416 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:15,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:15,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:15,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:15,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:15,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:23:15,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:15,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:15,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:15,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:15,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:15,418 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:23:15,418 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:15,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:15,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:15,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:15,419 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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c2801af81eeb5fcd439b1a1907444cd22ba07dc03ae6cb195ad73614e32dad5 [2021-11-12 23:23:15,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:15,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:15,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:15,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:15,832 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:15,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-12 23:23:15,916 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/212070126/acc0e660fe2541d48f16d237aa76f34e/FLAGf24dfd57e [2021-11-12 23:23:16,631 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:16,632 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c [2021-11-12 23:23:16,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/212070126/acc0e660fe2541d48f16d237aa76f34e/FLAGf24dfd57e [2021-11-12 23:23:16,906 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/data/212070126/acc0e660fe2541d48f16d237aa76f34e [2021-11-12 23:23:16,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:16,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:16,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:16,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:16,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:16,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:16" (1/1) ... [2021-11-12 23:23:16,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cab9f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:16, skipping insertion in model container [2021-11-12 23:23:16,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:16" (1/1) ... [2021-11-12 23:23:16,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:17,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:17,442 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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-12 23:23:17,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:17,514 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:23:17,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:17,655 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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-12 23:23:17,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:17,691 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:23:17,846 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_b83a03bb-1487-45b8-9ace-c4f0e15c688e/sv-benchmarks/c/product-lines/elevator_spec3_product21.cil.c[62420,62433] [2021-11-12 23:23:17,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:17,921 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:23:17,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17 WrapperNode [2021-11-12 23:23:17,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:17,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:17,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:23:17,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:23:17,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:18,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:23:18,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:23:18,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:23:18,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:23:18,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:23:18,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:23:18,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:23:18,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (1/1) ... [2021-11-12 23:23:18,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:18,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:18,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:23:18,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:23:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 23:23:18,266 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 23:23:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:23:18,266 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:23:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:23:18,266 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:23:18,266 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:23:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:23:18,267 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:23:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:23:18,267 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:23:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:23:18,267 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:23:18,267 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:23:18,268 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:23:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:23:18,268 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:23:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:23:18,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:23:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:23:18,268 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:23:18,268 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:23:18,269 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:23:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:23:18,269 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:23:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:23:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:23:18,269 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:23:18,269 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 23:23:18,269 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 23:23:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:23:18,270 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:23:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 23:23:18,270 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 23:23:18,270 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:23:18,270 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:23:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:23:18,271 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:23:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:23:18,271 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:23:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:23:18,271 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:23:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:23:18,272 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:23:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:23:18,272 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:23:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:23:18,272 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:23:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:23:18,273 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:23:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:23:18,273 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:23:18,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:23:18,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:23:18,289 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:23:18,290 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:23:22,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:23:22,175 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:23:22,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:22 BoogieIcfgContainer [2021-11-12 23:23:22,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:23:22,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:23:22,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:23:22,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:23:22,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:23:16" (1/3) ... [2021-11-12 23:23:22,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e9c124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:22, skipping insertion in model container [2021-11-12 23:23:22,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:17" (2/3) ... [2021-11-12 23:23:22,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e9c124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:22, skipping insertion in model container [2021-11-12 23:23:22,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:22" (3/3) ... [2021-11-12 23:23:22,186 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product21.cil.c [2021-11-12 23:23:22,191 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:23:22,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:23:22,243 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:23:22,250 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:23:22,250 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:23:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 588 states, 454 states have (on average 1.6762114537444934) internal successors, (761), 472 states have internal predecessors, (761), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-12 23:23:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-12 23:23:22,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:22,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:22,344 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash -803811748, now seen corresponding path program 1 times [2021-11-12 23:23:22,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:22,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111954594] [2021-11-12 23:23:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:22,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:22,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:22,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:22,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:23:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:23:23,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:23,444 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 23:23:23,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:23,880 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 23:23:23,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:23,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111954594] [2021-11-12 23:23:23,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111954594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:23,882 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:23,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:23,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835846163] [2021-11-12 23:23:23,885 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:23,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:23,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:23,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:23,928 INFO L87 Difference]: Start difference. First operand has 588 states, 454 states have (on average 1.6762114537444934) internal successors, (761), 472 states have internal predecessors, (761), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:24,331 INFO L93 Difference]: Finished difference Result 1179 states and 1967 transitions. [2021-11-12 23:23:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:23:24,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 99 [2021-11-12 23:23:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:24,355 INFO L225 Difference]: With dead ends: 1179 [2021-11-12 23:23:24,355 INFO L226 Difference]: Without dead ends: 599 [2021-11-12 23:23:24,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 187 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 23:23:24,375 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 119 mSDsluCounter, 6502 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 7456 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.90ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.02ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:24,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 7456 Invalid, 116 Unknown, 0 Unchecked, 36.90ms Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 204.02ms Time] [2021-11-12 23:23:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-12 23:23:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 591. [2021-11-12 23:23:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 457 states have (on average 1.6673960612691465) internal successors, (762), 475 states have internal predecessors, (762), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-12 23:23:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 975 transitions. [2021-11-12 23:23:24,541 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 975 transitions. Word has length 99 [2021-11-12 23:23:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:24,542 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 975 transitions. [2021-11-12 23:23:24,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 975 transitions. [2021-11-12 23:23:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-12 23:23:24,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:24,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:24,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:24,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:24,780 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1606711870, now seen corresponding path program 1 times [2021-11-12 23:23:24,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:24,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135943794] [2021-11-12 23:23:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:24,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:24,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:24,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:23:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:23:25,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:25,651 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 23:23:25,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:26,064 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 23:23:26,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:26,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135943794] [2021-11-12 23:23:26,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135943794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:26,065 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:26,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:26,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280470541] [2021-11-12 23:23:26,066 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:26,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:26,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:26,069 INFO L87 Difference]: Start difference. First operand 591 states and 975 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:26,351 INFO L93 Difference]: Finished difference Result 1187 states and 1968 transitions. [2021-11-12 23:23:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:23:26,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 100 [2021-11-12 23:23:26,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:26,359 INFO L225 Difference]: With dead ends: 1187 [2021-11-12 23:23:26,359 INFO L226 Difference]: Without dead ends: 612 [2021-11-12 23:23:26,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 189 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 23:23:26,366 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 175 mSDsluCounter, 5622 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 6579 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.23ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:26,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 6579 Invalid, 111 Unknown, 0 Unchecked, 14.23ms Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 167.28ms Time] [2021-11-12 23:23:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-12 23:23:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2021-11-12 23:23:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 467 states have (on average 1.6638115631691648) internal successors, (777), 487 states have internal predecessors, (777), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-12 23:23:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 994 transitions. [2021-11-12 23:23:26,409 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 994 transitions. Word has length 100 [2021-11-12 23:23:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:26,409 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 994 transitions. [2021-11-12 23:23:26,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 994 transitions. [2021-11-12 23:23:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:23:26,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:26,415 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:26,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:26,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:26,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -765839552, now seen corresponding path program 1 times [2021-11-12 23:23:26,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:26,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032663699] [2021-11-12 23:23:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:26,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:26,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:26,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:26,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:23:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:23:27,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:27,435 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 23:23:27,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:27,884 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 23:23:27,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:27,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032663699] [2021-11-12 23:23:27,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032663699] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:27,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:27,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:23:27,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748772156] [2021-11-12 23:23:27,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:27,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:23:27,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:27,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:23:27,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:23:27,893 INFO L87 Difference]: Start difference. First operand 604 states and 994 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:28,156 INFO L93 Difference]: Finished difference Result 1213 states and 2007 transitions. [2021-11-12 23:23:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:23:28,157 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 101 [2021-11-12 23:23:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:28,164 INFO L225 Difference]: With dead ends: 1213 [2021-11-12 23:23:28,165 INFO L226 Difference]: Without dead ends: 625 [2021-11-12 23:23:28,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 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 23:23:28,174 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 174 mSDsluCounter, 5610 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 6566 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:28,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 6566 Invalid, 116 Unknown, 0 Unchecked, 15.44ms Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 176.69ms Time] [2021-11-12 23:23:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-12 23:23:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 617. [2021-11-12 23:23:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 477 states have (on average 1.6603773584905661) internal successors, (792), 499 states have internal predecessors, (792), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-12 23:23:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1013 transitions. [2021-11-12 23:23:28,219 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1013 transitions. Word has length 101 [2021-11-12 23:23:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:28,220 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1013 transitions. [2021-11-12 23:23:28,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1013 transitions. [2021-11-12 23:23:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 23:23:28,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:28,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:28,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:28,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:28,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:28,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1688216345, now seen corresponding path program 1 times [2021-11-12 23:23:28,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:28,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787877186] [2021-11-12 23:23:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:28,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:28,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:28,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:23:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:23:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:29,233 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 23:23:29,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:29,604 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 23:23:29,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:29,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787877186] [2021-11-12 23:23:29,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787877186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:29,604 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:29,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:23:29,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448652082] [2021-11-12 23:23:29,605 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:29,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:23:29,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:23:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:23:29,606 INFO L87 Difference]: Start difference. First operand 617 states and 1013 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:23:29,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:29,829 INFO L93 Difference]: Finished difference Result 1233 states and 2037 transitions. [2021-11-12 23:23:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 102 [2021-11-12 23:23:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:29,836 INFO L225 Difference]: With dead ends: 1233 [2021-11-12 23:23:29,836 INFO L226 Difference]: Without dead ends: 632 [2021-11-12 23:23:29,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 196 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 23:23:29,842 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 150 mSDsluCounter, 5458 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.29ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:29,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 6402 Invalid, 85 Unknown, 0 Unchecked, 13.29ms Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 128.29ms Time] [2021-11-12 23:23:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-12 23:23:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 630. [2021-11-12 23:23:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 487 states have (on average 1.6570841889117043) internal successors, (807), 511 states have internal predecessors, (807), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (118), 105 states have call predecessors, (118), 107 states have call successors, (118) [2021-11-12 23:23:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1035 transitions. [2021-11-12 23:23:29,876 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1035 transitions. Word has length 102 [2021-11-12 23:23:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:29,877 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1035 transitions. [2021-11-12 23:23:29,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-12 23:23:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1035 transitions. [2021-11-12 23:23:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:23:29,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:29,882 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:29,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:30,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:30,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1132068828, now seen corresponding path program 1 times [2021-11-12 23:23:30,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:30,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144295161] [2021-11-12 23:23:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:30,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:30,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:30,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:23:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:30,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:30,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:30,947 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 23:23:30,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:31,426 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 23:23:31,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:31,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144295161] [2021-11-12 23:23:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144295161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:31,426 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:31,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:23:31,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455006023] [2021-11-12 23:23:31,427 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:31,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:23:31,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:23:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:23:31,428 INFO L87 Difference]: Start difference. First operand 630 states and 1035 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:31,829 INFO L93 Difference]: Finished difference Result 1256 states and 2073 transitions. [2021-11-12 23:23:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:23:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 103 [2021-11-12 23:23:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:31,836 INFO L225 Difference]: With dead ends: 1256 [2021-11-12 23:23:31,837 INFO L226 Difference]: Without dead ends: 636 [2021-11-12 23:23:31,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 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 23:23:31,843 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 138 mSDsluCounter, 8251 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 9184 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.80ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:31,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 9184 Invalid, 226 Unknown, 0 Unchecked, 17.80ms Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 278.32ms Time] [2021-11-12 23:23:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-12 23:23:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 626. [2021-11-12 23:23:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 483 states have (on average 1.6480331262939958) internal successors, (796), 507 states have internal predecessors, (796), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (118), 105 states have call predecessors, (118), 107 states have call successors, (118) [2021-11-12 23:23:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1024 transitions. [2021-11-12 23:23:31,877 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1024 transitions. Word has length 103 [2021-11-12 23:23:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:31,878 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1024 transitions. [2021-11-12 23:23:31,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1024 transitions. [2021-11-12 23:23:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:23:31,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:31,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:31,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:32,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:32,104 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash 264239188, now seen corresponding path program 1 times [2021-11-12 23:23:32,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:32,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598685567] [2021-11-12 23:23:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:32,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:32,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:32,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:32,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:23:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:32,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:32,947 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 23:23:32,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:33,208 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 23:23:33,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:33,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598685567] [2021-11-12 23:23:33,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598685567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:33,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:33,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:23:33,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019193812] [2021-11-12 23:23:33,209 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:33,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:23:33,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:23:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:23:33,211 INFO L87 Difference]: Start difference. First operand 626 states and 1024 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 23:23:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:33,279 INFO L93 Difference]: Finished difference Result 1228 states and 2014 transitions. [2021-11-12 23:23:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:23:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 103 [2021-11-12 23:23:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:33,285 INFO L225 Difference]: With dead ends: 1228 [2021-11-12 23:23:33,285 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 23:23:33,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 201 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 23:23:33,294 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 32 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:33,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1885 Invalid, 17 Unknown, 0 Unchecked, 3.32ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 21.76ms Time] [2021-11-12 23:23:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 23:23:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 23:23:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.631578947368421) internal successors, (682), 434 states have internal predecessors, (682), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:23:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 891 transitions. [2021-11-12 23:23:33,322 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 891 transitions. Word has length 103 [2021-11-12 23:23:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:33,323 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 891 transitions. [2021-11-12 23:23:33,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 23:23:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 891 transitions. [2021-11-12 23:23:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:23:33,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:33,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:33,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:33,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:33,548 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash 92359238, now seen corresponding path program 1 times [2021-11-12 23:23:33,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:33,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237015660] [2021-11-12 23:23:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:33,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:33,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:33,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:33,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:23:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:34,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:34,357 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 23:23:34,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:34,820 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 23:23:34,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:34,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237015660] [2021-11-12 23:23:34,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237015660] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:34,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:34,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:23:34,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636935266] [2021-11-12 23:23:34,821 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:34,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:23:34,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:34,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:23:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:23:34,823 INFO L87 Difference]: Start difference. First operand 549 states and 891 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:35,033 INFO L93 Difference]: Finished difference Result 1085 states and 1770 transitions. [2021-11-12 23:23:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:23:35,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 104 [2021-11-12 23:23:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:35,039 INFO L225 Difference]: With dead ends: 1085 [2021-11-12 23:23:35,039 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 23:23:35,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 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 23:23:35,044 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 75 mSDsluCounter, 6961 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 7835 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:35,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 7835 Invalid, 130 Unknown, 0 Unchecked, 11.92ms Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 127.19ms Time] [2021-11-12 23:23:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 23:23:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 23:23:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.6291866028708133) internal successors, (681), 434 states have internal predecessors, (681), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:23:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 890 transitions. [2021-11-12 23:23:35,071 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 890 transitions. Word has length 104 [2021-11-12 23:23:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:35,071 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 890 transitions. [2021-11-12 23:23:35,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 890 transitions. [2021-11-12 23:23:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-12 23:23:35,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:35,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:35,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:35,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:35,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1271514281, now seen corresponding path program 1 times [2021-11-12 23:23:35,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:35,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356184241] [2021-11-12 23:23:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:35,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:35,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:35,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:23:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:35,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:35,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:36,080 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 23:23:36,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:36,510 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 23:23:36,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:36,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356184241] [2021-11-12 23:23:36,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356184241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:36,511 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:36,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:23:36,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176110421] [2021-11-12 23:23:36,512 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:36,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:23:36,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:36,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:23:36,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:23:36,513 INFO L87 Difference]: Start difference. First operand 549 states and 890 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:36,677 INFO L93 Difference]: Finished difference Result 1085 states and 1768 transitions. [2021-11-12 23:23:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:23:36,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 105 [2021-11-12 23:23:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:36,683 INFO L225 Difference]: With dead ends: 1085 [2021-11-12 23:23:36,683 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 23:23:36,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:23:36,714 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 46 mSDsluCounter, 6948 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 7822 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:36,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 7822 Invalid, 112 Unknown, 0 Unchecked, 10.31ms Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 93.57ms Time] [2021-11-12 23:23:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 23:23:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 23:23:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.6267942583732058) internal successors, (680), 434 states have internal predecessors, (680), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:23:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 889 transitions. [2021-11-12 23:23:36,738 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 889 transitions. Word has length 105 [2021-11-12 23:23:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:36,739 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 889 transitions. [2021-11-12 23:23:36,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 889 transitions. [2021-11-12 23:23:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 23:23:36,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:36,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:36,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:36,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:36,964 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1047205611, now seen corresponding path program 1 times [2021-11-12 23:23:36,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:36,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708693130] [2021-11-12 23:23:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:36,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:36,966 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:36,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:23:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:37,701 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 23:23:37,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:38,168 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 23:23:38,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:38,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708693130] [2021-11-12 23:23:38,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708693130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:38,169 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:38,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:23:38,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112300293] [2021-11-12 23:23:38,169 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:38,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:23:38,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:23:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:23:38,171 INFO L87 Difference]: Start difference. First operand 549 states and 889 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:38,326 INFO L93 Difference]: Finished difference Result 1085 states and 1766 transitions. [2021-11-12 23:23:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:23:38,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 106 [2021-11-12 23:23:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:38,334 INFO L225 Difference]: With dead ends: 1085 [2021-11-12 23:23:38,335 INFO L226 Difference]: Without dead ends: 549 [2021-11-12 23:23:38,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 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 23:23:38,342 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 41 mSDsluCounter, 5205 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6079 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.95ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:38,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 6079 Invalid, 82 Unknown, 0 Unchecked, 8.95ms Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 66.62ms Time] [2021-11-12 23:23:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-12 23:23:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-11-12 23:23:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 418 states have (on average 1.624401913875598) internal successors, (679), 434 states have internal predecessors, (679), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-12 23:23:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 888 transitions. [2021-11-12 23:23:38,372 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 888 transitions. Word has length 106 [2021-11-12 23:23:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:38,373 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 888 transitions. [2021-11-12 23:23:38,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 23:23:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 888 transitions. [2021-11-12 23:23:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:23:38,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:38,380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:38,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:38,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:38,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 265194798, now seen corresponding path program 1 times [2021-11-12 23:23:38,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:38,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577377088] [2021-11-12 23:23:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:38,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:38,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:38,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:23:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:39,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:23:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:39,356 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 23:23:39,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:39,635 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 23:23:39,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:39,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577377088] [2021-11-12 23:23:39,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577377088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:39,636 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:39,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 23:23:39,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467783788] [2021-11-12 23:23:39,636 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:39,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:23:39,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:23:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:39,638 INFO L87 Difference]: Start difference. First operand 549 states and 888 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:23:41,667 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 23:23:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:45,251 INFO L93 Difference]: Finished difference Result 2275 states and 3776 transitions. [2021-11-12 23:23:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:23:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) Word has length 107 [2021-11-12 23:23:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:45,266 INFO L225 Difference]: With dead ends: 2275 [2021-11-12 23:23:45,267 INFO L226 Difference]: Without dead ends: 1744 [2021-11-12 23:23:45,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 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 23:23:45,275 INFO L933 BasicCegarLoop]: 1167 mSDtfsCounter, 2595 mSDsluCounter, 6409 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 581 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4858.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2666 SdHoareTripleChecker+Valid, 7576 SdHoareTripleChecker+Invalid, 2697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.31ms SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5332.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:45,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2666 Valid, 7576 Invalid, 2697 Unknown, 0 Unchecked, 41.31ms Time], IncrementalHoareTripleChecker [581 Valid, 2115 Invalid, 1 Unknown, 0 Unchecked, 5332.07ms Time] [2021-11-12 23:23:45,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-11-12 23:23:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1726. [2021-11-12 23:23:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1297 states have (on average 1.5967617579028528) internal successors, (2071), 1360 states have internal predecessors, (2071), 358 states have call successors, (358), 72 states have call predecessors, (358), 70 states have return successors, (375), 343 states have call predecessors, (375), 353 states have call successors, (375) [2021-11-12 23:23:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2804 transitions. [2021-11-12 23:23:45,371 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2804 transitions. Word has length 107 [2021-11-12 23:23:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:45,371 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2804 transitions. [2021-11-12 23:23:45,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 8 states have internal predecessors, (132), 6 states have call successors, (26), 4 states have call predecessors, (26), 6 states have return successors, (24), 8 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-12 23:23:45,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2804 transitions. [2021-11-12 23:23:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:23:45,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:45,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:45,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:45,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:45,591 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2119031275, now seen corresponding path program 1 times [2021-11-12 23:23:45,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:45,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082847782] [2021-11-12 23:23:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:45,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:45,592 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:45,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:23:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:23:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:46,349 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 23:23:46,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:46,670 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 23:23:46,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:46,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082847782] [2021-11-12 23:23:46,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082847782] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:23:46,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:23:46,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 23:23:46,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692625576] [2021-11-12 23:23:46,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:46,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:23:46,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:23:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:23:46,672 INFO L87 Difference]: Start difference. First operand 1726 states and 2804 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:23:48,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:23:50,697 WARN L515 Checker$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 23:23:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:51,742 INFO L93 Difference]: Finished difference Result 4668 states and 7721 transitions. [2021-11-12 23:23:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:23:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 113 [2021-11-12 23:23:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:51,773 INFO L225 Difference]: With dead ends: 4668 [2021-11-12 23:23:51,773 INFO L226 Difference]: Without dead ends: 2960 [2021-11-12 23:23:51,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 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 23:23:51,790 INFO L933 BasicCegarLoop]: 1105 mSDtfsCounter, 873 mSDsluCounter, 4010 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 134 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4761.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 5115 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.22ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4888.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:51,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 5115 Invalid, 491 Unknown, 0 Unchecked, 12.22ms Time], IncrementalHoareTripleChecker [134 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 4888.22ms Time] [2021-11-12 23:23:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-11-12 23:23:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2950. [2021-11-12 23:23:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2210 states have (on average 1.6040723981900453) internal successors, (3545), 2322 states have internal predecessors, (3545), 617 states have call successors, (617), 117 states have call predecessors, (617), 122 states have return successors, (701), 598 states have call predecessors, (701), 610 states have call successors, (701) [2021-11-12 23:23:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 4863 transitions. [2021-11-12 23:23:52,009 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 4863 transitions. Word has length 113 [2021-11-12 23:23:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:52,010 INFO L470 AbstractCegarLoop]: Abstraction has 2950 states and 4863 transitions. [2021-11-12 23:23:52,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:23:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 4863 transitions. [2021-11-12 23:23:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:23:52,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:52,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:52,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:52,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:52,227 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash 426526902, now seen corresponding path program 1 times [2021-11-12 23:23:52,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:52,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061712376] [2021-11-12 23:23:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:52,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:52,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:52,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:23:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:23:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:53,000 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 23:23:53,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:53,321 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 23:23:53,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:53,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061712376] [2021-11-12 23:23:53,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061712376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:53,322 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:53,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:23:53,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094773221] [2021-11-12 23:23:53,322 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:53,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:23:53,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:23:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:23:53,324 INFO L87 Difference]: Start difference. First operand 2950 states and 4863 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 23:23:55,354 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 23:23:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:57,348 INFO L93 Difference]: Finished difference Result 10249 states and 17777 transitions. [2021-11-12 23:23:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:23:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 116 [2021-11-12 23:23:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:57,428 INFO L225 Difference]: With dead ends: 10249 [2021-11-12 23:23:57,428 INFO L226 Difference]: Without dead ends: 7317 [2021-11-12 23:23:57,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 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 23:23:57,463 INFO L933 BasicCegarLoop]: 1348 mSDtfsCounter, 1193 mSDsluCounter, 4502 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3361.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 5850 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.16ms SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3655.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:57,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 5850 Invalid, 726 Unknown, 0 Unchecked, 20.16ms Time], IncrementalHoareTripleChecker [110 Valid, 615 Invalid, 1 Unknown, 0 Unchecked, 3655.78ms Time] [2021-11-12 23:23:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7317 states. [2021-11-12 23:23:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7317 to 5829. [2021-11-12 23:23:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5829 states, 4367 states have (on average 1.5937714678268835) internal successors, (6960), 4584 states have internal predecessors, (6960), 1204 states have call successors, (1204), 231 states have call predecessors, (1204), 257 states have return successors, (1641), 1189 states have call predecessors, (1641), 1192 states have call successors, (1641) [2021-11-12 23:23:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5829 states to 5829 states and 9805 transitions. [2021-11-12 23:23:57,932 INFO L78 Accepts]: Start accepts. Automaton has 5829 states and 9805 transitions. Word has length 116 [2021-11-12 23:23:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:23:57,932 INFO L470 AbstractCegarLoop]: Abstraction has 5829 states and 9805 transitions. [2021-11-12 23:23:57,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 6 states have internal predecessors, (138), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 23:23:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5829 states and 9805 transitions. [2021-11-12 23:23:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:23:57,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:57,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:23:57,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:23:58,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:23:58,160 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2137028789, now seen corresponding path program 1 times [2021-11-12 23:23:58,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:23:58,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712465848] [2021-11-12 23:23:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:58,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:23:58,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:23:58,164 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:23:58,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:23:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:23:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:23:58,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:23:59,014 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 23:23:59,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:23:59,250 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 23:23:59,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:23:59,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712465848] [2021-11-12 23:23:59,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712465848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:23:59,251 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:23:59,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:23:59,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43011858] [2021-11-12 23:23:59,251 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:23:59,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:23:59,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:23:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:23:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:23:59,253 INFO L87 Difference]: Start difference. First operand 5829 states and 9805 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 23:23:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:23:59,625 INFO L93 Difference]: Finished difference Result 11670 states and 19873 transitions. [2021-11-12 23:23:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:23:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 118 [2021-11-12 23:23:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:23:59,675 INFO L225 Difference]: With dead ends: 11670 [2021-11-12 23:23:59,675 INFO L226 Difference]: Without dead ends: 5859 [2021-11-12 23:23:59,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 231 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 23:23:59,705 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 19 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.30ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:23:59,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2572 Invalid, 90 Unknown, 0 Unchecked, 4.30ms Time], IncrementalHoareTripleChecker [18 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 103.75ms Time] [2021-11-12 23:23:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-11-12 23:24:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5849. [2021-11-12 23:24:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4382 states have (on average 1.5905979005020539) internal successors, (6970), 4599 states have internal predecessors, (6970), 1204 states have call successors, (1204), 241 states have call predecessors, (1204), 262 states have return successors, (1620), 1184 states have call predecessors, (1620), 1192 states have call successors, (1620) [2021-11-12 23:24:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 9794 transitions. [2021-11-12 23:24:00,159 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 9794 transitions. Word has length 118 [2021-11-12 23:24:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:00,160 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 9794 transitions. [2021-11-12 23:24:00,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-12 23:24:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 9794 transitions. [2021-11-12 23:24:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-12 23:24:00,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:00,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:00,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:00,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:00,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:00,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash 933674371, now seen corresponding path program 1 times [2021-11-12 23:24:00,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:00,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557980136] [2021-11-12 23:24:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:00,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:00,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:00,380 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:00,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:24:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:24:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:01,181 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 23:24:01,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:01,487 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 23:24:01,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:01,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557980136] [2021-11-12 23:24:01,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557980136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:01,488 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:01,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:24:01,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701647900] [2021-11-12 23:24:01,488 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:01,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:01,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:01,490 INFO L87 Difference]: Start difference. First operand 5849 states and 9794 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 23:24:03,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:05,819 INFO L93 Difference]: Finished difference Result 20533 states and 36852 transitions. [2021-11-12 23:24:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:24:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 126 [2021-11-12 23:24:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:05,929 INFO L225 Difference]: With dead ends: 20533 [2021-11-12 23:24:05,929 INFO L226 Difference]: Without dead ends: 14702 [2021-11-12 23:24:06,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 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 23:24:06,048 INFO L933 BasicCegarLoop]: 1352 mSDtfsCounter, 1163 mSDsluCounter, 4545 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 97 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3279.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 5897 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.89ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3508.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 5897 Invalid, 725 Unknown, 0 Unchecked, 20.89ms Time], IncrementalHoareTripleChecker [97 Valid, 627 Invalid, 1 Unknown, 0 Unchecked, 3508.51ms Time] [2021-11-12 23:24:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14702 states. [2021-11-12 23:24:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14702 to 11682. [2021-11-12 23:24:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11682 states, 8751 states have (on average 1.5835904468060793) internal successors, (13858), 9183 states have internal predecessors, (13858), 2383 states have call successors, (2383), 479 states have call predecessors, (2383), 547 states have return successors, (3909), 2371 states have call predecessors, (3909), 2361 states have call successors, (3909) [2021-11-12 23:24:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11682 states to 11682 states and 20150 transitions. [2021-11-12 23:24:07,227 INFO L78 Accepts]: Start accepts. Automaton has 11682 states and 20150 transitions. Word has length 126 [2021-11-12 23:24:07,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:07,228 INFO L470 AbstractCegarLoop]: Abstraction has 11682 states and 20150 transitions. [2021-11-12 23:24:07,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 23:24:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11682 states and 20150 transitions. [2021-11-12 23:24:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 23:24:07,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:07,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:07,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:07,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:07,445 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1969458387, now seen corresponding path program 1 times [2021-11-12 23:24:07,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:07,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889698904] [2021-11-12 23:24:07,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:07,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:07,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:07,449 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:07,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:24:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:08,234 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 23:24:08,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:08,639 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 23:24:08,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:08,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889698904] [2021-11-12 23:24:08,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889698904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:08,641 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:08,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:24:08,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404618029] [2021-11-12 23:24:08,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:08,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:24:08,643 INFO L87 Difference]: Start difference. First operand 11682 states and 20150 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 23:24:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:09,332 INFO L93 Difference]: Finished difference Result 23466 states and 41090 transitions. [2021-11-12 23:24:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2021-11-12 23:24:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:09,401 INFO L225 Difference]: With dead ends: 23466 [2021-11-12 23:24:09,401 INFO L226 Difference]: Without dead ends: 11802 [2021-11-12 23:24:09,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:09,462 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 21 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3422 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.75ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:09,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3422 Invalid, 93 Unknown, 0 Unchecked, 5.75ms Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 102.56ms Time] [2021-11-12 23:24:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2021-11-12 23:24:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 11782. [2021-11-12 23:24:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11782 states, 8841 states have (on average 1.5787806809184481) internal successors, (13958), 9253 states have internal predecessors, (13958), 2383 states have call successors, (2383), 519 states have call predecessors, (2383), 557 states have return successors, (3879), 2361 states have call predecessors, (3879), 2361 states have call successors, (3879) [2021-11-12 23:24:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11782 states to 11782 states and 20220 transitions. [2021-11-12 23:24:10,315 INFO L78 Accepts]: Start accepts. Automaton has 11782 states and 20220 transitions. Word has length 128 [2021-11-12 23:24:10,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:10,316 INFO L470 AbstractCegarLoop]: Abstraction has 11782 states and 20220 transitions. [2021-11-12 23:24:10,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-12 23:24:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 11782 states and 20220 transitions. [2021-11-12 23:24:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:24:10,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:10,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:10,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 23:24:10,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:10,535 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:10,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:10,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1151447714, now seen corresponding path program 1 times [2021-11-12 23:24:10,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:10,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938597280] [2021-11-12 23:24:10,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:10,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:10,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:10,537 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:10,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:24:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:24:11,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:11,437 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 23:24:11,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:11,749 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 23:24:11,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:11,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938597280] [2021-11-12 23:24:11,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938597280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:11,749 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:11,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:24:11,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925289596] [2021-11-12 23:24:11,750 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:11,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:11,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:11,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:11,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:11,751 INFO L87 Difference]: Start difference. First operand 11782 states and 20220 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 23:24:13,770 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 23:24:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:16,964 INFO L93 Difference]: Finished difference Result 41281 states and 77769 transitions. [2021-11-12 23:24:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:24:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 136 [2021-11-12 23:24:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:17,237 INFO L225 Difference]: With dead ends: 41281 [2021-11-12 23:24:17,238 INFO L226 Difference]: Without dead ends: 29517 [2021-11-12 23:24:17,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 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 23:24:17,325 INFO L933 BasicCegarLoop]: 1351 mSDtfsCounter, 1131 mSDsluCounter, 5546 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 92 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3566.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 6897 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.59ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3806.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:17,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 6897 Invalid, 1138 Unknown, 0 Unchecked, 19.59ms Time], IncrementalHoareTripleChecker [92 Valid, 1045 Invalid, 1 Unknown, 0 Unchecked, 3806.32ms Time] [2021-11-12 23:24:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29517 states. [2021-11-12 23:24:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29517 to 23633. [2021-11-12 23:24:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 17729 states have (on average 1.572508319702183) internal successors, (27879), 18561 states have internal predecessors, (27879), 4746 states have call successors, (4746), 1035 states have call predecessors, (4746), 1157 states have return successors, (9618), 4740 states have call predecessors, (9618), 4704 states have call successors, (9618) [2021-11-12 23:24:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 42243 transitions. [2021-11-12 23:24:19,554 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 42243 transitions. Word has length 136 [2021-11-12 23:24:19,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:19,555 INFO L470 AbstractCegarLoop]: Abstraction has 23633 states and 42243 transitions. [2021-11-12 23:24:19,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 6 states have internal predecessors, (156), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 23:24:19,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 42243 transitions. [2021-11-12 23:24:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:24:19,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:19,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:19,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:19,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:19,781 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:19,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2090612949, now seen corresponding path program 1 times [2021-11-12 23:24:19,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:19,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380519816] [2021-11-12 23:24:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:19,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:19,784 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:19,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:24:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:24:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:20,653 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 23:24:20,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:20,890 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 23:24:20,890 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:20,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380519816] [2021-11-12 23:24:20,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380519816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:20,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:20,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 23:24:20,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168149415] [2021-11-12 23:24:20,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:20,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:24:20,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:20,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:24:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:24:20,892 INFO L87 Difference]: Start difference. First operand 23633 states and 42243 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:24:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:22,347 INFO L93 Difference]: Finished difference Result 47488 states and 86678 transitions. [2021-11-12 23:24:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:24:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 139 [2021-11-12 23:24:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:22,496 INFO L225 Difference]: With dead ends: 47488 [2021-11-12 23:24:22,497 INFO L226 Difference]: Without dead ends: 23873 [2021-11-12 23:24:22,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:22,663 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 21 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3422 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.88ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:22,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3422 Invalid, 95 Unknown, 0 Unchecked, 3.88ms Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 90.91ms Time] [2021-11-12 23:24:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23873 states. [2021-11-12 23:24:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23873 to 23833. [2021-11-12 23:24:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23833 states, 17909 states have (on average 1.5678709028979843) internal successors, (28079), 18741 states have internal predecessors, (28079), 4746 states have call successors, (4746), 1075 states have call predecessors, (4746), 1177 states have return successors, (9582), 4720 states have call predecessors, (9582), 4704 states have call successors, (9582) [2021-11-12 23:24:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23833 states to 23833 states and 42407 transitions. [2021-11-12 23:24:24,692 INFO L78 Accepts]: Start accepts. Automaton has 23833 states and 42407 transitions. Word has length 139 [2021-11-12 23:24:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:24,693 INFO L470 AbstractCegarLoop]: Abstraction has 23833 states and 42407 transitions. [2021-11-12 23:24:24,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:24:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 23833 states and 42407 transitions. [2021-11-12 23:24:24,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:24:24,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:24,697 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] [2021-11-12 23:24:24,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:24,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:24,911 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1732251691, now seen corresponding path program 1 times [2021-11-12 23:24:24,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:24,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006267066] [2021-11-12 23:24:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:24,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:24,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:24,913 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:24,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:24:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:25,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:24:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:25,745 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 23:24:25,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:26,071 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 23:24:26,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:26,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006267066] [2021-11-12 23:24:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006267066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:26,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:26,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:24:26,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728607199] [2021-11-12 23:24:26,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:26,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:26,074 INFO L87 Difference]: Start difference. First operand 23833 states and 42407 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 23:24:28,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:32,677 INFO L93 Difference]: Finished difference Result 83179 states and 167859 transitions. [2021-11-12 23:24:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:24:32,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 148 [2021-11-12 23:24:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:33,303 INFO L225 Difference]: With dead ends: 83179 [2021-11-12 23:24:33,303 INFO L226 Difference]: Without dead ends: 59364 [2021-11-12 23:24:33,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 289 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 23:24:33,478 INFO L933 BasicCegarLoop]: 1207 mSDtfsCounter, 1205 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 150 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3060.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 5438 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.24ms SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3218.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:33,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 5438 Invalid, 697 Unknown, 0 Unchecked, 12.24ms Time], IncrementalHoareTripleChecker [150 Valid, 546 Invalid, 1 Unknown, 0 Unchecked, 3218.58ms Time] [2021-11-12 23:24:33,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59364 states. [2021-11-12 23:24:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59364 to 47880. [2021-11-12 23:24:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47880 states, 35965 states have (on average 1.562407896566106) internal successors, (56192), 37657 states have internal predecessors, (56192), 9477 states have call successors, (9477), 2147 states have call predecessors, (9477), 2437 states have return successors, (24441), 9483 states have call predecessors, (24441), 9395 states have call successors, (24441) [2021-11-12 23:24:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47880 states to 47880 states and 90110 transitions. [2021-11-12 23:24:37,375 INFO L78 Accepts]: Start accepts. Automaton has 47880 states and 90110 transitions. Word has length 148 [2021-11-12 23:24:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:37,376 INFO L470 AbstractCegarLoop]: Abstraction has 47880 states and 90110 transitions. [2021-11-12 23:24:37,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-12 23:24:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 47880 states and 90110 transitions. [2021-11-12 23:24:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:24:37,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:37,380 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] [2021-11-12 23:24:37,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-12 23:24:37,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:37,599 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 321320219, now seen corresponding path program 1 times [2021-11-12 23:24:37,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:37,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557157227] [2021-11-12 23:24:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:37,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:37,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:37,601 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:37,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:24:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:24:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:38,417 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 23:24:38,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:38,753 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 23:24:38,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:38,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557157227] [2021-11-12 23:24:38,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557157227] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:38,754 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:38,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:24:38,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747325502] [2021-11-12 23:24:38,754 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:38,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:38,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:38,756 INFO L87 Difference]: Start difference. First operand 47880 states and 90110 transitions. Second operand has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 23:24:40,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:42,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:24:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:49,694 INFO L93 Difference]: Finished difference Result 109308 states and 222528 transitions. [2021-11-12 23:24:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:24:49,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) Word has length 150 [2021-11-12 23:24:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:50,410 INFO L225 Difference]: With dead ends: 109308 [2021-11-12 23:24:50,410 INFO L226 Difference]: Without dead ends: 61446 [2021-11-12 23:24:50,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:24:50,723 INFO L933 BasicCegarLoop]: 1315 mSDtfsCounter, 2124 mSDsluCounter, 3560 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 202 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6308.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 4875 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.24ms SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6667.81ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:50,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2211 Valid, 4875 Invalid, 2165 Unknown, 0 Unchecked, 16.24ms Time], IncrementalHoareTripleChecker [202 Valid, 1961 Invalid, 2 Unknown, 0 Unchecked, 6667.81ms Time] [2021-11-12 23:24:50,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61446 states. [2021-11-12 23:24:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61446 to 55404. [2021-11-12 23:24:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55404 states, 41085 states have (on average 1.5599367165632225) internal successors, (64090), 43225 states have internal predecessors, (64090), 11529 states have call successors, (11529), 2451 states have call predecessors, (11529), 2789 states have return successors, (32735), 11495 states have call predecessors, (32735), 11447 states have call successors, (32735) [2021-11-12 23:24:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55404 states to 55404 states and 108354 transitions. [2021-11-12 23:24:54,513 INFO L78 Accepts]: Start accepts. Automaton has 55404 states and 108354 transitions. Word has length 150 [2021-11-12 23:24:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:54,514 INFO L470 AbstractCegarLoop]: Abstraction has 55404 states and 108354 transitions. [2021-11-12 23:24:54,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.5) internal successors, (188), 8 states have internal predecessors, (188), 4 states have call successors, (36), 4 states have call predecessors, (36), 6 states have return successors, (34), 4 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-12 23:24:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 55404 states and 108354 transitions. [2021-11-12 23:24:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:24:54,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:54,516 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:54,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:54,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:54,731 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1177777931, now seen corresponding path program 1 times [2021-11-12 23:24:54,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:54,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905178818] [2021-11-12 23:24:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:54,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:54,733 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:54,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:24:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:24:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 23:24:56,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-12 23:24:57,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:57,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905178818] [2021-11-12 23:24:57,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905178818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:57,516 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:57,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-12 23:24:57,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184946020] [2021-11-12 23:24:57,516 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:57,518 INFO L87 Difference]: Start difference. First operand 55404 states and 108354 transitions. Second operand has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:24:59,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:07,731 INFO L93 Difference]: Finished difference Result 132801 states and 267648 transitions. [2021-11-12 23:25:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:25:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) Word has length 154 [2021-11-12 23:25:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:08,531 INFO L225 Difference]: With dead ends: 132801 [2021-11-12 23:25:08,531 INFO L226 Difference]: Without dead ends: 77415 [2021-11-12 23:25:08,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:25:08,844 INFO L933 BasicCegarLoop]: 1096 mSDtfsCounter, 1039 mSDsluCounter, 2792 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 160 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4231.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 3888 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.55ms SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4753.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:08,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 3888 Invalid, 685 Unknown, 0 Unchecked, 9.55ms Time], IncrementalHoareTripleChecker [160 Valid, 524 Invalid, 1 Unknown, 0 Unchecked, 4753.73ms Time] [2021-11-12 23:25:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77415 states. [2021-11-12 23:25:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77415 to 70634. [2021-11-12 23:25:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70634 states, 51826 states have (on average 1.5573457338015668) internal successors, (80711), 54649 states have internal predecessors, (80711), 15701 states have call successors, (15701), 2629 states have call predecessors, (15701), 3106 states have return successors, (45091), 15161 states have call predecessors, (45091), 15614 states have call successors, (45091) [2021-11-12 23:25:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70634 states to 70634 states and 141503 transitions. [2021-11-12 23:25:14,626 INFO L78 Accepts]: Start accepts. Automaton has 70634 states and 141503 transitions. Word has length 154 [2021-11-12 23:25:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:14,627 INFO L470 AbstractCegarLoop]: Abstraction has 70634 states and 141503 transitions. [2021-11-12 23:25:14,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 4 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (36), 4 states have call predecessors, (36), 4 states have call successors, (36) [2021-11-12 23:25:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 70634 states and 141503 transitions. [2021-11-12 23:25:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 23:25:14,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:14,631 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] [2021-11-12 23:25:14,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:14,852 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1730407387, now seen corresponding path program 1 times [2021-11-12 23:25:14,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:14,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674711666] [2021-11-12 23:25:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:14,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:14,854 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:14,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b83a03bb-1487-45b8-9ace-c4f0e15c688e/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:25:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:25:15,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:15,547 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 23:25:15,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:15,792 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 23:25:15,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:15,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674711666] [2021-11-12 23:25:15,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674711666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:15,792 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:15,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:25:15,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49187069] [2021-11-12 23:25:15,793 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:15,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:25:15,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:15,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:25:15,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:25:15,795 INFO L87 Difference]: Start difference. First operand 70634 states and 141503 transitions. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22)